Etlik Veteriner Mikrobiyoloji Dergisi, cilt.33, sa.2, ss.1-9, 2022 (Hakemli Dergi)
In this study, the presence and antimicrobial susceptibility of Mannheimia haemolytica and Pasteurella multocida pathogens in 200 sheep-lamb lung samples with pneumonia were investigated in 7 provinces of the Aegean region between 2019-2021. The tissues of the animals were inoculated into 7% blood agar and then incubated at 37oC for 24-48 hours. Gram staining was performed on the pure colonies and Gram-negative, oxidase-positive samples were confirmed with the Vitek 2 system. An Antibiogram test was performed and amoxicillin-clavulanic acid, enrofloxacin, erythromycin, florfenicol, gentamicin, oxytetracycline, sulfamethoxazole-trimethoprim, tulathromycin discs were used. M. haemolytica was detected in 20(10%) of the samples and P. multocida was detected in 22(11%) of the samples. 20 of the P. multocida isolates (91%) were susceptible to amoxicillin-clavulanic acid, florfenicol, and tulathromycin, and 20 of the M. haemolytica isolates (100%) were susceptible to enrofloxacin, oxytetracycline, florfenicol, and tulathromycin. Subsequently, 6 of the P. multocida isolates (27%) were resistant to erythromycin and oxytetracycline, and 5 of the M. haemolytica isolates (25%) were to sulfamethoxazole-trimethoprim. As a result, M. haemolytica and P. multocida can be seen with similar percentages as pneumonic agents in sheep-lamb pneumonia cases in the Aegean region, but effective treatment can be done with the right antibiotic selection.