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Prevalence of Antibodies to <i>Toxoplasma gondii</i>and <i>Neospora caninum</i>in Pigs in Grenada, West Indies

Open Journal of Veterinary Medicine 2015年第6期5卷 138-141页

作者： Ravindra Nath Sharma Keshaw Tiwari Alfred Chikweto claude deallie Muhammad Iqbal Bhaiyat Department of Pathobiology School of Veterinary Medicine St. George’s University St. George Grenada Veterinary and Livestock Division Ministry of Agriculture Land Fisheries and Environment Grenada

The aim of the study was to estimate the prevalence of antibodies to Toxoplasma gondii (T. gondii) and Neospora caninum (N. caninum) in pigs in Grenada, West Indies. T. gondii is a serious zoonosis affecting the unborn fetus and immunocompromized individuals. N. caninum is a similar coccidian parasite, which is not zoonotic, but is the cause of abortion and neonatal mortality in livestock similar to T. gondii. An earlier study conducted in Grenada and using a modified agglutination test (MAT) revealed seropositivity to T. gondii in pigs. No information is available on N. caninum infection of pigs in the Caribbean islands including Grenada. Serum samples from 185 pigs in Grenada, West Indies were tested for antibodies to T. gondii and N. caninum using an indirect enzyme linked immunosorbent assay (ELISA). Antibodies to T. gondii were found in 24.3% of pigs (95% confidence interval (CI): 18.12% to 30.48%) as all the tested pigs were negative for antibodies to N. caninum. Although, seroprevalence for T. gondii was higher in females (25.75%) than in males (20.70%), this result was statistically insignificant (p = 0.57). The results were similar to a previous study in Grenada confirming the continuity of infection in pigs. Human Toxoplasmosis is transmitted mainly through ingestion of tissue cysts in contaminated raw or undercooked meat or sporulated oocysts in soil, water or vegetables. Education of farmers and the Grenadian community on epidemiology of these parasites is warranted to prevent infection in pigs and in humans. This is the first report on the seroprevalence of N. caninum in pigs in the Caribbean region.

关键词： Toxoplasma gondii Neospora caninum Pigs MAT ELISA

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Prevalence of Canine Heartworm Disease in Stray Dogs of Grenada, West Indies

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Open Journal of Veterinary Medicine 2017年第11期7卷 168-174页

作者： Melissa C. Brown Alfred Chikweto Keshaw P. Tiwari claude deallie Muhammad Iqbal Bhaiyat Ravindra N. Sharma Department of Pathobiology School of Veterinary Medicine St. George’s University Grenada West Indies

Dirofilariasis (heartworm disease) has been reported in Grenadian dogs. The aim of this cross-sectional study was to determine the prevalence of Dirofilaria immitis in stray dogs (n = 523) from the six Parishes of Grenada. Necropsy records were reviewed;information on the distribution and lesions of Dirofilaria immitis was recorded. A total of 144 from 523 dogs (27.5%;95% CI: 23.9% to 31.5%) were positive for Dirofilaria immitis on necropsy. This study shows that heartworm disease is prevalent in stray dogs in all the Parishes of mainland Grenada. This is a progressive, life-threatening disease and thus, there is a need to screen and prevent it within the stray dog population of Grenada.

关键词： Dirofilaria immitis Prevalence Stray Dogs Necropsy Grenada

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Genital and Extragenital Canine Transmissible Venereal Tumor in Dogs in Grenada, West Indies

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Open Journal of Veterinary Medicine 2013年第2期3卷 111-114页

作者： Alfred Chikweto Sachin Kumthekar Hugh Larkin claude deallie Keshaw P. Tiwari Ravindra N. Sharma Muhammad I. Bhaiyat Pathobiology Academic Program School of Veterinary Medicine St. George’s University St. George Grenada

Transmissible venereal tumor (TVT) is a widely reported transplantable tumor in dogs, with no breed or sex predilection and with a low metastatic rate. This retrospective study conducted from 2005 and 2011 sought to evaluate the total number of TVT cases, and to report extragenital TVT lesions in dogs from the small tropical island of Grenada, West Indies. Evaluation of the biopsy and necropsy specimens from dogs with TVT was carried out by cytological and histopathological methods. In the present study, we observed a total of 78 dogs with TVT, comprising 40 male and 38 female dogs. Most cases were from dogs between 3 and 6 years;less frequently from older dogs (over 6 years) or younger dogs (1 - 2 years of age). In the present study, we report 15 cases (19.2%) of dogs with TVT in extragenital sites. Tumors were noted in the nasal cavity, eye orbit, spleen, liver, skin, ribs, subcutaneous, and submandibular, cervical and inguinal lymph nodes. There was also evidence of metastasis to the ovaries in 2 dogs. The most interesting finding was the presence of extragenital lesions without primary genital involvement in 4 cases (5.1%). Our findings emphasize the need to consider TVT on the list of differential diagnosis for masses in extragenital sites in dogs from geographic regions where TVT is prevalent.

关键词： Dog Extragenital Transmissible Venereal Tumor Grenada

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