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Abstract
In this study bacteriological examination reveled that the incidence of microorganisms isolated from skin affections in small ruminant (sheep and goats) was recorded that C. pseudotubercubsis, S. aureus and Enterococcus faecium were the most prevalent isolates obtained from lymph node abscesses in sheep in an incidence of 47.7%, 28.7% and 20.6% respectively. The most prevalent bacteria isolated from infected wounds in sheep were S. aureus, Enterococcus faecium, A. pyogenes and E. coli in percentages of 58.7%, 31.5%, 4.3% and 3.3% respectively.
Infected lymph nodes of goats were yielded C. pseudotuberculosis and S. aureus in an incidence of 54% and 36% respectively.
Infected wounds, cysts and umbilicus of goats were revealed S. aureus, A. pyogenes, Enterococcus casseliflavis with an incidence of 31.25%, 31.25% and 25% respectively. These microorganisms were obtained in pure culture.
Incidence of micro organisms isolated from female sheep and goats were great than those of males (42.81: 39.19 respectively).
Also the age of high frequency of infection was in between 6-18 months in both sheep and goat.
Experimental infection was conducted in rabbits using S. aureus and C. pseudotuberculosis. Lesions appeared in rabbits 15 days post inoculation in all inoculated rabbits for S. aureus and in four only from five rabbits for C. pseudotuberculosis.
The in vitro sensitivity of the most predominant microorganisms including C. pseudotuberculosis (10 isolates), Enterococcus Faecium (10 isolates) and S. aureus (10 isolates) which were tested against 12 types of antimicrobial drugs
S. aureus strains was found to be highly sensitive to Enrofloxacin, Ofloxacin, Doxycycline, Rifmpicin, Gentamycin, Ampicillin, Chloramphenicol and Colistin sulphate, while some strains were moderately sensitive to Oxytetracycline and Streptomycin.
C. pseudotubrculosis strains were highly sensitive to Enrofloxacin, Ofloxacin, Rifampicin, Ampicillin, Doxycycline, Oxytetracycline, Gentamycin and Streptomycin while were moderately sensitive to Spectinomycin.
Streptococcus species strains were highly sensitive to Enrofloxacin, Ofloxacin, Rifampicin, Gentaycin, Ampicillin, Streptomycin and Doxycycline while some strains were moderately sensitive to Oxytetracycline, Colistin sulphate, Spectinomycin and Chloramphenicol.