Bacterial Pathogens Recovered from Domestic Animals and their in Vitro Susceptibility Testing to Twelve Antimicrobial Agents PDF

Keywords

Saudi Arabia, antimicrobial, bacteriology

Abstract

A bacterial examination of 112 necropsy tissue specimens (livers, spleens, lungs, lymph nodes) from domestic animals including cows, sheep, goats and chickens revealed that 55 (49.11%) of the samples were positive bacteria. The 9 bacterial genera most commonly encountered and their incidences were as follows: Escherichia (15.18%), Pseudomonas (8.93%), Pastuerella (Past. haemolytica 8.04% and Past. multocida 0.89%), Streptococcus (4.46%), Corynebacterium (4.46%), Porteus (2.68%), Salmonella (2.68%), Klebsiella (0.89%), and Staphylococcus (S. aureus 0.89%). Of 61 mastitic milk samples examined, 44 (72.13%) showed bacterial contamination. Escherichia coli was the predominant potential pathogen in milk followed by 6 other bacterial floras, namely, Staphylococcus aureus, Streptococcus, Alcaligenes feacalis, Pseudomonas aeruginosa, Proteus and Klebsiella pneumoniae. Susceptibility testing of the bacterial isolates to 12 antimicrobial agents showed that the five most effective drugs tested were chloramphenicol, furazolidone, nitrofurantoin, sulfathiazole and polymyxin.