Publications

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the relative importance of rotavirus and other pathogens in the etiology of gastroenteritis in trinidadian children.over a 2-year period, 300 infants less than 3 years old with gastroenteritis admitted to hospitals in trinidad were investigated for the presence of certain microorganisms in the feces, along with an equal number of age- and sex-matched controls. rotavirus was detected in 23% of cases and 1% of controls; salmonella in 7% of cases and in 1% of controls; shigella in 4% of cases and in no controls and two serotypes of enteropathogenic e. coli in 7% of cases and in 2% of controls. campylobacter fetu ...19826277207
prevalence of bacterial enteropathogens in pet dogs in trinidad.the rectal swabs of diarrhoeic and apparently healthy non-diarrhoeic dogs presented to a small animal clinic were cultured for escherichia coli, salmonella and campylobacter and the enteropathogens were characterized. overall, of 130 dogs divided equally into two groups consisting of 65 diarrhoeic and 65 non-diarrhoeic dogs, 99 (76.2%), 6 (4.6%) and 18 (13.8%) were positive for e. coli, salmonella and campylobacter, respectively. the differences were statistically significant (p < or = 0.05; chi ...19979084230
prevalence of salmonella, listeria monocytogenes, campylobacter spp., yersinia enterocolitica and cryptosporidium spp. in bulk milk, cows' faeces and effluents of dairy farms in trinidad.the prevalence of listeria, salmonella, campylobacter, yersinia and cryptosporidium species in bulk milk, faeces of dairy cows and effluents of milking parlours from dairy farms in trinidad was investigated. of the 177 bulk milk samples studied, 3 (1.7%), 3 (1.7%) and 2 (1.1%) were positive for l. monocytogenes, salmonella spp. and y. enterocolitica, respectively, but were all negative for campylobacter and cryptosporidium species. from 333 faecal samples tested, l. monocytogenes, campylobacter ...19969239938
some bacterial enteropathogens in wildlife and racing pigeons from trinidad.fecal and cloacal swabs or feces of wild mammalian, avian and reptilian species, either farmed or free-ranging, and of racing pigeons (columba livia) kept in lofts were cultured for salmonella spp., campylobacter spp., and yersinia spp. of 291 free-ranging mammals tested, 6 (2%) and 1 (< 1%) yielded positive cultures of salmonella spp. and campylobacter spp., respectively. salmonella newport was the predominant serotype isolated and the opossum (didelphis marsupialis insularis) had the significa ...19989476228
prevalence of salmonella and campylobacter species in animals at emperor valley zoo, trinidad.the prevalence of salmonella and thermophilic campylobacter species in animals kept at the emperor valley zoo, trinidad, was determined. of the 433 animals from a total of 30 species sampled, 28 (6.5%) and 11 (2.5%) were positive for salmonella and campylobacter, respectively. the difference was statistically significant (p < or = 0.001: chi2). overall, 12 stereotypes of salmonella were isolated, with s. miami accounting for eight (25.8%) of 31 isolates. all campylobacter isolates were c. jejuni ...19989732046
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
frequency and characteristics of selected enteropathogens in fecal and rectal specimens from childhood diarrhea in trinidad, 1998-2000.to determine the prevalence and characteristics of selected enteric pathogens in diarrheic children in six counties of the island of trinidad.200515826396
microbial health risk posed by table eggs in trinidad.a survey of the microbial quality of table eggs sold in trinidad was conducted. for 23 poultry layer farms each visited twice approximately 1 month apart, 25 pooled eggs constituted a composite sample, for 14 shopping malls each visited twice approximately 1 month apart, six pooled eggs made a composite sample and for a total of 102 other retailers across the country each visited once over a 4-month period, six pooled eggs constituted a composite sample. swabs of egg shells and egg content were ...200516274501
occurrence of selected foodborne pathogens on poultry and poultry giblets from small retail processing operations in trinidad.we conducted a study to determine quantitatively and qualitatively the presence of campylobacter spp., escherichia coli, staphylococci, total coliforms, total aerobic bacteria, and salmonella on broiler carcasses from selected small retail processors in trinidad. we used standard media and procedures for detection and quantification. all carcass and weep samples were positive for aerobic bacteria, e. coli, total coliforms, and staphylococci. significant differences in the mean counts of aerobic ...200616715810
investigation for possible source(s) of contamination of ready-to-eat meat products with listeria spp. and other pathogens in a meat processing plant in trinidad.in 2003, there was a recall of three processed (chicken franks, spice ham and turkey ham ready-to-eat (rte) meat products by a large processing plant in trinidad as a result of contamination by listeria monocytogenes. the study was conducted to investigate the possible source(s) of listeria contamination of recalled rte meat products and to determine the prevalence of listeria spp., salmonella spp., escherichia coli and campylobacter spp. in the products and air within the plant. raw and process ...200616943025
isolation of enteric pathogens from bats in trinidad.bats are one of the most widely distributed mammals in the world, and they are reservoirs or carriers of several zoonoses. bats were trapped in 27 geographic locations across trinidad and tobago, and following euthanasia, gastrointestinal tracts were aseptically removed. contents were subjected to bacteriologic analysis to detect salmonella spp., escherichia coli, and campylobacter spp. isolates of salmonella were serotyped, and e. coli isolates were screened for o157 strains and antimicrobial s ...200919901371
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
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