[1] Ctr Dis Control & Prevent, Div Foodborne Waterborne & Environm Dis, Natl Ctr Emerging & Zoonot Infect Dis, 1600 Clifton Rd, Atlanta, GA 30333 USA
[2] Kafr El Sheikh Univ, Dept Zool, Fac Sci, Kafr Al Sheikh, Egypt
[3] Univ Sadat City, Dept Parasitol, Fac Vet Med, Menoufia, Egypt
[4] Univ Sadat City, Dept Anim Hyg & Zoonoses, Fac Vet Med, Menoufia, Egypt
[5] South China Agr Univ, Coll Vet Med, Guangzhou, Guangdong, Peoples R China