Surveys of Cryptosporidium and Giardia duodenalis have rarely been performed in cats in China,despite their significance for public health.In this study,188 fecal samples were collected from five pet hospitals,two pet shops,and private owners in Zhengzhou,China,and were examined for the presence of Cryptosporidium oocysts and G.duodenalis cysts by microscopy.The overall infection rates of Cryptosporidium and G.duodenalis were 2.1%(4/188)and 2.7%(5/188),respectively.Cryptosporidium felis was identified in 4 isolates by DNA sequencing of the small subunit ribosomal RNA(SSU rRNA)and 70-kDa heat shock protein(HSP70)genes.Five G.duodenalis isolates was assigned to assemblage F by sequence analysis of the triosephosphate isomerase(TPI)and glutamate dehydrogenase(GDH)genes.Although C.felis was the only zoonotic species identified in this study,it is possible that cats are a potential source of emerging zoonotic infections in some parts of China because the large numbers of cats are in close contact with humans.More studies are required to better understand the transmission and public-health significance of cryptosporidiosis and giardiasis in cats in various areas.