Ans. B. Staphylococcus aureusExplanationAmong animal bites, dog bites are most common, followed by cat bites.Approximately 15 to 20% of dog bite wounds and more than 50% of cat bite wounds become infected.For dog bite infections, Staphylococcus aureus and streptococcal species are the most commonly isolated pathogens, with Pasteurella and other organisms next in frequency.For cat bite infections, Pasteurella spp. are the most common pathogens.The zoonotic species Capnocytophaga canimorsus and C. cynodegmi are normal inhabitants of the oral cavity of dogs and cats. Zoonotic-associated infections arise via exogenous introduction of bacteria into wounds from penetrating traumas (dog bite) or by inapparent inoculation of bacilli into abraded surfaces or tissues via intimate contact with pets.