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PubMed2006

[Seroprevalence of Leptospira infection in habitants of peripheral neighborhoods in Cali, Colombia].

INTRODUCTION: Leptospirosis is a zoonotic disease with varying modes of transmission and clinical expression that affects humans inhabiting urban and rural areas worldwide. In Colombia, little is known regarding leptospirosis in urban settings. OBJECTIVES: To establish the seroprevalence of leptospiral infection in humans, to assess the serological reactivity and to identify factors associated with seropositivity. MATERIALS AND METHODS: We conducted an infection prevalence study in 259 inhabitants of peripheral neighborhoods in the city of Cali, Colombia, stratified by sex and age. Sociodemographic information, time residing in the same neighborhood, occupation, exposure to potentially infectious sources like water or animals, and serum used in a Microagglutination test against 19 Leptospira serovars were obtained. RESULTS: The population was composed mainly of students (37.1%), housewives (32%) and workers in non-formal activities (24.6%). The prevalence of anti-Leptospira antibodies was 23.3% (C195% 18.3-28.3), with high frequency in people older than 57 years of age and significantly higher in men than women (p=0.045). There was an association between the presence of antibodies and contact with animals (p=0.038). Reactivity was observed against 16 of the 19 serovars evaluated, but the antibody titers were low. CONCLUSIONS: The high infection seroprevalence found in this study suggests frequent contact with Leptospira in putatively high risk neighborhoods of Cali. Contact with animals was the most significant factor associated with the presence of anti-Leptospira antibodies.

Adolescent↗
PubMed1991

Diagnosis and prevalence of leptospira infection in aborted and stillborn horses.

A study was conducted to evaluate a recently available fluorescent antibody test (FAT) conjugate for the detection of leptospires in tissues of aborted and stillborn horses, to determine the leptospira antibody titers and compare serologic test results with FAT results, and to determine the prevalence of leptospira-induced abortions and stillbirths in the equine population of central Kentucky. From July 1, 1988 through June 30, 1989, 15 (2.5%) of 594 submissions (fetuses, stillborn foals, and/or placentas) were diagnosed as leptospirosis by the FAT (14 of 15 tested) and/or microscopic agglutination test (12 of 14 tested). Of the 12 serologically positive fetal fluids, 10 had high tigers against Leptospira interrogans serovar pomona and 2 against serovar grippotyphosa.

Abortion, Veterinary↗
PubMedDate not supplied

[Leptospira infection under the natural conditions of the environs of Saint Petersburg].

The existence of valent natural foci of leptospirosis, stable and polyhostal, under the conditions of urban agglomerations has been established. In an intensively urbanized landscape, the foci of mixed (natural and anthropic) type can be found. Depending on the character of microlandscape in a given zone, the main hosts of leptospires are different species of small mammals in whose populations, as a rule, the circulation of at least three Leptospira species is observed. Introduction of the 'carriership index' will help determine the role of different species of small mammals as the potential source of leptospires in the foci, as well as the proportion of different circulating Leptospira species and their zonal distribution.

Animals↗
PubMed2001

Leptospira infection in two black rhinoceroses (Diceros bicornis michaeli).

Two black rhinoceroses (Diceros bicornis michaeli) developed clinical leptospirosis without hemolytic crises. The first rhinoceros presented with peracute depression, anorexia, rear leg trembling, dysuria, glucosuria, gastrointestinal discomfort, and decreased fecal output and died within 12 hr. Necropsy and histopathology revealed lesions within multiple organs. Leptospirosis was diagnosed postmortem based on positive fluorescent antibody staining of liver. The second rhinoceros presented 2 mo later with similar signs. It survived with treatment and was diagnosed with leptospirosis based on serology using microscopic agglutination testing and detection of urinary antigen using a fluorescent antibody technique. Leptospira kirschneri serovar grippotyphosa was postulated as the etiologic agent, with transmission probably occurring through wallow contamination by wild raccoons (Procyon lotor).

Agglutination Tests↗