HomePhilippine Journal of Veterinary Medicinevol. 42 no. 1 (2005)

Pleuropneumonia in Calves Associated with Experimental Infection with Mycoplasma capricolum Subspecies capricolum

Adebowale T.P Ajuwape | Adeyemi I. Adetosoye | Julius O. Ikheloa | Olugbenga O. Alaka | Victor O. Taiwo | Olumyiwa A. Talabi | Ebenezer B. Otesile | Matthew O. Ojo

Discipline: Veterinary Medicine

 

Abstract:

The pathogenicity of Mycoplasma capricolum subspecies capricolum in calves was investigated. Two calves were infected with 10 ml of 1 x 10 Colony Forming Units per milliliter (CFU/ml) of Mycoplasma capricolum subspecies capricolum (Mcc) each, while another two calves served as control. Their rectal temperature (RT) and packed cell volume (PCV) were monitored until the infected group died 65.5 ± 2.1 days post inoculation. The mean RT of each of the control calves (37.9±0.5˚C and 38.1±0.2˚C) was significantly (P<0.05) lower than that of the Mcc-infected calves (39.9±0.9˚C and 40.5±0.5˚C) while mean PCV of the two groups showed no significant difference. The lesions include fibrinous-interstitial pneumonia, characterized by congestion, oedema and fibrinous exudates, neutrophils, macrophages and few lymphocytes in widened interstitium. Furthermore, pinkish casts were found in the renal tubules with multifocal interstitial inflammatory cell aggregations in the cortex and medulla. It is therefore advisable that goats and sheep as well as cattle should be vaccinated against Mycoplasma capricolum subsp. capricolum to prevent economic losses referable to this organism which may be encountered under natural exposure when rearing these animals together. Moreover, proper Laboratory diagnosis should be carried out on suspected cases of pleuropneumonia observed in abattoirs to determine the Mycoplasma species involved