RESUMO

Of 133 cases of human leptospirosis recorded in Trinidad between 1977 and the end of February 1982, at least eight (6%) were in people who worked on pig farms. Three of the eight died, and their presumptive infecting serogroups were Icterohaemorrhagiae (3), Canicola (2), Pyrogenes (2) and Grippotyphosa (1). Six of the eight cases were followed up. Altogether, sera from 201 pigs, 78 other livestock animals, 38 workers and 34 dogs were tested for leptospiral agglutinins. The seropositivity prevalence among pigs on farms with human illness (43% greater than or equal to 1:100) was similar to that in pigs from farms not associated with illness (46%), but the titres among the former group (geometric mean 209.5) were higher than among the latter (91.5), where only titres less than or equal to 1:400 were recorded. Similar infecting serogroups were recorded among pigs on the two groups of farms, with Icterohaemorrhagiae, Autumnalis, Canicola and Pyrogenes most frequently recorded overall. There was little evidence of the pig-adapted serogroups Pomona and Tarassovi. Twelve of 13 workers (93%) from a farm on which at least two other people had contracted leptospirosis had serological evidence of exposure, compared with seven of 24 (29%) on a neighbouring farm not associated with human illness. Dogs and rodents are thought to be the major sources of leptospirosis in pigs and piggery workers in Trinidad.

Assuntos

Leptospirose/transmissão , Adolescente , Adulto , Animais , Cães , Feminino , Humanos , Leptospira/isolamento & purificação , Leptospirose/epidemiologia , Leptospirose/parasitologia , Masculino , Pessoa de Meia-Idade , Doenças Profissionais/parasitologia , Suínos , Fatores de Tempo , Trinidad e Tobago

RESUMO

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 ducks and geese on Trinidad were tested and found to be negative. The serogroups most commonly found to react with the sera of the Grenadian animals were Autumnalis, Icterohaemorrhagiae, Hebdomadis and the related serogroups Sejroe and Mini, and Pyrogenes; in the Trinidadian animals they were Icterohaemorrhagiae, Autumnalis, Hebdomadis and its related serogroups, and Panama. Strains of serogroup Pomona do not appear to have become established as livestock pathogens on the islands.

Assuntos

Anticorpos Antibacterianos/análise , Leptospirose/veterinária , Testes de Aglutinação , Animais , Bovinos , Doenças dos Bovinos/imunologia , Galinhas , Cabras , Doenças dos Cavalos/imunologia , Cavalos , Leptospirose/imunologia , Doenças das Aves Domésticas/imunologia , Ovinos , Doenças dos Ovinos/imunologia , Suínos , Doenças dos Suínos/imunologia , Trinidad e Tobago , Índias Ocidentais

RESUMO

An epizootic of yellow fever occurred in Alouatta monkeys in November 1978. An intensive surveillance programme was initiated to locate sick and dying monkeys in the forests of Trinidad. Thirty Alouatta (red howler) monkeys were collected and examined for yellow fever virus (AU)