Publications

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serological studies on leptospirosis in livestock and chickens from grenada and trinidad.sera from 1,206 livestock animals and chickens on grenada and trinidad were tested for leptospiral antibodies by the microscopic agglutination test. 376 of the sera were positive (25% of those tested on grenada and 44% on trinidad). the positive sera were obtained from 25% of 324 cattle, 35% of 130 pigs, 35% of 146 sheep, 25% of 44 goats and 11% of 175 chickens on grenada; and 92% of 26 cattle, 53% of 122 pigs, 76% of 87 horses and donkeys and 11% of 144 chickens on trinidad. eight sera from duc ...19853832496
bluetongue epidemiology in the caribbean region: serological and entomological findings from a pilot sentinel system in trinidad and tobago.when monitored by the agar gel immunodiffusion test for antibody to bluetongue viruses, a sentinel flock of twenty-five lambs remained seropositive through the year, whereas in a sentinel herd of twenty calves only two individuals seroconverted and these became negative again within 2 months. a light trap operated with the calf herd yielded high numbers of culicoides insignis lutz (over 18,000 per trap night) along with c. filariferus hoffman, c. pusillus lutz, c. leopoldi ortiz, c. foxi ortiz, ...19892562417
frequency of isolation of yersinia enterocolitica from livestock in trinidad. 19921300681
campylobacter infections in calves, piglets, lambs and kids in trinidad.faeces or rectal swabs from 689 diarrhoeic and non-diarrhoeic animals were cultured for thermophilic campylobacters and their antibiograms were determined. three hundred and fifteen (45.7%) samples were positive for campylobacter. piglets had the highest prevalence, 79.3% (233/294) and lambs, the lowest with 17.9% (15/84) being positive. the difference was statistically significant (p < or = 0.01; chi 2). in calves, 20.5% (60/293) and in kids 38.9% (7/18) were positive for campylobacters. the pr ...19921467924
epidemiology of salmonella infections in trinidadian livestock farms.faeces of 689 diarrhoeic and non-diarrhoeic livestock were examined for salmonellae and the antibiograms of isolates were determined. twenty-nine (4.2%) animals were positive for salmonella. the highest prevalence was detected amongst calves with 14 (4.8%) of 293 found positive and the lowest prevalence in kids with none of 18 sampled shedding salmonellae. twelve (4.1%) of 294 piglets and 3 (3.6%) of 84 lambs tested were positive for salmonella. there were no statistical differences (p > or = 0. ...19938190978
prevalence of cryptosporidium oocysts in livestock in trinidad and tobago.faecal samples from 683 diarrhoeic and non-diarrhoeic piglets, calves, lambs and goat kids were examined for cryptosporidium oocysts. the prevalence of infection in piglets and lambs was 19.6% and 20%, respectively, and these rates were significantly higher than those detected in calves (8.7%). amongst the four animal species studied, the detection rates were higher in diarrhoeic than in non-diarrhoeic animals and in animals under extensive and semi-intensive husbandry systems. however, these di ...19938447064
rotavirus infection in calves, piglets, lambs and goat kids in trinidad.faecal samples from diarrhoeic and non-diarrhoeic calves, piglets, lambs and goat kids were collected and screened by a latex agglutination test to detect the presence of group a rotavirus antigen. of a total of 470 animals screened, 138 (29.4%) had faecal samples positive for rotavirus antigen. the prevalences of infection were 27.7% (73/264) in calves, 27.8% (45/162) in piglets, 48.6% (18/37) in lambs and 28.6% (2/7) in goat kids. rotavirus antigen was not detected in calves and lambs < 1 week ...19948044669
seroprevalences of brucellosis, q-fever and toxoplasmosis in slaughter livestock in trinidad.serum samples obtained from livestock (cattle, chickens, pigs, sheep, goats and water buffaloes) slaughtered at various slaughter houses in trinidad were screened for agglutinins to three zoonosis causing pathogens. of a total of 751 sera tested, 2 (0.3%) originating from chickens were positive for brucella abortus agglutinins using the rose bengal test (rbt), but both were negative by the tube serum agglutination test (sat). thirty-six (4.8%) of 749 sera were positive for coxiella burnetii aggl ...19968881416
ethnoveterinary medicines used for ruminants in trinidad and tobago.ethnoveterinary research was conducted in trinidad and tobago in 1995, in order to document existing ethnoveterinary practices. this paper describes 20 medicinal plants used to treat ruminants. the main plants used were azadirachta indica and curcuma longa. medicinal plants were used predominantly for endoparasites, internal and external injuries and pregnancy-related conditions. a 4-stage process was used to conduct the research and document the ethnoveterinary practices. this documentation cou ...19989658442
a longitudinal study on enteropathogenic infections of livestock in trinidad.a longitudinal study was conducted on selected livestock farms to determine the prevalence of enteropathogens in diarrhoeic and non-diarrhoeic animals. the enteropathogens assayed from faecal samples and rectal swabs were bacteria (escherichia coli, campylobacter spp. salmonella spp. and yersinia enterocolitica), parasites (coccidia, gastrointestinal nematodes and cryptosporidium spp.) and viruses (group a rotavirus and parvovirus). the prevalence of the enteropathogens in various animal species ...200111340494
a case of cephalothoracopagus in sheep in trinidad and tobago.a case of cephalothoracopagus in sheep complicated with several defects of skeletal, cardiovascular, respiratory, gastrointestinal, and urogenital systems is reported.200312619557
the effect of gastrointestinal parasitism on blood copper and hemoglobin levels in sheep.endoparasitism is a problem in trinidad, as it is in most tropical countries. parasite infection has been suspected to contribute to the pathogenesis of swayback disease (which is also prevalent in trinidad), but the mode of action has not been clearly defined, although it has been suggested that parasites interfere with the absorption of copper from the gastrointestinal tract. the objectives of the study were to assess the effect of endoparasitism on blood copper levels and hemoglobin (hb) conc ...200516363328
seroepidemiology of leptospirosis in livestock in trinidad.a study was conducted to determine the seroprevalence of leptospirosis and infecting serovars across livestock (cattle, sheep, goats, and pigs) in trinidad using the microscopic agglutination test with an international panel of 23 serovars. of a total of 590 cattle tested, 21.5% were seropositive with agglutinations to 13 of the 23 antigens used in the panel. icterohaemorrhagiae (9.3%), sejroe (4.1%), ballum (4.1%), and autumnalis (1.9%) were the predominant serogroups detected in the cattle sam ...201020953838
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