RESUMO
The susceptibility of adult male goats to Brucella ovis infection was studied. Fifteen goats and fifteen rams both of ages ranging from 22 to 34 months were inoculated conjunctivally with 10(9) cells of B. ovis strain recently isolated from a case of ram epididymitis. Five goats and five rams were killed 78 days after inoculation and similar groups were killed at two month intervals thereafter. B. ovis was recovered from semen of a male goat, 33 and 61 days after inoculation. The five goats sacrificed 78 days after inoculation contained Brucella in their organs. The semen and the tissues of the two other groups remained culturally negative throughout the observation period. Seven cultures were obtained from the semen of 14 rams used comparatively as inoculated controls. Epididymitis was clinically observed only in one male goat although under six presented macroscopic lesions. Seven rams out of the 15 inoculated showed clinical symptoms of epididymitis. Antibodies detectable by complement fixation and immunodiffusion disappeared 80 days after inoculation in goats, while rams reacted during the 189 days period of observation. It is concluded that the B. ovis infection in male goats is transient and the role that they may play in the epizootiology of the disease is negligible.
Assuntos
Brucelose/imunologia , Cabras , Animais , Brucella/isolamento & purificação , Brucelose/microbiologia , MasculinoRESUMO
The susceptibility of adult male goats to Brucella ovis infection was studied. Fifteen goats and fifteen rams both of ages ranging from 22 to 34 months were inoculated conjunctivally with 10(9) cells of B. ovis strain recently isolated from a case of ram epididymitis. Five goats and five rams were killed 78 days after inoculation and similar groups were killed at two month intervals thereafter. B. ovis was recovered from semen of a male goat, 33 and 61 days after inoculation. The five goats sacrificed 78 days after inoculation contained Brucella in their organs. The semen and the tissues of the two other groups remained culturally negative throughout the observation period. Seven cultures were obtained from the semen of 14 rams used comparatively as inoculated controls. Epididymitis was clinically observed only in one male goat although under six presented macroscopic lesions. Seven rams out of the 15 inoculated showed clinical symptoms of epididymitis. Antibodies detectable by complement fixation and immunodiffusion disappeared 80 days after inoculation in goats, while rams reacted during the 189 days period of observation. It is concluded that the B. ovis infection in male goats is transient and the role that they may play in the epizootiology of the disease is negligible.
RESUMO
The susceptibility of adult male goats to Brucella ovis infection was studied. Fifteen goats and fifteen rams both of ages ranging from 22 to 34 months were inoculated conjunctivally with 10(9) cells of B. ovis strain recently isolated from a case of ram epididymitis. Five goats and five rams were killed 78 days after inoculation and similar groups were killed at two month intervals thereafter. B. ovis was recovered from semen of a male goat, 33 and 61 days after inoculation. The five goats sacrificed 78 days after inoculation contained Brucella in their organs. The semen and the tissues of the two other groups remained culturally negative throughout the observation period. Seven cultures were obtained from the semen of 14 rams used comparatively as inoculated controls. Epididymitis was clinically observed only in one male goat although under six presented macroscopic lesions. Seven rams out of the 15 inoculated showed clinical symptoms of epididymitis. Antibodies detectable by complement fixation and immunodiffusion disappeared 80 days after inoculation in goats, while rams reacted during the 189 days period of observation. It is concluded that the B. ovis infection in male goats is transient and the role that they may play in the epizootiology of the disease is negligible.
RESUMO
As a major livestock disease, leptospirosis cuts significantly into the world's supply of animal protein through its consequences of abortion and calf mortality, retarded growth, and reduced milk production. Evidently, such losses have severe economic implications as well. The disease's impact has been somewhat diminished in the developed countries thanks to mechanization of rural activities, improved personal and environmental hygiene, and broad application of preventive measures, including the administration of bacterins, in domestic animals. Still, even in these circumstances it remains a serious problem. In the developing countries, in which large percentages of the population live in close contact with animals, the spread of infection is much greater. Moreover, the ecology of tropical and subtropical America--with its abundant rainfall, natural water courses, and high temperatures--is particularly favorable for the transmission of leptospires. In such conditions the human disease is a growing threat as well. The spread of leptospirosis, both in animals and man, is facilitated by the fact that inefection from many of the serotypes can exist without presenting serious clinical manifestations. Hence the importance of laboratory diagnosis. Systematic studies over time of serotype distribution, coupled with wide and improved surveillance, will be a key factor in bringing the disease under control. According to the limited seroepidemiologic data available, 3 to 18 per cent of the general human population, 2 to 32 per cent of those belonging to exposed occupational groups, and 10 to 50 per cent of patients with fever of unknown origin have leptospiral antibody. The most predominant serogroups are Icterohaemorrhagiae, Canicola, Pomona, Hebdomadis, and Bataviae. So far more than 50 serotypes, from 15 serogroups, have been isolated from man and animals in Latin America and the Caribbean area.
Assuntos
Países em Desenvolvimento , Leptospirose , Saúde Pública , Animais , Animais Domésticos , Bovinos , Doenças dos Bovinos/microbiologia , Surtos de Doenças , Reservatórios de Doenças , Cães , Inquéritos Epidemiológicos , Humanos , América Latina , Leptospira/isolamento & purificação , Leptospirose/microbiologia , Leptospirose/veterinária , Ratos , Ovinos , Doenças dos Ovinos/microbiologia , Suínos , Doenças dos Suínos/microbiologia , Doença de Weil , Índias OcidentaisRESUMO
As a major livestock disease, leptospirosis cuts significantly into the world's supply of animal protein through its consequences of abortion and calf mortality, retarded growth, and reduced milk production. Evidently, such losses have severe economic implications as well. The disease's impact has been somewhat diminished in the developed countries thanks to mechanization of rural activities, improved personal and environmental hygiene, and broad application of preventive measures, including the administration of bacterins, in domestic animals. Still, even in these circumstances it remains a serious problem. In the developing countries, in which large percentages of the population live in close contact with animals, the spread of infection is much greater. Moreover, the ecology of tropical and subtropical America--with its abundant rainfall, natural water courses, and high temperatures--is particularly favorable for the transmission of leptospires. In such conditions the human disease is a growing threat as well. The spread of leptospirosis, both in animals and man, is facilitated by the fact that inefection from many of the serotypes can exist without presenting serious clinical manifestations. Hence the importance of laboratory diagnosis. Systematic studies over time of serotype distribution, coupled with wide and improved surveillance, will be a key factor in bringing the disease under control. According to the limited seroepidemiologic data available, 3 to 18 per cent of the general human population, 2 to 32 per cent of those belonging to exposed occupational groups, and 10 to 50 per cent of patients with fever of unknown origin have leptospiral antibody. The most predominant serogroups are Icterohaemorrhagiae, Canicola, Pomona, Hebdomadis, and Bataviae. So far more than 50 serotypes, from 15 serogroups, have been isolated from man and animals in Latin America and the Caribbean area (Au)
Assuntos
Países em Desenvolvimento , Leptospirose , Saúde Pública , América Latina , Índias OcidentaisAssuntos
Leptospira/isolamento & purificação , Leptospirose/veterinária , Xenarthra , Testes de Aglutinação , Animais , Anticorpos/análise , Argentina , Técnicas Bacteriológicas , Bovinos , Doenças dos Bovinos/epidemiologia , Rim/microbiologia , Leptospira/classificação , Leptospira/imunologia , Leptospirose/diagnóstico , Leptospirose/microbiologia , SorotipagemAssuntos
Brucella/classificação , Brucelose/epidemiologia , Animais , Brucelose/veterinária , América Central , Humanos , México , América do SulAssuntos
Brucella/isolamento & purificação , Animais , Argentina , Europa (Continente) , Cobaias , CoelhosAssuntos
Brucella/patogenicidade , Brucelose/epidemiologia , Raposas , Animais , Argentina , Portador SadioAssuntos
Brucelose Bovina/epidemiologia , Leite , Animais , Argentina , Técnicas Bacteriológicas , Bovinos , Cobaias , Técnicas In VitroRESUMO
In the course of an investigation in 1962-64 into the natural occurrence of brucellosis among grey foxes in Argentina, agglutination tests were performed on 728 sera of the foxes Dusicyon gymnocercus antiquus and D. griseus griseus, captured in the provinces of Buenos Aires and Rio Negro. Agglutination titres of from 1:25 to 1:800 were found in 173 (23.8%) of the foxes tested, 11.3% having titres of 1:100 or more. In bacteriological testing, eight cultures of Brucella abortus, biotype 1, were obtained.Discussing their findings, the authors point out that it cannot be stated definitely whether Brucella is naturally shed by foxes or to what extent infected foxes contribute to the dissemination of brucellosis.