Juan David Valencia Bacca

Juan David Valencia Bacca

University of Sao Paulo, Brazil

Title: Antimicrobial susceptibility of Staphylococci isolated from small animals


Graduated in Veterinary Medicine - University of Environmental and Applied Sciences Bogota - Colombia (2006). Currently MSc student - University of Sao Paulo, Faculty of Veterinary Medicine, Department of Preventive Veterinary Medicine and Animal Health, São Paulo, Brazil. Experience in Preventive Veterinary Medicine with emphasis on infectious diseases. Acting mainly in the Bacteriology and Mycology Laboratory of the FMVZ/USP.


Staphylococcus spp. are clinically important Gram-positive bacteria that are capable of causing a wide variety of diseases in humans and animals. The overuse of antimicrobials can select resistant bacteria strains, that represents a major threat to animal and public healt worlwide. The susceptibity to 19 antimicrobial agents was determined in 75 isolates of canine (70) and feline (5) origin. Among the Staphylococcus 54 (72%) S. pseudointermedius, 17 (22,7%) S. epidermidis, 2 (2,7%) S. aureus, 1 (1,3%) S. scheileferi, 1 (1,3%) Staphylococcus. spp., were isolated. Resistance of isolates to antimicrobials was frequently observed. The percentages of resistance were: 53.33% to erythromycin, 40 % to clindamycin, 27.02% to chloramphenicol, 23% to norfloxacin and ciprofloxacin, 20% to cefadroxil, 18.6% to amoxicilin, cefalexin, gentamicin, and enrofloxacin, 16% to neomycin, 13% doxyciclin. Susceptibility to oxacilin was also tested, 82.6% of the isolates were susceptible, and 17.3% presented intermediate sensitivity. Our results highligthed that members of the Staphylococcus genus often exhibit in vitro resistance to commonly used antimicrobials. Its necessary a judicious use of antibiotics in small animals Veterinary Medicine.