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1.
Trop Anim Health Prod ; 54(1): 38, 2022 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-34997337

RESUMO

This study shows the effectiveness of diet containing Trachyspermum copticum (TC), Majorana hortensis Minch (MH), Stachys lavandulifolia Vahl (SL), and Zingiber officinale (ZO) on the growth performance, biochemical factors, and qualitative agents of eggs of Japanese quail (Coturnix japonica) and their immune responses against Newcastle and Avian Influenza vaccine. For this prepose, 675 quails were divided into 9 groups with three replicates and fed with different treatment diets (basic diet with no supplements (control treatment diet) and diets supplemented with one of two levels (0.5 and 2%) of each plant powders). Data showed that the use of TC 2% increased the Haugh unit significantly (P < 0.05) compared with the control (P < 0.05). At the end of the experiment, shell weight (g) and shell thickness were also remarkably enhanced in treated groups compared with the control group. Moreover, the findings of this study showed the thiobarbituric acid and yolk cholesterol level reduced remarkably (P < 0.05) in the MH and SL groups without significant adverse effect on albumen protein (%) and total protein (%) level. In this study, TC-2%, ZO-2%, and SL-2% all increased the antibody titers against avian influenza. The use of a diet containing MH-2% increased Newcastle disease in Japanese quail in comparison to both controls and different levels of other medicinal herb powders. Based on these results, using these four herbal plant powders in Japanese quail, diets could positively affect their egg qualitative and biochemical factors.


Assuntos
Vacinas contra Influenza , Influenza Aviária , Ração Animal/análise , Animais , Coturnix , Dieta/veterinária , Suplementos Nutricionais , Imunidade , Óvulo , Codorniz
2.
Curr Microbiol ; 79(2): 57, 2022 Jan 04.
Artigo em Inglês | MEDLINE | ID: mdl-34982247

RESUMO

Leptospirosis is a worldwide zoonosis and a serious public health threat in tropical and subtropical areas. The etiologic agents of leptospirosis are pathogenic spirochetes from the genus Leptospira. In severe cases, patients develop a pulmonary hemorrhage that is associated with high fatality rates. Several animal models were established for leptospirosis studies, such as rodents, dogs, and monkeys. Although useful to study the relationship among Leptospira and its hosts, the animal models still exhibit economic and ethical limitation reasons and do not fully represent the human infection. As an attempt to bridge the gap between animal studies and clinical information from patients, we established a three-dimensional (3-D) human lung cell culture for Leptospira infection. We show that Leptospira is able to efficiently infect the cell lung spheroids and also to infiltrate in deeper areas of the cell aggregates. The ability to infect the 3-D lung cell aggregates was time-dependent. The 3-D spheroids infection occurred up to 120 h in studies with two serovars, Canicola and Copenhageni. We standardized the number of bacteria in the initial inoculum for infection of the spheroids and we also propose two alternative culture media conditions. This new approach was validated by assessing the expression of three genes of Leptospira related to virulence and motility. The transcripts of these genes increased in both culture conditions, however, in higher rates and earlier times in the 3-D culture. We also assessed the production of chemokines by the 3-D spheroids before and after Leptospira infection, confirming induction of two of them, mainly in the 3-D spheroids. Chemokine CCL2 was expressed only in the 3-D cell culture. Increasing of this chemokine was observed previously in infected animal models. This new approach provides an opportunity to study the interaction of Leptospira with the human lung epithelium in vitro.


Assuntos
Leptospira , Leptospirose , Animais , Humanos , Leptospirose/veterinária , Pulmão , Virulência
3.
PLoS One ; 17(1): e0261344, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34982782

RESUMO

With more than 1400 chiropteran species identified to date, bats comprise one-fifth of all mammalian species worldwide. Many studies have associated viral zoonoses with 45 different species of bats in the EU, which cluster within 5 families of bats. For example, the Serotine bats are infected by European Bat 1 Lyssavirus throughout Europe while Myotis bats are shown infected by coronavirus, herpesvirus and paramyxovirus. Correct host species identification is important to increase our knowledge of the ecology and evolutionary pattern of bat viruses in the EU. Bat species identification is commonly determined using morphological keys. Morphological determination of bat species from bat carcasses can be limited in some cases, due to the state of decomposition or nearly indistinguishable morphological features in juvenile bats and can lead to misidentifications. The overall objective of our study was to identify insectivorous bat species using molecular biology tools with the amplification of the partial cytochrome b gene of mitochondrial DNA. Two types of samples were tested in this study, bat wing punches and bat faeces. A total of 163 bat wing punches representing 22 species, and 31 faecal pellets representing 7 species were included in the study. From the 163 bat wing punches tested, a total of 159 were genetically identified from amplification of the partial cyt b gene. All 31 faecal pellets were genetically identified based on the cyt b gene. A comparison between morphological and genetic determination showed 21 misidentifications from the 163 wing punches, representing ~12.5% of misidentifications of morphological determination compared with the genetic method, across 11 species. In addition, genetic determination allowed the identification of 24 out of 25 morphologically non-determined bat samples. Our findings demonstrate the importance of a genetic approach as an efficient and reliable method to identify bat species precisely.


Assuntos
Quirópteros/classificação , Quirópteros/genética , DNA Mitocondrial/análise , Animais , Monitoramento Epidemiológico , Fezes/química , França , Raiva/veterinária , Asas de Animais/química , Zoonoses
4.
Trop Anim Health Prod ; 54(1): 35, 2022 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-34988685

RESUMO

The objective of this study was to evaluate the effects of replacing different levels of spineless-cactus meal instead of ground corn on supplements for crossbred steers grazing in Urochloa brizantha cv. Marandú pastures. Forty crossbred steers with an average body weight (BW) of 261 ± 7.46 kg were distributed in a completely randomized design. In supplements, the ground corn grain was substituted with 0%, 30%, 60%, and 90% spineless-cactus meal. The substitution of spineless-cactus meal instead ground corn promoted a linear decrease in the ether extract (EE; P = 0.03) and non-fibrous carbohydrates (NFC; P < 0.01) intakes. The apparent digestibility of EE was influenced (P < 0.05) showing a linear decrease. The apparent digestibility of NFC had a quadratic effect (P = 0.03). For the neutral detergent fiber corrected for ash and protein, the apparent digestibility increased linearly (P = 0.01). The average daily gain showed a quadratic effect (P < 0.01), with a maximum response estimated at 44.94% (1055.52 g/day) substitution with spineless-cactus meal for ground corn. The cost per animal per period and the cost per hectare decreased linearly (P < 0.01). The revenue, net revenue, exchange rate, and monthly revenue of the activity showed quadratic responses to the spineless-cactus meal supplements (P < 0.01), with maximum effects at 44.99%, 47.46%, 61.25%, and 57.35%, respectively. The substitution with up to 44.94% of spineless-cactus meal for ground corn provided daily gains, increased the feed conversion, and was favorable as a cost to the production system. Moreover, the profitability increased with maximum animal performance and improved use of fiber from pastures.


Assuntos
Cactaceae , Zea mays , Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal , Animais , Dieta/veterinária , Digestão
5.
Trop Anim Health Prod ; 54(1): 36, 2022 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-34988774

RESUMO

This study aimed to examine the effects of selenium (Se) and vitamin E (vitE) supplementation on blood cell counts and blood metabolite concentrations in goats and their kids. Fifteen Saanen goats (average age 6 years of age; average initial body weight of 70 ± 10 kg) and 21 ½ Saanen × ½ Pardo Alpine crossbred goat kids (average body weight of 3.70 ± 0.64 kg) were used. Animals were distributed in a completely randomized design with five replicates per diet for mother goats and seven for goat kids and randomly assigned into three groups in the following diets: CON, control basal diet; Se, inclusion of 3.2 mg of Se/kg DM; SevitE, inclusion of 3.2 mg Se/kg DM and 1145 IU/day vitE/kg DM. Effects of time were observed on red blood cells, hemoglobin, hematocrit, mean corpuscular volume, and mean corpuscular hemoglobin in goats and goat kids. Effects of time were observed on differential counts of leucocytes, lymphocytes, and monocytes in goat kids. Interaction was observed for high-density lipoprotein and total protein in goats and for triglycerides, beta-hydroxybutyrate (BHBA), and gamma-glutamyltransferase (GGT) in goat kids. Effects of time were observed on low-density lipoprotein, triglycerides, glucose, lactate, BHBA, non-esterified fatty acids (NEFA), creatinine, aspartate-aminotransferase, and GGT in goats and all blood metabolites in goat kids. Selenium, vitE, or association in the evaluated levels are not sufficient to change blood cell counts when supplied in diets for goats or goat kids. However, the effect of time or interaction between time and diets change the blood metabolite concentrations in the animals.


Assuntos
Cabras , Selênio , Animais , Dieta/veterinária , Suplementos Nutricionais , Período Periparto , Selênio/farmacologia , Vitamina E
6.
Schweiz Arch Tierheilkd ; 164(1): 71-78, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34983741

RESUMO

INTRODUCTION: The golden jackal (Canis aureus) is a wild canid new to Switzerland. It is an officially monitored species and all deceased individuals are submitted for post-mortem examination to collect baseline health data. This includes parasitological examinations, with an emphasis on zoonotic, reportable infections, such as those caused by Trichinella spp. or Echinococcus spp. From 2016 to 2021, five golden jackals originating from four Swiss cantons were submitted for full post-mortem examination. In one case only organ samples were available, and therefore parasitological examination was not possible. Parasite stages recovered during necropsy, as well as by routine coproscopical techniques, were morphologically identified. Taeniid eggs and adult tapeworms were processed for molecular species identification. Additionally, tongue and diaphragm were analysed for Trichinella spp. by the artificial digestion technique followed by multiplex-PCR in positive cases. Of the four jackals investigated for parasites, hookworm eggs were detected in one animal, both adult worms and eggs of Echinococcus multilocularis were present in another case, and one animal was free of parasites. Eggs of E. multilocularis as well as eggs of Toxocara canis and sporocysts of Sarcocystis sp. were detected in the intestinal content, and Trichinella britovi larvae were found in the muscle samples of the last case. The health monitoring programme in place for protected carnivores in Switzerland allowed us to add the golden jackal to the list of hosts for the endemic zoonotic parasites E. multilocularis and T. britovi in this country. Hunters, farmers, and other persons who could come in contact with golden jackals should be aware of the associated health risk and handle faeces and carcasses with caution.


Assuntos
Echinococcus multilocularis , Trichinella , Triquinelose , Animais , Chacais , Suíça/epidemiologia , Triquinelose/epidemiologia , Triquinelose/veterinária
7.
Schweiz Arch Tierheilkd ; 164(1): 89-104, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34983743

RESUMO

INTRODUCTION: Strongyloides stercoralis is a worldwide occurring nematode infecting canids and primates (including humans), responsible for a largely underestimated zoonotic disease. We here present 18 cases including overall 20 dogs affected by S. stercoralis, diagnosed in Switzerland between 2010 and 2020. The Baermann examination was positive for S. stercoralis larvae in 10, suspicious in 4, negative in one and not performed in 2 dogs. In 3 dogs the infection was identified only at necropsy by histology or by direct faecal or mucosal smears from intestinal tissue. Confirmation of suspected, necropsied and Baermann-negative dogs relied on genetic analyses. Twelve dogs had a history of import from Eastern Europe (n=4), the Mediterranean basin (n=5) or Germany (n=3). They were 7 weeks to 9,5 months old, and also the dogs supposedly born in Switzerland were younger than one year (except two, aged 15 months and 14 years). Thirteen dogs were males and 6 females (1 unknown). The most represented breeds were Chihuahuas (n=5), French Bulldogs (n=4) and Pomeranians (n=3). The most frequent clinical sign and reason for presentation was diarrhoea, occurring in 11/20 animals. Further gastrointestinal symptoms were vomiting, anorexia/hyporexia, adipsia, dehydration, tense abdomen and tenesmus. Respiratory symptoms were the second most frequent, with coughing in 7/20 animals, followed by tachypnoea/dyspnoea in 5 and (reverse) sneezing in 3 dogs. Treatment with 50 mg/kg BW fenbendazole p.o. over 5 days was successful in 4 cases in which a follow-up examination was performed 3-6 weeks later; prolonged treatment over 21 days was also effective. Ivermectin off-label protocols described in the literature, e.g. 0,8 mg/kg BW s.c. or 0,5 mg/kg BW i.m. repeated after 2 weeks, were successful based on control examinations performed 3-10 weeks later. Strongyloides stercoralis infections are clinically relevant, potentially zoonotic and need to be included in differential diagnoses in case of canine gastrointestinal and respiratory disorders, especially in young and imported dogs.


Assuntos
Doenças do Cão , Parasitos , Strongyloides stercoralis , Estrongiloidíase , Animais , Doenças do Cão/diagnóstico , Doenças do Cão/tratamento farmacológico , Doenças do Cão/epidemiologia , Cães , Fezes , Feminino , Masculino , Estudos Retrospectivos , Estrongiloidíase/diagnóstico , Estrongiloidíase/tratamento farmacológico , Estrongiloidíase/epidemiologia , Estrongiloidíase/veterinária , Suíça/epidemiologia
8.
J Anim Sci ; 100(1)2022 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-34979552

RESUMO

Two experiments were carried out to determine a time-series effect of phytase on phosphorus (P) utilization in growing and finishing pigs using growth performance, apparent total tract digestibility (ATTD) of nutrients, P excretion, and plasma concentrations of minerals as the response criteria for evaluation. In both experiments, treatments were arranged as a 3 × 4 factorial in a randomized complete block design with 3 corn-soybean meal-based diets including a P-adequate positive control (PC), a low-P negative control (NC; no inorganic P), and NC supplemented with phytase at 1,000 FYT/kg (NC + 1,000); and 4 sampling time points at days 7, 14, 21, and 28 in experiment 1, and days 14, 26, 42, and 55 in experiment 2. In both trials, 96 growing pigs with average body weight (BW) of 19.8 ± 1.16 and 49.8 ± 3.21 kg, respectively, were allocated to the 3 diets with 8 replicates pens (4 barrows and 4 gilts) and 4 pigs per pen. In experiment 1, pigs fed the PC had higher (P < 0.01) BW, average daily gain (ADG), average daily feed intake (ADFI), and gain-to-feed ratio (G:F) when compared with pigs fed the NC. There was an interaction (P < 0.01) between time and diet on the BW and ADG of pigs while a linear and quadratic increase (P < 0.01) was observed with the ADFI and G:F, respectively, over time. Phytase supplementation improved (P < 0.01) all growth performance responses. Pigs fed the PC had greater (P < 0.01) ATTD of P and Ca than pigs fed the NC. There was no interaction effect on the ATTD of nutrients. Phytase addition improved the ATTD of P and Ca over pigs fed the NC. There was an interaction (P < 0.01) between diet and time on the total and water-soluble P (WSP) excreted. There was a quadratic decrease (P < 0.01) in plasma concentration of Ca in pigs over time. In experiment 2, there was a quadratic increase (P < 0.01) in BW, ADG, and G:F of pigs over time. Similarly, the inclusion of phytase improved (P < 0.05) all growth performance parameters except ADFI. A linear increase (P < 0.05) in the ATTD of DM, P, and Ca occurred over time. Phytase inclusion improved (P < 0.01) the ATTD of P and Ca. Plasma concentrations of P were improved by phytase addition. Phytase supplementation of the NC reduced WSP excretion by 45%, 32%, and 35% over the growing, finishing, and entire grow-finish period, respectively. In conclusion, phytase improves the utilization of P in growing and finishing pigs; however, the magnitude of effect on responses may vary over time.


Assuntos
6-Fitase , Fósforo na Dieta , Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal , Animais , Dieta/veterinária , Suplementos Nutricionais , Digestão , Feminino , Fósforo , Suínos , Zea mays
9.
Trop Anim Health Prod ; 54(1): 37, 2022 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-34997366

RESUMO

This study investigated the ameliorative effect of dietary tomato powder (TP) on performance and blood characteristics of broilers under heat stress condition. A total of 240 (21 days old), unsexed Marshall broiler chicks were allotted to four dietary treatments having 6 replicates of 10 birds each in a completely randomized design (CRD). The birds were exposed to ambient temperature of 33 °C between 8:00am and 5:00 pm and relative humidity of 81.5% for 2 h per day, throughout the 21-day feeding trial. Data was analyzed using one-way analysis of variance and polynomial contrast (linear (L) and quadratic (Q)) applied using IBM SPSS version 20. The experimental diets 1 (control), 2, 3, and 4 contained 0%, 2.5%, 5%, and 7.5% TP, respectively. Results showed that live weight, weight gain, feed intake, and feed conversion ratio increased (L.Q: P < 0.05) while mortality rate reduced (P < 0.05) following increasing dietary inclusion of TP. Birds fed diets containing 0, 2.5, and 5.0% TP had similar feed cost per weight gain which was lower (L: P < 0.001: Q: P < 0.05) than those of birds fed diet containing 7.5% TP. Most hematological parameters and serum enzymes measured were not affected (P > 0.05) by inclusion of TP. Birds fed diets containing 5.0 and 7.5% TP had similar serum cholesterol (L.Q: P < 0.05) and triglyceride (L:P < 0.001:.Q:P < 0.05) concentration which is lower than those of control. It was concluded that tomato powder (especially at 5% inclusion) in the diet of heat-stressed broiler chickens is beneficial for improved growth, health, and production cost with no adverse effect.


Assuntos
Galinhas , Lycopersicon esculentum , Ração Animal/análise , Animais , Dieta/veterinária , Suplementos Nutricionais , Resposta ao Choque Térmico , Pós
10.
J Helminthol ; 96: e1, 2022 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-34991739

RESUMO

Pseudosuccinea columella is considered invasive and has become an important intermediate host of both Fasciola species in many regions of the world. This systematic review assessed the geographical distribution of P. columella, and its implications in the transmission of Fasciola hepatica and Fasciola gigantica, globally. A literature search was conducted on Google Scholar, JSTOR and PubMed databases using Boolean operators in combination with predetermined search terms for thematic analysis. Results show that P. columella has been documented in 22 countries from Europe (3), Africa (8), Oceania (2), North America (3) and South America (6). Furthermore, this snail species has shown to adapt to and inhabit a vast array of freshwater bodies including thermal lakes and ditches with acidic soils. Studies showed that P. columella transmits F. hepatica, with natural and experimental infections documented in sub-Saharan Africa, Europe, South America and North America. Experimental infection studies in Cuba showed the presence of P. columella populations resistant to F. hepatica infection. Furthermore, some populations of this invasive snail collected from F. hepatica endemic locations in Brazil, Venezuela, Australia, South Africa, Colombia and Argentina were found without Fasciola infection. As a result, the role played by this snail in the transmission of Fasciola spp. in these endemic areas is still uncertain. Therefore, further studies to detect natural infections are needed in regions/countries where the snail is deemed invasive to better understand the veterinary and public health importance of this snail species in Fasciola-endemic areas and determine the global dispersion of resistant populations of P. columella.


Assuntos
Fasciola hepatica , Fasciola , Fasciolíase , Fasciolidae , Animais , Brasil , Fasciolíase/epidemiologia , Fasciolíase/veterinária , Geografia , Caramujos , África do Sul
11.
Vet Rec ; 190(1): 28-29, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34994428

RESUMO

This focus article has prepared by Rachael Collins and Amanda Carson of the APHA Small Ruminant Expert Group.


Assuntos
Doenças da Boca , Doenças dos Ovinos , Animais , Doenças da Boca/veterinária , Ruminantes , Ovinos , Doenças dos Ovinos/epidemiologia , Carneiro Doméstico
13.
Vet Rec ; 190(1): 8, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34994434
14.
Vet Rec ; 190(1): 18-22, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34994443

RESUMO

With Covid-19 and Brexit continuing to change the ways in which veterinary teams work, 2021 was another year of uncertainty. Here, Kathryn Clark sums up the year that was.


Assuntos
COVID-19 , Animais , COVID-19/veterinária , União Europeia , SARS-CoV-2 , Reino Unido
15.
Vet Rec ; 190(1): 5, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34994456
16.
Vet Rec ; 190(1): 6, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34994460
18.
Trop Anim Health Prod ; 54(1): 45, 2022 Jan 11.
Artigo em Inglês | MEDLINE | ID: mdl-35015154

RESUMO

To investigate the potential of Ampelopsis grossedentata extract used as a feed additive, laying performance, egg quality, yolk cholesterol, plasma biochemical parameters, intestinal histology, and gut microbiota of hens (n = 60) were determined between basal diet (CK) and dietary supplementation with A. grossedentata extract (RT) for 11 weeks. The laying rate in RT group was 6.3 percentage points higher than in CK group together with feed conversion rate decreasing. Significant upregulation of immunoglobulin indexes and downregulation of lipid-related indexes in RT group were also found in comparison with CK group, suggesting that dietary supplementation with A. grossedentata extract benefited in immunity enhancing and blood-fat depressing. Meanwhile, the villus height in duodenum and villus height to crypt depth ratio in duodenum and jejunum of RT group were significantly higher than that of CK group, indicating that dietary supplementation with A. grossedentata extract facilitated nutrient adsorption via intestinal histology changing. Moreover, the richness, diversity, and composition of gut microbiota in RT group significantly altered with a comparison of CK group, including beneficial bacterium and pathogenic bacterium, revealing that dietary supplementation with A. grossedentata extract could modify gut microbiota communities to affect intestinal adsorption and pathogen invasion. In addition, the lipid metabolism-related insulin signing pathway was significantly enriched by gut microbiota in RT group, which were conducive to egg production elevation via facilitating blood lipid amelioration and insulin resistance alleviation. These results provided a basis for A. grossedentata extract served as a feed additive in the hen industry.


Assuntos
Ampelopsis , Galinhas , Ração Animal/análise , Animais , Dieta/veterinária , Suplementos Nutricionais , Feminino , Extratos Vegetais/farmacologia
19.
Trop Anim Health Prod ; 54(1): 48, 2022 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-35018493

RESUMO

Sixteen Rahaji breed beef cattle (112.00 ± 0.15 kg body weight (BW)) were randomly assigned to one of four rations differing in the degree of substitution of sorghum straw with Cattail (Typha domingensis) silage. Growth performance, feed intake, blood profile, and economics of production were evaluated. Completely randomized design was used, and the feeding trial lasted for 42 days. Cattle were fed a total mixed ration of roughage:concentrate (400:600) g/kg dry matter and gamba hay free choice. The control diet (T0) contained 400 g/kg sorghum straw, expressed on a dry matter basis (DM). For additional treatments, Typha silage (TS) was included at 100 (T10), 200 (T20), and 300 (T30) g/kg of the mix replacing an equal DM weight of sorghum straw. Growth rate was similar (P > 0.05) regardless of the TS level. DM (5160.77-5524.96 g/d) and crude protein (846.36-955.82 g/d) intakes were higher (P < 0.05) in T20 and T30 diets, while the acid detergent fiber intake (471.27-512.46 g/d) reduced (P < 0.05) in TS-based diets. Red blood cell concentrations of cattle fed TS-based diets increased (P < 0.05). The mean corpuscular hemoglobin concentrations of cattle fed T20 diet decreased (P < 0.05) in comparison with the control. Sodium and albumin concentrations were higher (P < 0.05) in cattle fed TS-based diets. Total cost of feeding ($ 49.60-61.62) decreased (P < 0.05) in TS-based diets, while the gross benefit of cattle fed 300 g/kg TS diet ($ 74.98) was enhanced relative to cattle fed T0 and T10 diets. TS can be considered a new resource of feed for cattle.


Assuntos
Silagem , Typhaceae , Ração Animal/análise , Animais , Bovinos , Dieta/veterinária , Fibras na Dieta , Digestão , Ingestão de Alimentos , Melhoramento Vegetal , Rúmen , Silagem/análise , Zea mays
20.
Rev Bras Parasitol Vet ; 31(1): e017121, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35019026

RESUMO

In June 2012, a tick was found parasitizing a man in the city of São Paulo, who had recently returned from a visit to Pennsylvania, in the northeast of the United States. The tick was removed and sent to the São Paulo State Department of Health, where it was identified as a male of the species Dermacentor variabilis (Say, 1821), according to the literature and taxonomic keys. The tick was subjected to a PCR test to search for rickettsiae, but the result was negative. The fact that a human entered Brazilian territory unaware that he was parasitized by a hard tick not belonging to the national tick fauna is significant because of the possibility that an exotic species could be introduced and take hold in this country. Another major risk to public health is that this arthropod could be infected with the bacterium Rickettsia rickettsii, as this ectoparasite is the main vector of Spotted Fever on the East Coast of North America.


Assuntos
Dermacentor , Rickettsia , Rickettsiose do Grupo da Febre Maculosa , Animais , Brasil , Humanos , Masculino , Rickettsia/genética , Rickettsia rickettsii , Rickettsiose do Grupo da Febre Maculosa/veterinária
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