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1.
Vet Rec ; 195(1): 10-11, 2024 Jul 06.
Artículo en Inglés | MEDLINE | ID: mdl-38967165

RESUMEN

Georgina Mills discusses how Google Street View could help in counting dogs in Peru to support approaches to rabies management.


Asunto(s)
Rabia , Perros , Animales , Rabia/veterinaria , Rabia/prevención & control , Perú , Enfermedades de los Perros , Sistemas de Información Geográfica , Humanos
2.
Sci Rep ; 14(1): 15910, 2024 Jul 10.
Artículo en Inglés | MEDLINE | ID: mdl-38987306

RESUMEN

Mass vaccinations are crucial public health interventions for curbing infectious diseases. Canine rabies control relies on mass dog vaccination campaigns (MDVCs) that are held annually across the globe. Dog owners must bring their pets to fixed vaccination sites, but sometimes target coverage is not achieved due to low participation. Travel distance to vaccination sites is an important barrier to participation. We aimed to increase MDVC participation in silico by optimally placing fixed-point vaccination locations. We quantified participation probability based on walking distance to the nearest vaccination site using regression models fit to participation data collected over 4 years. We used computational recursive interchange techniques to optimally place fixed-point vaccination sites and compared predicted participation with these optimally placed vaccination sites to actual locations used in previous campaigns. Algorithms that minimized average walking distance or maximized expected participation provided the best solutions. Optimal vaccination placement is expected to increase participation by 7% and improve spatial evenness of coverage, resulting in fewer under-vaccinated pockets. However, unevenness in workload across sites remained. Our data-driven algorithm optimally places limited resources to increase overall vaccination participation and equity. Field evaluations are essential to assess effectiveness and evaluate potentially longer waiting queues resulting from increased participation.


Asunto(s)
Enfermedades de los Perros , Rabia , Zoonosis , Animales , Rabia/prevención & control , Rabia/veterinaria , Rabia/epidemiología , Zoonosis/prevención & control , Zoonosis/epidemiología , Humanos , Perros , Enfermedades de los Perros/prevención & control , Enfermedades de los Perros/epidemiología , Vacunas Antirrábicas/administración & dosificación , Vacunas Antirrábicas/inmunología , Vacunación , Vacunación Masiva/métodos , Vacunación Masiva/estadística & datos numéricos , Algoritmos , Epidemias/prevención & control
3.
Vet Med Sci ; 10(4): e1514, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38932654

RESUMEN

Rabies is a fatal and zoonotic disease that remains endemic in Iran. In this article, rabies in a striped hyena (Hyaena hyaena) in Qazvin Province, Iran, was found when being hunted for using the genitals for traditional thoughts of the people. The fluorescent antibody technique confirmed rabies infection in the brain sample, and vaccination was done for injured hunter.


Asunto(s)
Rabia , Animales , Irán/epidemiología , Rabia/veterinaria , Rabia/epidemiología , Hyaenidae/virología , Masculino , Femenino
4.
Spat Spatiotemporal Epidemiol ; 49: 100647, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38876560

RESUMEN

A factor constraining the elimination of dog-mediated human rabies is limited information on the size and spatial distribution of free-roaming dog populations (FRDPs). The aim of this study was to develop a statistical model to predict the size of free-roaming dog populations and the spatial distribution of free-roaming dogs in urban areas of Nepal, based on real-world dog census data from the Himalayan Animal Rescue Trust (HART) and Animal Nepal. Candidate explanatory variables included proximity to roads, building density, specific building types, human population density and normalised difference vegetation index (NDVI). A multivariable Poisson point process model was developed to estimate dog population size in four study locations in urban Nepal, with building density and distance from nearest retail food establishment or lodgings as explanatory variables. The proposed model accurately predicted, within a 95 % confidence interval, the surveyed FRDP size and spatial distribution for all four study locations. This model is proposed for further testing and refinement in other locations as a decision-support tool alongside observational dog population size estimates, to inform dog health and public health initiatives including rabies elimination efforts to support the 'zero by 30' global mission.


Asunto(s)
Enfermedades de los Perros , Densidad de Población , Rabia , Animales , Perros , Nepal/epidemiología , Rabia/epidemiología , Rabia/veterinaria , Rabia/prevención & control , Enfermedades de los Perros/epidemiología , Humanos , Población Urbana/estadística & datos numéricos , Análisis Espacial , Modelos Estadísticos
5.
J Vet Sci ; 25(3): e46, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38834514

RESUMEN

IMPORTANCE: Rabies is a neglected tropical viral disease most often transmitted through the bite of an infected animal. OBJECTIVE: This study assessed the level of knowledge, attitudes, and practices of the Shone Town community toward rabies. METHODS: A survey-based cross-sectional study was conducted in Shone town, Ethiopia, from November 2022 to April 2023. Woreda was selected purposefully, while Kebeles and the study populations were selected by simple random sampling. Four hundred and sixteen respondents were interviewed using a semi-structured questionnaire. RESULTS: All respondents had heard about rabies from different sources, with the majority hearing from informal sources (62%). Approximately 51.9%, 0.7%, and 47.4% of individuals were aware of saliva contact, rabid animal bites, and both as means of transmission, respectively. The survey showed that 64.4% of participants knew the 100% fatal nature of rabies once the clinical signs developed, and 35.6% did not. Approximately 51.4% of respondents agreed that killing stray dogs was an effective method for rabies prevention. In this study, 72.6% of the respondents had contact with pets, and 36.8% of the interviewees had vaccinated their dogs. Only the educational level (p = 0.03) was associated with knowledge of the transmission route. Age (p = 0.04) and educational level (p = 0.01) had a statistically significant association with knowledge of the risk of not vaccinating dogs. CONCLUSIONS AND RELEVANCE: A lack of formal education in the communities, low levels of education, and the majority of respondents acquiring their knowledge from unofficial sources are important contributors to the low levels of awareness.


Asunto(s)
Enfermedades de los Perros , Conocimientos, Actitudes y Práctica en Salud , Rabia , Rabia/veterinaria , Rabia/prevención & control , Rabia/epidemiología , Etiopía/epidemiología , Adulto , Humanos , Animales , Masculino , Estudios Transversales , Femenino , Persona de Mediana Edad , Factores de Riesgo , Perros , Encuestas y Cuestionarios , Enfermedades de los Perros/prevención & control , Enfermedades de los Perros/epidemiología , Enfermedades de los Perros/virología , Adulto Joven , Adolescente , Vacunas Antirrábicas/administración & dosificación , Anciano
6.
Euro Surveill ; 29(18)2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38699901

RESUMEN

In March 2024, the first ever human case of rabies, following a dog bite, was detected in Timor-Leste. This paper briefly discusses the circumstances of transmission, clinical presentation, palliative care of the case and public health measures taken. Timor-Leste was previously considered rabies-free. Any person who is bitten or scratched by an animal that could potentially transmit rabies virus (especially dogs, bats, monkeys or cats) in Timor-Leste should be assessed for consideration of provision of rabies post-exposure prophylaxis.


Asunto(s)
Mordeduras y Picaduras , Profilaxis Posexposición , Virus de la Rabia , Rabia , Animales , Gatos , Perros , Femenino , Humanos , Mordeduras y Picaduras/virología , Quirópteros/virología , Rabia/diagnóstico , Rabia/veterinaria , Rabia/transmisión , Vacunas Antirrábicas/administración & dosificación , Virus de la Rabia/aislamiento & purificación , Timor Oriental/epidemiología , Adolescente
7.
J Wildl Dis ; 60(3): 572-583, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38742383

RESUMEN

The Arctic fox (Vulpes lagopus) is the primary infection reservoir of Arctic rabies, the dynamics of which are poorly understood and subject to significant spatiotemporal variation. Although rabies presence has been documented in the region since the mid-19th century, there is currently no evidence of rabies impacting Arctic fox population size. Under the influence of climate change in a rapidly evolving Arctic ecosystem, alterations in transmission dynamics are predicted, with implications for this species. Concurrently, the World Health Organization leads the United Against Rabies collective in the aim of elimination of dog-mediated rabies by 2030, and although efforts have justifiably been directed to tropical regions, elimination will require a good understanding of rabies in the Arctic. Therefore, this review aimed to provide an overview of current Arctic rabies understanding, while identifying the key knowledge gaps. The review covered spatiotemporal trends in rabies populations, population dynamics of the host species, and current theories about Arctic rabies persistence. It is still unclear how Arctic rabies can persist under low host densities, which has led to several hypotheses in recent years. Creation of high animal density "hotspots" caused by heterogenic fox distribution and multispecies congregations in response to food availability, extensive Arctic fox migration patterns, and the potential evolution to a less lethal variant of rabies may all be part of the explanation. Evidence for these theories by using recent genetic and modeling studies was evaluated within the review. There is currently insufficient evidence about the efficacy and feasibility of vaccines against Arctic rabies. Key knowledge gaps need addressing to enable future control campaigns.


Asunto(s)
Zorros , Rabia , Zorros/virología , Animales , Rabia/veterinaria , Rabia/epidemiología , Regiones Árticas/epidemiología , Animales Salvajes/virología
8.
Zoonoses Public Health ; 71(5): 600-608, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38706119

RESUMEN

BACKGROUND: Rabies virus (RABV) is the etiologic agent of rabies, a fatal brain disease in mammals. Rabies circulation has historically involved the dog has the main source of human rabies worldwide. Nevertheless, in Colombia, cats (Felis catus) have become a relevant species in the epidemiology of rabies. AIMS: To characterize rabies cases in humans in Colombia in the last three decades in the context of the epidemiology of the aggressor animal. MATERIALS AND METHODS: We conducted a retrospective longitudinal epidemiological study of human rabies caused by cats' aggression, collecting primary and secondary information. Variables considered included the demography of the patient, symptoms, information about the aggressor animal as the source of infection and the viral variant identified. RESULTS: We found that the distribution of rabies incidence over the years has been constant in Colombia. Nevertheless, between 2003 and 2012 a peak of cases occurred in rural Colombia where cats were the most frequent aggressor animal reported. Most cats involved in aggression were unvaccinated against rabies. Cat's clinical signs at the time of the report of the human cases included hypersalivation and changes in behaviour. Human patients were mostly children and female and the exposure primarily corresponded to bite and puncture lacerations in hands. The RABV lineage detected in most cases corresponded to variant 3, linked to the common vampire bat (Desmodus rotundus). The geographical presentation of cat borne RABV in humans occurred along the Andes mountains, epidemiologically known as the rabies red Andean corridor. DISCUSSION: By finding cats as the primary source of rabies spillover transmission in Colombia, this report highlights the importance of revising national rabies control and prevention protocol in countries in the Andes region. CONCLUSION: Our results demonstrate that rabies vaccination for outdoor cats needs to prioritize to reduce the number of rabies-related human deaths.


Asunto(s)
Enfermedades de los Gatos , Virus de la Rabia , Rabia , Rabia/epidemiología , Rabia/veterinaria , Animales , Gatos , Humanos , Colombia/epidemiología , Masculino , Femenino , Enfermedades de los Gatos/epidemiología , Enfermedades de los Gatos/virología , Estudios Retrospectivos , Virus de la Rabia/aislamiento & purificación , Niño , Adolescente , Adulto , Preescolar , Mordeduras y Picaduras/epidemiología , Adulto Joven , Persona de Mediana Edad , Estudios Longitudinales , Zoonosis/epidemiología , Incidencia
9.
J Vet Diagn Invest ; 36(4): 554-559, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38745456

RESUMEN

We performed a retrospective study of all case submissions for the rabies virus (RABV) direct fluorescent antibody test (DFAT) requested of the Tifton Veterinary Diagnostic and Investigational Laboratory (Tifton, GA, USA) between July 2010 and June 2021. Submitted were 792 samples from 23 animal species from 89 counties in Georgia, and 4 neighboring counties in Florida, 1 in South Carolina, and 1 in Alabama. In 13 (1.6%) cases, the DFAT result was inconclusive; 779 (98.4%) cases had a conclusive (positive or negative) test result. Of these 779 cases, 79 (10.1%) tested positive across 10 species. The remaining 700 (89.9%) cases were negative. The main reason for submission for RABV testing was human exposure to a potentially rabid animal in 414 (52.3%) cases. Among the 79 positive cases, 74 (93.7%) involved wildlife; raccoons (51 cases; 68.9%) were the primary host confirmed with RABV infection, followed by skunk and fox (8 cases each; 10.8%), bobcat (5 cases; 6.8%), and bats (2 cases; 2.7%). Only 5 domestic animals (6.3% of the positive cases) tested positive during our study period; one from each of the bovine, canine, caprine, equine, and feline species. Hence, the sylvatic cycle plays the predominant role in circulating RABV infection in our study area.


Asunto(s)
Animales Domésticos , Animales Salvajes , Rabia , Animales , Rabia/veterinaria , Rabia/epidemiología , Estudios Retrospectivos , Animales Salvajes/virología , Animales Domésticos/virología , Virus de la Rabia/aislamiento & purificación , Técnica del Anticuerpo Fluorescente Directa/veterinaria
10.
Res Vet Sci ; 174: 105278, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38759348

RESUMEN

Little research is available on acquired immunity to rabies in dogs and cats from Central Africa, particularly regarding the legal movements of pets. Movement of domestic animals from rabies-endemic countries like Cameroon to rabies free areas poses one of the main risks for rabies introduction into rabies-free areas. Thus, the aim of this study was to assess the effect of various risk factors on rabies vaccine efficacy in Cameroonian. Since the dependent variable, rabies neutralizing titres, were censored from above (right-censoring), Generalized Additive Model for Location, Scale and Shape (GAMLSS) was used in the analysis. Overall, 85.7% of dogs and 100% of cats had titres greater than or equal to 0.5 IU/mL, which is considered protective. Additionally, compared to cats, the value of the rabies-neutralizing serum titres in dogs was on average smaller by 2.3 IU/mL. For each additional year of age, the value of the rabies-neutralizing serum titre, on average, increased by approximately 0.14 IU/mL. Finally, for each 30 additional days between the date of the last rabies vaccination and the date of the sampling, the value the rabies neutralizing titre, on average, decreased by approximately 0.10 IU/mL, given the species and age at sampling were equivalent. These results are useful for assessing risk and improving surveillance to prevent the introduction of rabies into a country via the international movement of animals.


Asunto(s)
Enfermedades de los Gatos , Enfermedades de los Perros , Vacunas Antirrábicas , Rabia , Animales , Perros , Gatos , Vacunas Antirrábicas/inmunología , Vacunas Antirrábicas/administración & dosificación , Enfermedades de los Perros/prevención & control , Enfermedades de los Perros/inmunología , Enfermedades de los Gatos/prevención & control , Enfermedades de los Gatos/inmunología , Enfermedades de los Gatos/virología , Rabia/prevención & control , Rabia/veterinaria , Factores de Riesgo , Camerún , Viaje , Masculino , Femenino , Vacunación/veterinaria
11.
PLoS One ; 19(5): e0302690, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38722982

RESUMEN

BACKGROUND: Rabies virus (RABV; species Lyssavirus rabies) is causing one of the oldest zoonotic diseases known to mankind, leading to fatal encephalomyelitis in animals and humans. Despite the existence of safe and effective vaccines to prevent the disease, an estimated 99% of human rabies deaths worldwide are caused by dog-mediated rabies with children at the highest risk of infection. Rabies has been endemic in Madagascar for over a century, yet there has been little research evaluating local knowledge and practices impacting on the rabies control and prevention. Thus, this study was undertaken to better understand the dog ecology including canine vaccine coverage and to assess knowledge and practices of dog owners and veterinarians. METHODOLOGY: A cross-sectional study was conducted among 123 dog-owning households in thirteen fokontanys in Mahajanga from July 4 to September 13, 2016. Single and multi-member dog-owning households in the study area on the day of the interview were eligible for inclusion and purposively selected with the support of a local guide. The survey included a household questionnaire capturing information on the dog's demographics, husbandry practices, knowledge and practices towards rabies and its control measures; the dog ecology questionnaire collected dog characteristics, vaccination status and husbandry practices. All households that reported a dog bite incident, were invited to participate in a dog bite questionnaire. In addition, direct observations of roaming dogs were conducted to assess dog population demographics and to document behavioural characteristics. Two veterinarians were purposively selected and took part in an interview during the survey period, providing information on rabies control activities, including dog-care practices in the area. Descriptive and inferential data analyses were performed using Epi Info version 7.1.5.0 (CDC Atlanta, USA). RESULTS: We recorded a total of 400 dogs, of which 338 (84.5%) were owned amongst 123 households. More than half (67.8%) of owned dogs were between 1 to 5 years old and 95.6% were kept for guarding purposes. 45% of the surveyed dogs had free access to roam outside the premises. The majority (85.4%) of dog owners were knowledgeable that a dog bite could potentially transmit RABV to humans. 19 dog bites were reported and of these 73.6% were caused by the owner's or a neighbour's dog. In 6 of the 19 cases, children between 7 and 15 years of age were the victims. Dog vaccination coverage against rabies was 34% among owned dogs. Of the participants aware of a veterinarian, the majority (55/82) indicated that they accessed veterinarian services at irregular intervals. The main obstacles to vaccinations cited by dog owners were limited financial resources and difficulty accessing veterinary care. CONCLUSION: This study contributes to enhanced understanding of the dog ecology including canine vaccine coverage as well as knowledge and practices of dog owners in Madagascar. Most dogs in the study area were accessible for preventive vaccination through their owners, however only one third of the investigated canine population was vaccinated against rabies. Concerted national efforts towards rabies prevention and control should aim to address financial challenges and access to veterinary services.


Asunto(s)
Enfermedades de los Perros , Vacunas Antirrábicas , Rabia , Perros , Animales , Rabia/prevención & control , Rabia/veterinaria , Rabia/epidemiología , Madagascar/epidemiología , Enfermedades de los Perros/prevención & control , Enfermedades de los Perros/virología , Enfermedades de los Perros/epidemiología , Humanos , Vacunas Antirrábicas/administración & dosificación , Estudios Transversales , Masculino , Femenino , Conocimientos, Actitudes y Práctica en Salud , Encuestas y Cuestionarios , Adulto , Cobertura de Vacunación/estadística & datos numéricos , Persona de Mediana Edad , Ecología , Virus de la Rabia/inmunología
12.
PLoS Negl Trop Dis ; 18(5): e0012154, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38713728

RESUMEN

Rabies remains a burden in Africa, disproportionately affecting the most vulnerable despite the availability of effective vaccines. Nigeria, the most populous African country, needs rapid disease control actions and commitments to achieve the goal of eliminating dog-mediated rabies by 2030. Surveillance is an essential element of effective disease control strategies. This study examined the current state of operationality of the rabies surveillance system for early case detection and management in Gombe state, Nigeria, through a One Health lens. It further examined the barriers impeding the effectiveness of the surveillance based on the perception of surveillance workers. Qualitative and quantitative methods were used to assess the structure of the system and its functioning. Data on dog bite and rabid cases obtained from the veterinary services in Gombe state were analysed descriptively. A total of 13 key informants were interviewed using a semi-structured interview guide. Qualitative data were analysed using thematic analysis to explore in depth the factors that influenced the operationality of the system. A total of 157 potential human exposures to rabies were identified in this study, out of which two people reportedly died at the health facility after showing symptoms highly suggestive of rabies. In terms of rabies surveillance and control, cross-sectoral collaboration was found between the human health and veterinary sectors for risk assessment of potential rabies exposures and its management. Some identified factors affecting the operations of the surveillance were inadequate funding, lack of infrastructure, lack of feedback from higher authorities and insufficient knowledge of rabies prevention and management. To improve the capacity for case detection and management within the state, the appropriate authorities may focus on increasing awareness about the disease to the populace to increase the number of cases identified by the system, employ more workers and strengthen the surveillance capability of existing workers.


Asunto(s)
Rabia , Rabia/epidemiología , Rabia/prevención & control , Rabia/veterinaria , Nigeria/epidemiología , Humanos , Animales , Perros , Enfermedades de los Perros/epidemiología , Enfermedades de los Perros/prevención & control , Enfermedades de los Perros/virología , Femenino , Masculino , Adulto , Mordeduras y Picaduras/epidemiología , Persona de Mediana Edad , Monitoreo Epidemiológico , Adulto Joven , Adolescente , Salud Única
13.
J Virol Methods ; 327: 114948, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38718900

RESUMEN

Rabies, a fatal zoonotic viral disease affecting mammals, including humans, remains a significant global health concern, particularly in low-income countries. The disease, primarily transmitted through infected animal saliva, prompts urgent diagnosis for timely post-exposure prophylaxis (PEP). The gold standard diagnostic test, direct fluorescent antibody test (dFAT), while sensitive, suffers from limitations such as subjective interpretation and high costs. As a confirmatory technique, the LN34 Pan-Lyssavirus RT-qPCR assay has emerged as a promising tool for universal Lyssavirus detection. This study evaluated its performance using 130 rabies virus isolates representing eleven Brazilian variants and 303 clinical samples from surveillance operations. The LN34 assay demonstrated 100% sensitivity and 98% specificity compared to dFAT. Additionally, it detected all samples, including those missed by dFAT, indicating superior sensitivity. The assay's specificity was confirmed through Sanger nucleotide sequencing, with only a minimal false-positive rate. Comparative analysis revealed higher accuracy and concordance with dFAT than traditional rabies tissue culture infection tests (RTCIT). False-negative RTCIT results were attributed to low viral load or suboptimal sampling. These findings underscore the LN34 assay's utility as a confirmatory technique, enhancing rabies surveillance and control in Brazil. Its widespread adoption could significantly improve diagnostic sensitivity, crucial for effective PEP and public health interventions.


Asunto(s)
Virus de la Rabia , Rabia , Reacción en Cadena en Tiempo Real de la Polimerasa , Sensibilidad y Especificidad , Rabia/diagnóstico , Rabia/veterinaria , Rabia/virología , Brasil , Virus de la Rabia/genética , Virus de la Rabia/aislamiento & purificación , Virus de la Rabia/clasificación , Humanos , Animales , Reacción en Cadena en Tiempo Real de la Polimerasa/métodos , Lyssavirus/genética , Lyssavirus/aislamiento & purificación , Lyssavirus/clasificación , ARN Viral/genética , Carga Viral
14.
J Wildl Dis ; 60(3): 703-713, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38679922

RESUMEN

Rabies is a highly virulent viral disease that has been associated with large-scale population declines of the endangered African wild dog (Lycaon pictus). Rabies vaccination may be a valuable conservation tool in this species, but studies indicate that a single dose does not always confer protective immunity. We examined 47 serum samples from 22 captive African wild dogs (sampled opportunistically for other purposes) to assess whether serum antibody levels after vaccination correlated with the number of doses received and whether other factors affected outcomes. Results of the fluorescent antibody virus neutralization test showed that median antibody titers were 0.085 IU/mL prevaccination, 0.660 IU/mL after a single vaccination, and 22.150 IU/mL after a booster vaccination. Antibody titers above 0.5 IU/mL, internationally accepted as the threshold for seroconversion, were found in none of the samples taken prevaccination, 66.67% of samples taken after primary vaccination, and 90.90% of samples collected after booster vaccination. This study illustrates the probable protective benefit a rabies booster vaccination may provide in African wild dogs and serves as a basis for future research to improve vaccination protocols contributing to the conservation of this endangered species.


Asunto(s)
Anticuerpos Antivirales , Canidae , Inmunización Secundaria , Vacunas Antirrábicas , Rabia , Animales , Vacunas Antirrábicas/inmunología , Vacunas Antirrábicas/administración & dosificación , Rabia/prevención & control , Rabia/veterinaria , Anticuerpos Antivirales/sangre , Inmunización Secundaria/veterinaria , Animales Salvajes , Femenino , Masculino , Vacunación/veterinaria
15.
J Wildl Dis ; 60(3): 745-752, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38685759

RESUMEN

Wildlife translocation and cross-species transmission can impede control and elimination of emerging zoonotic diseases. Tracking the geographic origin of both host and virus (i.e., translocation versus local infection) may help determine the most effective response when high-risk cases of emerging pathogens are identified in wildlife. In May 2022, a coyote (Canis latrans) infected with the raccoon (Procyon lotor) rabies virus variant (RRV) was collected in Lewis County, West Virginia, USA, an area free from RRV. We applied host population genomics and RRV phylogenetic analyses to determine the most likely geographic origin of the rabid coyote. Coyote genomic analyses included animals from multiple eastern states bordering West Virginia, with the probable origin of the rabid coyote being the county of collection. The RRV phylogenetic analyses included cases detected from West Virginia and neighboring states, with most similar RRV sequences collected in a county 80 km to the northeast, within the oral rabies vaccination zone. The combined results suggest that the coyote was infected in an RRV management area and carried the RRV to Lewis County, a pattern consistent with coyote local movement ecology. Distant cross-species transmission and subsequent host movement presents a low risk for onward transmission in raccoon populations. This information helped with emergency response decision-making, thereby saving time and resources.


Asunto(s)
Coyotes , Filogenia , Virus de la Rabia , Rabia , Animales , Coyotes/virología , West Virginia/epidemiología , Rabia/veterinaria , Rabia/epidemiología , Virus de la Rabia/genética , Virus de la Rabia/aislamiento & purificación , Virus de la Rabia/clasificación , Mapaches/virología , Animales Salvajes
16.
Zoonoses Public Health ; 71(5): 515-525, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38659171

RESUMEN

AIMS: The importation of rabid animals poses a continual threat to rabies freedom in the European Union (EU). Following the Russian invasion of Ukraine in 2022, the European Commission eased the rules on companion animal importations for Ukrainian refugees through derogations to the EU Pet Travel Scheme (EU PETS). As Ukraine remains endemic for canine rabies, this paper aimed to quantitatively assess whether the change in regulations affected the risk of rabies introduction to the EU. METHOD AND RESULTS: Transmission pathways for both EU PETS and derogations to this scheme were considered, as well as the scenarios of 100% compliance and reduced compliance within both schemes. Stochastic modelling was performed via a Monte Carlo simulation to calculate the median and 95% confidence intervals of the annual risk of rabies entry and the years between rabies entries into the EU. Following 100% compliance, the derogation scheme posed a significantly lower risk at a value of 3.63 × 10-3 (CI 95% 1.18 × 10-3-9.34 × 10-3) rabies entries per year in comparison to EU PETS where the risk was 4.25 × 10-2 (CI 95% 1.44 × 10-2-9.81 × 10-2). Despite a significantly lower risk as compared to EU PETS under 100% compliance, the derogation scheme was more sensitive to a reduction in compliance which resulted in a 74-fold increase in risk. Given this, even under reduced compliance, the annual risk remained lower under the derogation scheme, although this was not statistically significant. CONCLUSION: The findings of this study suggest that a 4-month period of quarantine, as modelled for the derogation scenario, could reduce the annual risk of rabies entry. This scheme may present a viable solution for the management of companion animal influxes in future crises.


Asunto(s)
Unión Europea , Rabia , Rabia/veterinaria , Rabia/epidemiología , Rabia/transmisión , Rabia/prevención & control , Animales , Ucrania/epidemiología , Humanos , Medición de Riesgo , Perros , Federación de Rusia/epidemiología , Conflictos Armados , Enfermedades de los Perros/epidemiología , Enfermedades de los Perros/transmisión , Enfermedades de los Perros/virología , Mascotas
17.
J Vet Diagn Invest ; 36(4): 522-528, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38653733

RESUMEN

Rabies virus (RABV; Lyssavirus rabies) is a neurotropic virus that can be transmitted to mammals by the hematophagous bat Desmodus rotundus. An accurate, accessible method for the detection of RABV in cattle is necessary in Paraguay; thus, we evaluated the detection of RABV using 4 techniques: fluorescent antibody test (FAT), immunochromatography rapid detection test (RDT; Anigen Rapid Rabies Ag test kit; Bionote), a reverse-transcription PCR (RT-PCR) assay, and histologic lesions in different portions of the CNS of 49 Paraguayan cattle to determine the most sensitive and specific technique. By FAT and RDT, 15 of 49 (31%) samples were positive. By RT-PCR amplification of N and G genes, 13 of 49 (27%) and 12 of 49 (25%) were positive, respectively. RDT had high agreement with FAT (kappa = 1); sensitivity was 100% (95% CI: 97-100%) and specificity was 100% (95% CI: 99-100%). The amplification of the N and G genes resulted in substantial agreement (kappa of 0.9 and 0.8, respectively) compared with FAT, and the sensitivity and specificity of the N gene were 87% (95% CI: 66-100%) and 100% (95% CI: 98-100%), respectively, and those of the G gene were 80% (95% CI: 56-100%) and 100% (95% CI: 98-100%), respectively. Histologic lesions observed were lymphoplasmacytic meningoencephalitis, gliosis, and neuronophagia. The agreement observed between the FAT and RDT tests suggests that RDT is an accurate tool for the detection of RABV. Histopathology can be used to confirm lesions caused by RABV and to rule out other conditions; the RT-PCR assay is useful for molecular epidemiology studies.


Asunto(s)
Enfermedades de los Bovinos , Virus de la Rabia , Rabia , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Sensibilidad y Especificidad , Animales , Rabia/veterinaria , Rabia/diagnóstico , Rabia/virología , Bovinos , Paraguay , Virus de la Rabia/aislamiento & purificación , Virus de la Rabia/genética , Enfermedades de los Bovinos/virología , Enfermedades de los Bovinos/diagnóstico , Enfermedades de los Bovinos/patología , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/veterinaria , Técnica del Anticuerpo Fluorescente/veterinaria
18.
PLoS Negl Trop Dis ; 18(4): e0012089, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38635851

RESUMEN

Rabies control remains challenging in low and middle-income countries, mostly due to lack of financial resources, rapid turnover of dog populations and poor accessibility to dogs. Rabies is endemic in Cambodia, where no national rabies vaccination program is implemented. The objective of this study was to assess the short and long-term vaccination-induced immunity in Cambodian dogs under field conditions, and to propose optimized vaccination strategies. A cohort of 351 dogs was followed at regular time points following primary vaccination only (PV) or PV plus single booster (BV). Fluorescent antibody virus neutralization test (FAVNT) was implemented to determine the neutralizing antibody titer against rabies and an individual titer ≥0·5 IU/mL indicated protection. Bayesian modeling was used to evaluate the individual duration of protection against rabies and the efficacy of two different vaccination strategies. Overall, 61% of dogs had a protective immunity one year after PV. In dogs receiving a BV, this protective immunity remained for up to one year after the BV in 95% of dogs. According to the best Bayesian model, a PV conferred a protective immunity in 82% of dogs (95% CI: 75-91%) for a mean duration of 4.7 years, and BV induced a lifelong protective immunity. Annual PV of dogs less than one year old and systematic BV solely of dogs vaccinated the year before would allow to achieve the 70% World Health Organization recommended threshold to control rabies circulation in a dog population in three to five years of implementation depending on dog population dynamics. This vaccination strategy would save up to about a third of vaccine doses, reducing cost and time efforts of mass dog vaccination campaigns. These results can contribute to optimize rabies control measures in Cambodia moving towards the global goal of ending human death from dog-mediated rabies by 2030.


Asunto(s)
Anticuerpos Antivirales , Teorema de Bayes , Enfermedades de los Perros , Vacunas Antirrábicas , Rabia , Vacunación , Perros , Animales , Rabia/prevención & control , Rabia/veterinaria , Rabia/inmunología , Rabia/epidemiología , Cambodia/epidemiología , Vacunas Antirrábicas/inmunología , Vacunas Antirrábicas/administración & dosificación , Enfermedades de los Perros/prevención & control , Enfermedades de los Perros/inmunología , Enfermedades de los Perros/virología , Enfermedades de los Perros/epidemiología , Anticuerpos Antivirales/sangre , Vacunación/veterinaria , Masculino , Femenino , Anticuerpos Neutralizantes/sangre , Virus de la Rabia/inmunología
19.
Emerg Infect Dis ; 30(5): 1039-1042, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38666690

RESUMEN

In Latin America, rabies virus has persisted in a cycle between Desmodus rotundus vampire bats and cattle, potentially enhanced by deforestation. We modeled bovine rabies virus outbreaks in Costa Rica relative to land-use indicators and found spatial-temporal relationships among rabies virus outbreaks with deforestation as a predictor.


Asunto(s)
Enfermedades de los Bovinos , Brotes de Enfermedades , Virus de la Rabia , Rabia , Animales , Costa Rica/epidemiología , Rabia/epidemiología , Rabia/veterinaria , Bovinos , Enfermedades de los Bovinos/epidemiología , Enfermedades de los Bovinos/virología , Conservación de los Recursos Naturales , Quirópteros/virología , Historia del Siglo XXI
20.
Prev Vet Med ; 226: 106188, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38513566

RESUMEN

Rabies, a globally distributed and highly lethal zoonotic neglected tropical disease, has a significant impact in South America. In Ecuador, animal rabies cases are primarily linked to livestock, and hematophagous bats play a crucial role in disease transmission. This study aims to identify temporal trends, spatial patterns, and risk factors for animal rabies in Ecuador between 2014 and 2019. Epidemiological survey reports from the official Animal Rabies Surveillance Program of the Phyto and Zoosanitary Regulation and Control Agency of Ecuador (AGROCALIDAD) were used. The Animal Rabies Surveillance Program from AGROCALIDAD consists of an official passive surveillance program that receives reports from farmers or individuals (both trained or untrained) who have observed animals with neurological clinical signs and lesions compatible with bat bites, or who have seen or captured bats on their farms or houses. Once this report is made, AGROCALIDAD personnel is sent for field inspection, having to confirm the suspicion of rabies based on farm conditions and compatibility of signs. AGROCALIDAD personnel collect samples from all suspicious animals, which are further processed and analyzed using the Direct Fluorescent Antibody (DFA) test for rabies confirmatory diagnosis. In this case, study data comprised 846 bovine farms (with intra-farm sample sizes ranging from 1 to 16 samples) located in different ecoregions of Ecuador; out of these, 397 (46.93%) farms tested positive for animal rabies, revealing six statistically significant spatial clusters. Among these clusters, three high-risk areas were identified in the southeast of Ecuador. Seasonality was confirmed by the Ljung-Box test for both the number of cases (p < 0.001) and the positivity rate (p < 0.001). The Pacific Coastal lowlands and Sierra regions showed a lower risk of positivity compared to Amazonia (OR = 0.529; 95% CI = 0.318 - 0.883; p = 0.015 and OR = 0.633; 95% CI = 0.410 - 0.977; p = 0.039, respectively). The breeding of non-bovine animal species demonstrated a lower risk of positivity to animal rabies when compared to bovine (OR = 0.145; 95% CI = 0.062 - 0.339; p < 0.001). Similarly, older animals exhibited a lower risk (OR = 0.974; 95% CI = 0.967 - 0.981; p < 0.001). Rainfall during the rainy season was also found to decrease the risk of positivity to animal rabies (OR = 0.996; 95% CI = 0.995 - 0.998; p < 0.001). This study underscores the significance of strengthening the national surveillance program for the prevention and control of animal rabies in Ecuador and other countries facing similar epidemiological, social, and geographical circumstances.


Asunto(s)
Enfermedades de los Bovinos , Quirópteros , Virus de la Rabia , Rabia , Animales , Bovinos , Enfermedades de los Bovinos/epidemiología , Quirópteros/fisiología , Ecuador/epidemiología , Ganado , Rabia/epidemiología , Rabia/veterinaria , Rabia/prevención & control , Factores de Riesgo
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