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Home » Archive » 2010

TDK conference 2010

Examination of the occurrence of Histophilus somni in goat flocks of Hungary
Gyöngyösi Bianka - year 5
SzIU, Faculty of Veterinary Science, Department of Microbiology and Infectious Diseases
Supervisor: Katalin Jánosi DVM

Abstract:

Histophilus somni (former name: Haemophilus somnus) is a Gram-negative fastidious, facultative pathogenic bacterium, that colonises the mucous membranes of respiratory and genital tract of cattle and sheep. It can cause local or generalised diseases, but asymptomatic carriers can also occur in both animal species. In cattle it can cause thromboembolic meningoencephalitis, pneumonia and reproductive problems as well as septicaemia, orchitis and epididymitis in sheep.

H. somni was also reported in American bison (Bison bison) and in bighorn sheep (Ovis canadensis nelsoni). The first isolation of H. somni from goats was reported by Jánosi et al. in 2008.

We wanted to examine the occurrence of H. somni in goat flocks kept with sheep, and also to evaluate the carriage of H. somni on the mucous membranes of goats and the alterations of it in a chosen goat flock.

Four goat flocks were sampled in Borsod-Abaúj-Zemplén county of Hungary between February and November of 2009. Vaginal (347) and praeputial (30) swab samples were collected from 337 goats and 40 sheep. In the goat flock of Erdőbénye samples were collected in a 10 months period.

Twenty seven and two bacterial strains were isolated from goats and sheep respectively, identified as H. somni on the basis of cultural, morphological and biochemical characteristics. Using the BIOLOG MICROSTATION™ ID SYSTEM (Biolog Inc. Hayward, Canada) certain isolates were characterised on the basis of their carbon source utilisation. The system analyses the ability of the utilization of 95 single carbon sources simultaneously thus allows of detecting the slight differences among the strains. The authors also evaluated the relationships among the strains according to their carbon source utilization.



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