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R Loregnard

Publications and source records attributed to R Loregnard.

6 recordsLinked to original sources
PubMed1993

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 differences were not statistically significant.

Animals↗
PubMed1993

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 = 0.05; chi 2) between animal semi-intensively managed (4.4%) and those intensively kept (4.3%), between diarrhoeic (5.0%) and non-diarrhoeic (3.3%), between females (5.2%) and males (3.4%). Nine serotypes were isolated with a predominance of S. hadar, S. gaminara and S. typhimurium in calves, piglets and lambs, respectively. Two serotypes, S. kinshasa and S. virchow are reported for the first time in animals in the West Indies. All Salmonella strains were sensitive to ampicillin and gentamycin whereas resistance was high to tetracycline (40.0%), triple sulphur (30.0%) and streptomycin (26.7%).

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PubMedDate not supplied

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 prevalence of infection was not significantly (P > or = 0.05; chi 2) different between diarrhoeic (46.1%) and non-diarrhoeic (45.1%) animals nor between male (47.5%) and female (43.8%). The frequency of isolation of campylobacters harvested from semi-intensively managed animals (75.4%) was, however, significantly higher (P < or = 0.001; chi 2) than from intensively or extensively managed animals. Overall, C. coli strains (32.8%) were more frequently isolated than C. jejuni strains (12.9%) and the difference was significant (P < or = 0.001; chi 2). Biotype I accounted for 67.3% (152/226) of C. coli and 64.0% (57/89) of C. jejuni strains isolated. A total of 245 (77.8%) strains of Campylobacter exhibited resistance to one or more antibiotics and was highest to streptomycin (76.5%), kanamycin (28.6%) and neomycin (26.7%). It was concluded that Campylobacter infections were widespread in livestock in Trinidad, particularly C. coli in piglets.

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