Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXVIII, Issue 1
Written by Emoke PALL, Diana OLAH, Adela CHIRA, Gheorghiță DUCA, Marina SPÎNU, Carmen Dana ȘANDRU, Mihai CENARIU, Emilia UNGUREANU, Aurel VASIU
Abortion is one of the economically important pathological implications of salmonellosis in sheep. Salmonella enterica subspecies enterica serotype abortusovis is the sheep-specific abortive serotype. Regional endemic Salmonella abortions also lead to calving of dead offspring and reduced viability, diseases in lambs from infected dams. The present study focused on the description of two outbreaks of S. abortusovis infection, with special reference to the epidemiological situation in Northwestern Romania, in the winter of 2020-2021. Two herds in which the morbidity rate (abortion) in the last period of gestation was between 13.92% - 16.66% were studied. Fetal parenchymal organs and gastric contents were harvested and processed using classical microbiological methods. Bacterial strains were confirmed by biochemical and serological methods and were identified as Salmonella abortusovis serogroup B, serotype BO. Antimicrobial susceptibility was evaluated using agar diffusion method. Multidrug resistance was found in six of these strains; all were resistant to sulfatrimethoprim and doxycycline, one to erythromycin and one to ciprofloxacin. In order to avoid economic damage in regions known to have enzootic potential, immunoprophylaxis in dams is strongly recommended.
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