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Background   Cryptosporidium  spp. have been extensively reported to cause significant diarrheal disease in humans and domestic animals. On the contrary, little information is available on the prevalence and characterization of  Cryptosporidium  in wild animals in China, especially in giant pandas. The aim of the present study was to detect  Cryptosporidium  infections and identify  Cryptosporidium  species at the molecular level in both captive and wild giant pandas in Sichuan province, China.    Findings  Using a PCR approach, we amplified and sequenced the 18S rRNA gene from 322 giant pandas fecal samples (122 from 122 captive individuals and 200 collected from four habitats) in Sichuan province, China. The  Cryptosporidium  species/genotypes were identified via a BLAST comparison against published  Cryptosporidium  sequences available in GenBank followed by phylogenetic analysis. The results revealed that both captive and wild giant pandas were infected with a single  Cryptosporidium  species,  C. andersoni , at a prevalence of 15.6 % (19/122) and 0.5 % (1/200) in captive and wild giant pandas, respectively.    Conclusions  The present study revealed the existence of  C. andersoni  in both captive and wild giant panda fecal samples for the first time, and also provided useful fundamental data for further research on the molecular epidemiology and control of  Cryptosporidium  infection in giant pandas.

Prevalence and molecular characterization of Cryptosporidium in giant panda (Ailuropoda melanoleuca) in Sichuan province, China