Epidemiological characteristics of brucellosis in sheep and goats in Bulgaria: 2005-2008.

Aim: To analyse and present the epidemiological and epizootological situation of brucellosis in humans, sheep and goats caused by Brucella melitensis.

Methods: The veterinary health services analyzsd epidemiological reports, as well as other official documents, in relation to the epidemiology and the measures undertaken for control of brucellosis in Bulgaria, 2005-08.

Results: In Bulgaria animal infections caused by Brucella melitensis have been eradicated since 1941.

[Drug resistance and virulence of Staphylococcus aureus strains isolated from cows with endometritis].

A study was carried out on the drug resistance as associated with the virulence of Staphylococcus aureus strains isolated from cows with endometritis. Hirota's method was employed to ascertain that resistance to penicillin, erythromycin, neomycin, and kanamycin was governed by plasmids. It was found at the same time that, fairly often, with the elimination of some of the resistant markers the virulence of the strain variants also dropped.

[Sensitivity of Ps. aeruginosa to disinfectant agents].

Pseudomonas aeruginosa strains, isolated from semen of bulls as well as from the surrounding milieu at Artificial Insemination Stations, were tested for susceptibility to disinfection agents, such as fesiasept, concentrate C4, and chloramine with 25% active chlorine and sodium hydroxide. The investigation was carried out in vitro under practical conditions too. The analysis of results led to the conclusion that in the case of environmental contamination with Ps.