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1.
Nature ; 586(7831): 776-778, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32408337

RESUMO

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first detected in Wuhan in December 2019 and caused coronavirus disease 2019 (COVID-19)1,2. In 2003, the closely related SARS-CoV had been detected in domestic cats and a dog3. However, little is known about the susceptibility of domestic pet mammals to SARS-CoV-2. Here, using PCR with reverse transcription, serology, sequencing the viral genome and virus isolation, we show that 2 out of 15 dogs from households with confirmed human cases of COVID-19 in Hong Kong were found to be infected with SARS-CoV-2. SARS-CoV-2 RNA was detected in five nasal swabs collected over a 13-day period from a 17-year-old neutered male Pomeranian. A 2.5-year-old male German shepherd was positive for SARS-CoV-2 RNA on two occasions and virus was isolated from nasal and oral swabs. Antibody responses were detected in both dogs using plaque-reduction-neutralization assays. Viral genetic sequences of viruses from the two dogs were identical to the virus detected in the respective human cases. The dogs remained asymptomatic during quarantine. The evidence suggests that these are instances of human-to-animal transmission of SARS-CoV-2. It is unclear whether infected dogs can transmit the virus to other animals or back to humans.


Assuntos
Betacoronavirus/isolamento & purificação , Infecções por Coronavirus/transmissão , Infecções por Coronavirus/veterinária , Doenças do Cão/transmissão , Doenças do Cão/virologia , Pandemias/veterinária , Pneumonia Viral/transmissão , Pneumonia Viral/veterinária , Zoonoses/transmissão , Zoonoses/virologia , Enzima de Conversão de Angiotensina 2 , Animais , Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/imunologia , Betacoronavirus/genética , COVID-19 , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/virologia , Cães , Feminino , Hong Kong/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Peptidil Dipeptidase A/metabolismo , Filogenia , Pneumonia Viral/epidemiologia , Pneumonia Viral/virologia , Receptores Virais/metabolismo , SARS-CoV-2 , Fatores de Tempo
2.
J Gen Virol ; 105(7)2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39045787

RESUMO

Domestic dogs (Canis lupus familiaris) live with humans, frequently contact other animals and may serve as intermediary hosts for the transmission of viruses. Free-roaming dogs, which account for over 70% of the world's domestic dog population, may pose a particularly high risk in this regard. We conducted an epidemiological study of dog viromes in three locations in Uganda, representing low, medium and high rates of contact with wildlife, ranging from dogs owned specifically for traditional hunting in a biodiversity and disease 'hotspot' to pets in an affluent suburb. We quantified rates of contact between dogs and wildlife through owner interviews and conducted canine veterinary health assessments. We then applied broad-spectrum viral metagenomics to blood plasma samples, from which we identified 46 viruses, 44 of which were previously undescribed, in three viral families, Sedoreoviridae, Parvoviridae and Anelloviridae. All 46 viruses (100 %) occurred in the high-contact population of dogs compared to 63 % and 39 % in the medium- and low-contact populations, respectively. Viral prevalence ranged from 2.1 % to 92.0 % among viruses and was highest, on average, in the high-contact population (22.3 %), followed by the medium-contact (12.3 %) and low-contact (4.8 %) populations. Viral richness (number of viruses per dog) ranged from 0 to 27 and was markedly higher, on average, in the high-contact population (10.2) than in the medium-contact (5.7) or low-contact (2.3) populations. Viral richness was strongly positively correlated with the number of times per year that a dog was fed wildlife and negatively correlated with the body condition score, body temperature and packed cell volume. Viral abundance (cumulative normalized metagenomic read density) varied 124-fold among dogs and was, on average, 4.1-fold higher and 2.4-fold higher in the high-contact population of dogs than in the low-contact or medium-contact populations, respectively. Viral abundance was also strongly positively correlated with the number of times per year that a dog was fed wildlife, negatively correlated with packed cell volume and positively correlated with white blood cell count. These trends were driven by nine viruses in the family Anelloviridae, genus Thetatorquevirus, and by one novel virus in the family Sedoreoviridae, genus Orbivirus. The genus Orbivirus contains zoonotic viruses and viruses that dogs can acquire through ingestion of infected meat. Overall, our findings show that viral prevalence, richness and abundance increased across a gradient of contact between dogs and wildlife and that the health status of the dog modified viral infection. Other ecological, geographic and social factors may also have contributed to these trends. Our finding of a novel orbivirus in dogs with high wildlife contact supports the idea that free-roaming dogs may serve as intermediary hosts for viruses of medical importance to humans and other animals.


Assuntos
Animais Selvagens , Doenças do Cão , Animais , Cães , Uganda/epidemiologia , Doenças do Cão/virologia , Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Prevalência , Animais Selvagens/virologia , Viroma , Vírus/classificação , Vírus/isolamento & purificação , Vírus/genética , Metagenômica , Anelloviridae/genética , Anelloviridae/isolamento & purificação , Anelloviridae/classificação , Humanos , Viroses/epidemiologia , Viroses/veterinária , Viroses/transmissão , Viroses/virologia
3.
PLoS Pathog ; 16(4): e1008409, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32287326

RESUMO

The continual emergence of novel influenza A strains from non-human hosts requires constant vigilance and the need for ongoing research to identify strains that may pose a human public health risk. Since 1999, canine H3 influenza A viruses (CIVs) have caused many thousands or millions of respiratory infections in dogs in the United States. While no human infections with CIVs have been reported to date, these viruses could pose a zoonotic risk. In these studies, the National Institutes of Allergy and Infectious Diseases (NIAID) Centers of Excellence for Influenza Research and Surveillance (CEIRS) network collaboratively demonstrated that CIVs replicated in some primary human cells and transmitted effectively in mammalian models. While people born after 1970 had little or no pre-existing humoral immunity against CIVs, the viruses were sensitive to existing antivirals and we identified a panel of H3 cross-reactive human monoclonal antibodies (hmAbs) that could have prophylactic and/or therapeutic value. Our data predict these CIVs posed a low risk to humans. Importantly, we showed that the CEIRS network could work together to provide basic research information important for characterizing emerging influenza viruses, although there were valuable lessons learned.


Assuntos
Doenças Transmissíveis Emergentes/veterinária , Doenças do Cão/virologia , Vírus da Influenza A Subtipo H3N2/isolamento & purificação , Vírus da Influenza A Subtipo H3N8/isolamento & purificação , Vírus da Influenza A/isolamento & purificação , Zoonoses/virologia , Animais , Doenças Transmissíveis Emergentes/transmissão , Doenças Transmissíveis Emergentes/virologia , Doenças do Cão/transmissão , Cães , Furões , Cobaias , Humanos , Vírus da Influenza A Subtipo H3N2/classificação , Vírus da Influenza A Subtipo H3N2/genética , Vírus da Influenza A Subtipo H3N8/classificação , Vírus da Influenza A Subtipo H3N8/genética , Vírus da Influenza A/classificação , Vírus da Influenza A/genética , Influenza Humana/transmissão , Influenza Humana/virologia , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos DBA , Estados Unidos , Zoonoses/transmissão
4.
Malar J ; 20(1): 154, 2021 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-33731115

RESUMO

BACKGROUND: Understanding malaria vector's population dynamics and their spatial distribution is important to define when and where the largest infection risks occur and implement appropriate control strategies. In this study, the seasonal spatio-temporal dynamics of the malaria vector population and transmission intensity along intermittent rivers in a semi-arid area of central Ethiopia were investigated. METHODS: Mosquitoes were collected monthly from five clusters, 2 close to a river and 3 away from a river, using pyrethrum spray catches from November 2014 to July 2016. Mosquito abundance was analysed by the mixed Poisson regression model. The human blood index and sporozoite rate was compared between seasons by a logistic regression model. RESULTS: A total of 2784 adult female Anopheles gambiae sensu lato (s.l.) were collected during the data collection period. All tested mosquitoes (n = 696) were identified as Anopheles arabiensis by polymerase chain reaction. The average daily household count was significantly higher (P = 0.037) in the clusters close to the river at 5.35 (95% CI 2.41-11.85) compared to the clusters away from the river at 0.033 (95% CI 0.02-0.05). Comparing the effect of vicinity of the river by season, a significant effect of closeness to the river was found during the dry season (P = 0.027) and transition from dry to wet season (P = 0.032). Overall, An. arabiensis had higher bovine blood index (62.8%) as compared to human blood index (23.8%), ovine blood index (9.2%) and canine blood index (0.1%). The overall sporozoite rate was 3.9% and 0% for clusters close to and away from the river, respectively. The overall Plasmodium falciparum and Plasmodium vivax entomologic inoculation rates for An. arabiensis in clusters close to the river were 0.8 and 2.2 infective bites per person/year, respectively. CONCLUSION: Mosquito abundance and malaria transmission intensity in clusters close to the river were higher which could be attributed to the riverine breeding sites. Thus, vector control interventions including targeted larval source management should be implemented to reduce the risk of malaria infection in the area.


Assuntos
Distribuição Animal , Anopheles/fisiologia , Clima Desértico , Malária Falciparum/transmissão , Malária Vivax/transmissão , Mosquitos Vetores/fisiologia , Animais , Anopheles/parasitologia , Doenças do Cão/parasitologia , Doenças do Cão/transmissão , Cães , Etiópia , Feminino , Humanos , Malária Falciparum/veterinária , Malária Vivax/veterinária , Masculino , Mosquitos Vetores/parasitologia , Plasmodium falciparum/isolamento & purificação , Plasmodium vivax/isolamento & purificação , Dinâmica Populacional , Rios , Ovinos , Doenças dos Ovinos/parasitologia , Doenças dos Ovinos/transmissão , Carneiro Doméstico
5.
Vet Res ; 52(1): 22, 2021 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-33588935

RESUMO

COVID-19 is a zoonotic disease caused by SARS-CoV-2. Infections of animals with SARS-CoV-2 have recently been reported, and an increase of severe lung pathologies in domestic dogs has also been detected by veterinarians in Spain. Therefore, further descriptions of the pathological processes in those animals that show symptoms similar to those described in humans affected by COVID-19 would be highly valuable. The potential for companion animals to contribute to the continued transmission and community spread of this known human-to-human disease is an urgent issue to be considered. Forty animals with pulmonary pathologies were studied by chest X-ray, ultrasound analysis, and computed tomography. Nasopharyngeal and rectal swabs were analyzed to detect canine pathogens, including SARS-CoV-2. An additional twenty healthy dogs living in SARS-CoV-2-positive households were included. Immunoglobulin detection by several immunoassays was performed. Our findings show that sick dogs presented severe alveolar or interstitial patterns with pulmonary opacity, parenchymal abnormalities, and bilateral lesions. The forty sick dogs were negative for SARS-CoV-2 but Mycoplasma spp. was detected in 26 of 33 dogs. Five healthy and one pathological dog presented IgG against SARS-CoV-2. Here we report that despite detecting dogs with α-SARS-CoV-2 IgG, we never obtained a positive RT-qPCR for SARS-SoV-2, not even in dogs with severe pulmonary disease; suggesting that even in the case of canine infection, transmission would be unlikely. Moreover, dogs living in COVID-19-positive households could have been more highly exposed to infection with SARS-CoV-2.


Assuntos
COVID-19/veterinária , Doenças do Cão/transmissão , Imunoglobulinas/sangue , Zoonoses/transmissão , Animais , COVID-19/transmissão , COVID-19/virologia , Doenças do Cão/virologia , Cães , Feminino , Imunidade Humoral , Masculino , Espanha , Zoonoses/virologia
6.
BMC Vet Res ; 17(1): 63, 2021 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-33526020

RESUMO

BACKGROUND: Foot-and-mouth disease (FMD) is a highly infectious viral disease, recognised to affect animals in the order Artiodactyla. The disease is rarely fatal in adult animals, however high mortality is associated with neonatal and juvenile infection. CASE PRESENTATION: Five puppies died after being fed lamb carcases, the lambs having died during an outbreak of FMD in Iran. Following a post-mortem examination, cardiac tissue from one of the dead puppies was subjected to virus isolation, antigen ELISA, real-time RT-PCR, sequencing and confocal microscopy to assess the presence and characteristics of any FMD virus. The virological and microscopic examination of the cardiac tissue provided evidence of FMD virus replication in the canine heart. CONCLUSIONS: The data generated in this study demonstrate for the first time that FMD virus can internalise and replicate in dogs and may represent an epidemiologically significant event in FMD transmission, highlighting the dangers of feeding diseased animal carcases to other species. The reporting of this finding may also focus attention on similar disease presentations in dogs in FMD endemic countries allowing a better understanding of the prevalence of such events.


Assuntos
Doenças do Cão/virologia , Vírus da Febre Aftosa/isolamento & purificação , Febre Aftosa/virologia , Animais , Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Cães , Febre Aftosa/epidemiologia , Febre Aftosa/transmissão , Coração/virologia , Irã (Geográfico)/epidemiologia , Miócitos Cardíacos/patologia , Miócitos Cardíacos/virologia , Carne Vermelha/virologia , Ovinos , Replicação Viral
7.
Med Vet Entomol ; 35(2): 147-157, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-32918501

RESUMO

The brown dog tick, Rhipicephalus sanguineus sensu lato (s.l.) Latreille (Acari: Ixodidae), is a peridomestic, cosmopolitan parasite of dogs known to vector numerous pathogens of veterinary and medical importance. Recent phylogenetic analyses separate this tick into temperate and tropical lineages. Populations of Rh. sanguineus s.l. have been reported to exhibit sodium channel target site insensitivity to permethrin and etofenprox, which is likely due to the prolonged use of pyrethroids against many pests in and around the home. In this study, populations collected in the Caribbean, Africa, Asia, Europe and North America, were tested to identify the distribution of a known resistance mechanism, pathogen-vector interactions and phylogeny in relation to latitude. Using molecular assays, populations from 29 distinct locations were simultaneously geographically typed and screened for bacterial infection by Rickettsia, Ehrlichia, Babesia and Hepatozoon species, and for the presence of a sodium channel single nucleotide polymorphism known to confer permethrin resistance. Implications of these results on Rh. sanguineus s.l. management in association with geographical distribution will be discussed.


Assuntos
Doenças do Cão/transmissão , Resistência a Inseticidas/genética , Permetrina/farmacologia , Rhipicephalus sanguineus , Canais de Sódio/genética , Animais , Vetores Aracnídeos/genética , Vetores Aracnídeos/microbiologia , Vetores Aracnídeos/parasitologia , Proteínas de Artrópodes/genética , Ásia/epidemiologia , Babesia/isolamento & purificação , Vetores de Doenças , Doenças do Cão/microbiologia , Doenças do Cão/parasitologia , Cães , Ectoparasitoses/tratamento farmacológico , Ectoparasitoses/prevenção & controle , Ectoparasitoses/veterinária , Ehrlichia/isolamento & purificação , Europa (Continente)/epidemiologia , América do Norte/epidemiologia , Filogenia , Filogeografia , Prevalência , Piretrinas/farmacologia , Rhipicephalus sanguineus/genética , Rhipicephalus sanguineus/microbiologia , Rhipicephalus sanguineus/parasitologia , Rickettsia/isolamento & purificação , Doenças Transmitidas por Carrapatos/microbiologia , Doenças Transmitidas por Carrapatos/parasitologia , Doenças Transmitidas por Carrapatos/transmissão , Doenças Transmitidas por Carrapatos/veterinária
8.
Parasitol Res ; 120(2): 725-729, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33415399

RESUMO

In this work, we analyze data that support an epidemiological link between cases of canine monocytic ehrlichiosis (CME) by Ehrlichia canis and the presence of Rhipicephalus sanguineus sensu stricto as vector in an endemic area for this tick in Argentina. In a blood sample of a 1-year-old toy poodle with CME compatible clinical signs, which showed CME typical morulae in monocytes in Giemsa-stained blood smear, DNA of E. canis was detected by PCR. Further, DNA of E. canis was also detected in a female of R. sanguineus s.s. collected on the infected dog. Rhipicephalus sanguineus s.s. is the only member of the R. sanguineus group that prevails in the study area. The results of this study suggest that R. sanguineus s.s. may play a more important role in the transmission of E. canis than it was assumed so far. The epidemiological link between CME cases and R. sanguineus s.s. as vector in temperate areas of Argentina described in this work contrast previous studies which found that R. sanguineus sensu lato "tropical lineage" (which is absent in the study area) is competent to transmit E. canis but not R. sanguineus s.s.


Assuntos
Vetores Aracnídeos/parasitologia , Doenças do Cão/parasitologia , Ehrlichia canis/isolamento & purificação , Ehrlichiose/veterinária , Rhipicephalus sanguineus/parasitologia , Animais , Argentina , Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Cães , Ehrlichiose/epidemiologia , Ehrlichiose/parasitologia , Ehrlichiose/transmissão , Feminino , Monócitos/parasitologia
9.
Parasitol Res ; 120(2): 563-568, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33462709

RESUMO

Cystic echinococcosis is a neglected, zoonotic disease in Turkey. The disease is commonly seen in rural areas where the local population is in close contact with livestock and dogs. This research aimed to molecularly identify of hydatid cysts in cattle and human isolates from Konya, Turkey. Following sample collection, direct microscopy was performed. After direct examination, total DNA was extracted, and positive PCR products of cox 1 mitochondrial gene (~ 875 bp) were sequenced. A total of 83 hydatid cysts (cattle n = 57 and human n = 26), 82 were identified as Echinococcus granulosus sensu stricto (G1-G3 genotypes), and one human isolate was characterized as Echinococcus equinus (G4 genotype). Fertility rates of cysts belonging to cattle for liver and lung cysts were 93.3% and 80%, respectively. Out of 26 human originated isolates, 18 (69.2%) of cysts were found to be fertile. To the best of our knowledge, this is the first report of E. equinus from human host in Turkey.


Assuntos
Doenças dos Bovinos/parasitologia , Doenças do Cão/parasitologia , Equinococose/parasitologia , Echinococcus/genética , Animais , Bovinos , Doenças dos Bovinos/epidemiologia , Doenças dos Bovinos/transmissão , Ciclo-Oxigenase 1/genética , Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Cães , Equinococose/epidemiologia , Equinococose/transmissão , Echinococcus/isolamento & purificação , Echinococcus/fisiologia , Echinococcus granulosus/genética , Echinococcus granulosus/isolamento & purificação , Echinococcus granulosus/fisiologia , Genótipo , Proteínas de Helminto/genética , Humanos , Fígado/parasitologia , Pulmão/parasitologia , Proteínas Mitocondriais/genética , Reação em Cadeia da Polimerase , Turquia/epidemiologia , Zoonoses
10.
J Virol ; 94(1)2019 12 12.
Artigo em Inglês | MEDLINE | ID: mdl-31619551

RESUMO

Canine parvovirus (CPV) is a highly successful pathogen that has sustained pandemic circulation in dogs for more than 40 years. Here, integrating full-genome and deep-sequencing analyses, structural information, and in vitro experimentation, we describe the macro- and microscale features that accompany CPV's evolutionary success. Despite 40 years of viral evolution, all CPV variants are more than ∼99% identical in nucleotide sequence, with only a limited number (<40) of substitutions becoming fixed or widespread during this time. Notably, most substitutions in the major capsid protein (VP2) gene are nonsynonymous, altering amino acid residues that fall within, or adjacent to, the overlapping receptor footprint or antigenic regions, suggesting that natural selection has channeled much of CPV evolution. Among the limited number of variable sites, CPV genomes exhibit complex patterns of variation that include parallel evolution, reversion, and recombination, compromising phylogenetic inference. At the intrahost level, deep sequencing of viral DNA in original clinical samples from dogs and other host species sampled between 1978 and 2018 revealed few subconsensus single nucleotide variants (SNVs) above ∼0.5%, and experimental passages demonstrate that substantial preexisting genetic variation is not necessarily required for rapid host receptor-driven adaptation. Together, these findings suggest that although CPV is capable of rapid host adaptation, a relatively low mutation rate, pleiotropy, and/or a lack of selective challenges since its initial emergence have inhibited the long-term accumulation of genetic diversity. Hence, continuously high levels of inter- and intrahost diversity are not necessarily required for virus host adaptation.IMPORTANCE Rapid mutation rates and correspondingly high levels of intra- and interhost diversity are often cited as key features of viruses with the capacity for emergence and sustained transmission in a new host species. However, most of this information comes from studies of RNA viruses, with relatively little known about evolutionary processes in viruses with single-stranded DNA (ssDNA) genomes. Here, we provide a unique model of virus evolution, integrating both long-term global-scale and short-term intrahost evolutionary processes of an ssDNA virus that emerged to cause a pandemic in a new host animal. Our analysis reveals that successful host jumping and sustained transmission does not necessarily depend on a high level of intrahost diversity nor result in the continued accumulation of high levels of long-term evolution change. These findings indicate that all aspects of the biology and ecology of a virus are relevant when considering their adaptability.


Assuntos
Proteínas do Capsídeo/genética , DNA Viral/genética , Doenças do Cão/epidemiologia , Genoma Viral , Infecções por Parvoviridae/veterinária , Parvovirus Canino/genética , Proteínas não Estruturais Virais/genética , Adaptação Fisiológica/genética , Animais , Evolução Biológica , Proteínas do Capsídeo/classificação , Proteínas do Capsídeo/metabolismo , DNA Viral/metabolismo , Doenças do Cão/transmissão , Doenças do Cão/virologia , Cães , Raposas/virologia , Especificidade de Hospedeiro/genética , Modelos Moleculares , Mutação , Infecções por Parvoviridae/epidemiologia , Infecções por Parvoviridae/transmissão , Infecções por Parvoviridae/virologia , Parvovirus Canino/classificação , Parvovirus Canino/patogenicidade , Filogenia , Conformação Proteica , Cães Guaxinins/virologia , Guaxinins/virologia , Proteínas não Estruturais Virais/classificação , Proteínas não Estruturais Virais/metabolismo , Sequenciamento Completo do Genoma
11.
PLoS Pathog ; 14(12): e1007392, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30521641

RESUMO

Despite ongoing efforts to control transmission, rabies prevention remains a challenge in many developing countries, especially in rural areas of China where re-emerging rabies is under-reported due to a lack of sustained animal surveillance. By taking advantage of detailed genomic and epidemiological data for the re-emerging rabies outbreak in Yunnan Province, China, collected between 1999 and 2015, we reconstruct the demographic and dispersal history of domestic dog rabies virus (RABV) as well as the dynamics of dog-to-dog and dog-to-human transmission. Phylogeographic analyses reveal a lower diffusion coefficient than previously estimated for dog RABV dissemination in northern Africa. Furthermore, epidemiological analyses reveal transmission rates between dogs, as well as between dogs and humans, lower than estimates for Africa. Finally, we show that reconstructed epidemic history of RABV among dogs and the dynamics of rabid dogs are consistent with the recorded human rabies cases. This work illustrates the benefits of combining phylogeographic and epidemic modelling approaches for uncovering the spatiotemporal dynamics of zoonotic diseases, with both approaches providing estimates of key epidemiological parameters.


Assuntos
Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Raiva/epidemiologia , Raiva/transmissão , Zoonoses/epidemiologia , Zoonoses/transmissão , Animais , China/epidemiologia , Doenças do Cão/virologia , Cães , Animais de Estimação , Filogenia , Filogeografia , Vírus da Raiva/genética , População Rural
13.
BMC Public Health ; 20(1): 1293, 2020 Aug 26.
Artigo em Inglês | MEDLINE | ID: mdl-32847503

RESUMO

BACKGROUND: This study aimed to assess the extent of knowledge and understanding of rabies disease in rural and urban communities of Pakistan. It also identified malpractices after suspected dog bite that might pose a risk for humans contracting rabies. METHODS: A cross-sectional study was conducted (n = 1466) on people having different age groups and educational levels in four different geographic regions of Punjab and Khyber Pakhtunkhwa provinces in Pakistan. Knowledge, attitude, and practices of people were assessed using a structured questionnaire. We used a bivariate and multivariate analysis to study the association between rabies related mortalities in near or extended family members and different risk behaviors. RESULTS: Our results demonstrate that the majority of the juvenile population (less than 18 years of age) were not aware of the clinical signs of rabies in animals. 75% of the total respondents were not vaccinated against rabies, 60% did not seek a doctor's advice after a suspected animal bite, and 55% had inadequate health care facilities for rabies patients in local hospitals. Respondents that had pets at home had not vaccinated (38%; p < 0.05; odds ratio 1.58) themselves against rabies due to lack of knowledge and awareness of pre-exposure prophylaxis for rabies (51%; p < 0.05; odds ratio 1.25). They also tend to not visit doctor after suspected bite (52%; p < 0.05; odds ratio 1.97), which may had resulted in more deaths (65%; p < 0.05; odds ratio 1.73) of someone in their near or extended family due to rabies. CONCLUSIONS: Lack of knowledge about the nature of rabies disease and prophylaxis has contributed to increase of rabies related deaths. Inadequate health care facilities and poor attitude of not seeking medical attention after suspected dog bite are the major reasons of rabies related deaths. These findings could help in devising a targeted management strategy and awareness program to control and reduce the incidence of human rabies related deaths in Pakistan.


Assuntos
Doenças do Cão/transmissão , Conhecimentos, Atitudes e Prática em Saúde , Raiva/prevenção & controle , Raiva/veterinária , Adolescente , Adulto , Animais , Mordeduras e Picadas/terapia , Estudos Transversais , Cães , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Paquistão/epidemiologia , Profilaxia Pré-Exposição , Raiva/epidemiologia , Raiva/mortalidade , Inquéritos e Questionários , Adulto Jovem
14.
Parasitol Res ; 119(12): 4277-4280, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33048206

RESUMO

A 12-year old Elo dog was presented with recurring symptoms of conjunctivitis in November 2019. A single whitish nematode was found upon inspection of the eye and identified as a Thelazia callipaeda male. The morphological identification of the eye worm was supported by analysis of a partial cytochrome c oxidase I (cox1) gene sequence. The dog lived in Lower Saxony, northwestern Germany, and had not visited regions known to be endemic for T. callipaeda. This suggests that a local transmission cycle of this zoonotic nematode may exist in Germany.


Assuntos
Doenças do Cão/parasitologia , Infecções por Spirurida/veterinária , Thelazioidea/isolamento & purificação , Animais , Doenças do Cão/transmissão , Cães , Complexo IV da Cadeia de Transporte de Elétrons/genética , Olho/parasitologia , Feminino , Alemanha , Proteínas de Helminto/genética , Masculino , Infecções por Spirurida/parasitologia , Infecções por Spirurida/transmissão , Thelazioidea/classificação , Thelazioidea/citologia , Thelazioidea/genética
15.
Parasitol Res ; 119(9): 3023-3031, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32725320

RESUMO

Hepatozoon canis is a hemoprotozoan organism that infects domestic and wild carnivores throughout much of Europe. The parasite is mainly transmitted through the ingestion of infected ticks containing mature oocysts. The aims of the present survey were to determine the prevalence of H. canis in hunting dogs living in Southern Italy and to assess potential infection risk factors. DNA extracted from whole blood samples, collected from 1433 apparently healthy dogs living in the Napoli, Avellino, and Salerno provinces of Campania region (Southern Italy), was tested by a quantitative real-time polymerase chain reaction (qPCR) assay to amplify H. canis. Furthermore, the investigated dog population was also screened by qPCR for the presence of Ehrlichia canis, a major tick-borne pathogen in Southern Italy, in order to assess possible co-infections. Two hundred dogs were H. canis PCR-positive, resulting in an overall prevalence of 14.0% (CI 12.2-15.9). Breed category (P < 0.0001), hair coat length (P = 0.015), and province of residence (P < 0.0001) represented significant risk factors for H. canis infection. The presence of H. canis DNA was also significantly associated with E. canis PCR positivity (P < 0.0001). Hunting dogs in Campania region (Southern Italy) are frequently exposed to H. canis, and the infection is potentially associated with close contact with wildlife. Further studies are needed to assess the pathogenic potential of H. canis, as well as the epidemiological relationships between hunting dogs and wild animal populations sharing the same habitats in Southern Italy.


Assuntos
Coccidiose/veterinária , Doenças do Cão/parasitologia , Eucoccidiida/isolamento & purificação , Animais , Coccidiose/parasitologia , Coccidiose/transmissão , Doenças do Cão/sangue , Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Cães , Eucoccidiida/genética , Eucoccidiida/fisiologia , Feminino , Itália/epidemiologia , Masculino , Reação em Cadeia da Polimerase , Fatores de Risco , Carrapatos/parasitologia , Carrapatos/fisiologia
16.
Parasitol Res ; 119(3): 1001-1009, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32056024

RESUMO

A retrospective study based on cases of canine dirofilariosis presented to the University of Veterinary Medicine, Vienna or diagnosed by private practitioners throughout Austria, from 1998 to 2018 was conducted to investigate the long-term development and current state of canine dirofilarial infections in Austria. Included in this study were 146 dogs which were tested positive for D. immitis and/or D. repens. The most commonly used diagnostic methods and the probable geographical origins of the infections were evaluated and the treatment protocols applied were compared with each other and with the literature. The results show that most infections were found due to screening for common travel infections using antigen-ELISA or PCR-testing, or by the incidental finding of microfilariae. Remarkably, only 24.3% of all cases presented showed clinical signs indicating canine dirofilariosis. Regarding the origin and travel history of the dogs, thirteen different countries could be identified. The three treatment protocols used showed a similar outcome after 8 months of treatment and minor side effects, which is consistent with the literature. An alarming increase in reported infections with both D. immitis and D. repens in Austria was noted since 2014. The number of documented cases had almost tripled by 2018, raising severe concerns about the threat of it becoming endemic in Austria. Therefore, the existing recommendations in current guidelines regarding canine dirofilariosis should be widely publicised and more strictly enforced. Prophylactic measures for dogs travelling abroad and diagnostic and therapeutic strategies for dogs imported from endemic countries should be obligatorily established throughout Europe, to reduce the risk of further spread of canine filarial infections to non-endemic regions.


Assuntos
Dirofilariose/diagnóstico , Dirofilariose/epidemiologia , Doenças do Cão/diagnóstico , Doenças do Cão/epidemiologia , Microfilárias/isolamento & purificação , Animais , Áustria/epidemiologia , Dirofilariose/tratamento farmacológico , Dirofilariose/transmissão , Doenças do Cão/tratamento farmacológico , Doenças do Cão/transmissão , Cães , Ensaio de Imunoadsorção Enzimática/veterinária , Feminino , Masculino , Microfilárias/classificação , Microfilárias/genética , Microfilárias/imunologia , Reação em Cadeia da Polimerase/veterinária , Estudos Retrospectivos , Viagem
17.
Parasitol Res ; 119(1): 299-315, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31734862

RESUMO

The capability of imidacloprid 10% + flumethrin 4.5% (Seresto®) collars to prevent transmission of Borrelia burgdorferi sensu lato (Bbsl) and Anaplasma phagocytophilum (Ap) by naturally infected ticks was evaluated in two studies with 44 dogs. In each study, one group served as non-treated control, whereas the other groups were treated with the Seresto® collar. All dogs were exposed to naturally Bbsl- and Ap-infected hard ticks (Ixodes ricinus, Ixodes scapularis). In study 1, tick infestation was performed on study day (SD) 63 (2 months post-treatment [p.t.]); in study 2, it was performed on SD 32 (one month p.t.) respectively SD 219 (seven months p.t.). In situ tick counts were performed 2 days after infestation. Tick counts and removals followed 6 (study 1) or 5 days (study 2) later. Blood sampling was performed for the detection of specific Bbsl and Ap antibodies and, in study 1, for the documentation of Ap DNA by PCR. Skin biopsies were examined for Bbsl by PCR and culture (only study 1). The efficacy against Ixodes spp. was 100% at all time points. In study 1, two of six non-treated dogs became infected with Bbsl, and four of six tested positive for Ap; none of the treated dogs tested positive for Bbsl or Ap. In study 2, ten of ten non-treated dogs became infected with Bbsl and Ap; none of the treated dogs tested positive for Bbsl or Ap; 100% acaricidal efficacy was shown in both studies. Transmission of Bbsl and Ap was successfully blocked for up to 7 months.


Assuntos
Acaricidas/uso terapêutico , Transmissão de Doença Infecciosa/veterinária , Doenças do Cão/tratamento farmacológico , Ehrlichiose/veterinária , Doença de Lyme/veterinária , Infestações por Carrapato/veterinária , Acaricidas/administração & dosagem , Anaplasma phagocytophilum/genética , Anaplasma phagocytophilum/imunologia , Anaplasma phagocytophilum/fisiologia , Animais , Anticorpos Antibacterianos/sangue , Vetores Aracnídeos/microbiologia , Borrelia burgdorferi/genética , Borrelia burgdorferi/imunologia , Borrelia burgdorferi/fisiologia , DNA Bacteriano/sangue , Transmissão de Doença Infecciosa/prevenção & controle , Doenças do Cão/prevenção & controle , Doenças do Cão/transmissão , Cães , Ehrlichiose/prevenção & controle , Ehrlichiose/transmissão , Ixodes/microbiologia , Doença de Lyme/prevenção & controle , Doença de Lyme/transmissão , Neonicotinoides/administração & dosagem , Nitrocompostos/administração & dosagem , Piretrinas/administração & dosagem , Infestações por Carrapato/tratamento farmacológico , Infestações por Carrapato/microbiologia , Infestações por Carrapato/parasitologia , Resultado do Tratamento
18.
Korean J Parasitol ; 58(5): 565-569, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33202509

RESUMO

This report describes the first clinical case of a transfusion-associated Mycoplasma haemocanis infection in a dog in Korea. A 6-year-old male Maltese underwent a red blood cell transfusion for idiopathic immune-mediated hemolytic anemia. Eighteen days after the blood transfusion, the recipient's packed cell volume decreased and basophilic organisms were found on erythrocytes. A polymerase chain reaction and sequential analysis showed that both the donor dog and recipient dog had M. haemocanis. Six weeks after doxycycline administration, no organisms were detected and the recipient's anemia had improved.


Assuntos
Anemia Hemolítica Autoimune/terapia , Anemia Hemolítica Autoimune/veterinária , Transfusão de Sangue/veterinária , Doenças do Cão/terapia , Doenças do Cão/transmissão , Doxiciclina/administração & dosagem , Infecções por Mycoplasma/transmissão , Infecções por Mycoplasma/veterinária , Mycoplasma , Reação Transfusional/microbiologia , Reação Transfusional/veterinária , Animais , Doenças do Cão/etiologia , Doenças do Cão/microbiologia , Cães , Masculino , Infecções por Mycoplasma/tratamento farmacológico , Infecções por Mycoplasma/microbiologia , República da Coreia , Resultado do Tratamento
19.
Ann Dermatol Venereol ; 147(5): 373-376, 2020 May.
Artigo em Francês | MEDLINE | ID: mdl-32087981

RESUMO

INTRODUCTION: Capnocytophagacanimorsus (C. canimorsus), a commensal Gram-negative bacillus found in the oral cavity of dogs and cats, is pathogenic for humans, with the most common clinical manifestations being septicemia, meningitis and endocarditis. Herein we report a case of CC bacteremia manifesting as multiple plaques of erythema annulare centrifugum associated with monoarthritis of the knee. PATIENTS AND METHODS: A 66-year-old man consulted for a skin rash and monoarthritis of the right knee with fever following an insect bite on his right hallux. Cutaneous examination revealed numerous erythematous annular plaques on the trunk and limbs with centrifugal extension. Analysis of synovial fluid from the right knee showed an inflammatory liquid with a sterile bacteriological culture and PCR was negative for Borrelia. C. canimorsus bacteria were isolated from blood cultures. 16S RNA PCR performed on the synovial fluid was positive for the same organism. The patient's history revealed that his hallux wound had been licked by his dog. DISCUSSION: C. canimorsus most frequently affects immunosuppressed subjects. Cutaneous signs are seen in half of all cases, most frequently presenting as cellulitis, pathological livedo or thrombotic purpura. We report herein a case of CC bacteremia in an immunocompetent patient manifesting as multiple plaques of erythema annulare centrifugum, an unusual sign, and monoarthritis of one knee.


Assuntos
Artrite/microbiologia , Bacteriemia/complicações , Capnocytophaga , Eritema/microbiologia , Infecções por Bactérias Gram-Negativas/complicações , Articulação do Joelho , Dermatopatias Genéticas/microbiologia , Idoso , Animais , Doenças do Cão/microbiologia , Doenças do Cão/transmissão , Cães , Eritema/patologia , Humanos , Masculino , Dermatopatias Genéticas/patologia
20.
Emerg Infect Dis ; 25(12): 1-4, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31742505

RESUMO

Dogs are the main reservoir of Leishmania infantum and in some countries have been regularly culled as part of government policy to control visceral leishmaniasis. At the 13th Symposium of the Companion Vector-Borne Diseases World Forum in Windsor, UK, March 19-22, 2018, we consolidated a consensus statement regarding the usefulness of dog culling as a means of controlling visceral leishmaniasis. The statement highlighted the futility of culling infected dogs, whether healthy or sick, as a measure to control the domestic reservoir of L. infantum and reduce the risk for visceral leishmaniasis.


Assuntos
Doenças do Cão/epidemiologia , Doenças do Cão/prevenção & controle , Leishmaniose/veterinária , Animais , Reservatórios de Doenças/veterinária , Doenças do Cão/parasitologia , Doenças do Cão/transmissão , Cães , Leishmaniose Visceral/veterinária
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