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http://dx.doi.org/10.3347/kjp.2015.53.1.113

Cryptosporidium suis Infection in Post-Weaned and Adult Pigs in Shaanxi Province, Northwestern China  

Lin, Qing (College of Veterinary Medicine, Northwest A&F University)
Wang, Xing-Ye (College of Veterinary Medicine, Northwest A&F University)
Chen, Jian-Wen (College of Veterinary Medicine, Gansu Agriculture University)
Ding, Ling (College of Veterinary Medicine, Northwest A&F University)
Zhao, Guang-Hui (College of Veterinary Medicine, Northwest A&F University)
Publication Information
Parasites, Hosts and Diseases / v.53, no.1, 2015 , pp. 113-117 More about this Journal
Abstract
Cryptosporidium spp., ubiquitous enteric parasitic protozoa of vertebrates, recently emerged as an important cause of economic loss and zoonosis. The present study aimed to determine the distribution and species of Cryptosporidium in post-weaned and adult pigs in Shaanxi province, northwestern China. A total of 1,337 fresh fecal samples of post-weaned and adult pigs were collected by sterile disposable gloves from 8 areas of Shaanxi province. The samples were examined by Sheather's sugar flotation technique and microscopy at${\times}400$ magnification for Cryptosporidium infection, and the species in positive samples was further identified by PCR amplification of the small subunit (SSU) rRNA gene. A total of 44 fecal samples were successfully amplified by the nested PCR of the partial SSU rRNA, with overall prevalence of 3.3%. The average prevalence of Cryptosporidium infection in each pig farms ranged from 0 to 14.4%. Species identification by sequencing of SSU rRNA gene revealed that 42 (3.1%) samples were Cryptosporidium suis and 2 (0.15%) were Cryptosporidium scrofarum. C. suis had the highest prevalence (7.5%) in growers and the lowest in breeding pigs (0.97%). C. suis was the predominant species in pre-weaned and adult pigs, while C. scrofarum infected pigs older than 3 months only. A season-related difference of C. suis was observed in this study, with the highest prevalence in autumn (5.5%) and the lowest (1.7%) in winter. The present study provided basic information for control of Cryptosporidium infection in pigs and assessment of zoonotic transmission of pigs in Shaanxi province, China.
Keywords
Cryptosporidium; pig; SSU rRNA; Shaanxi province; China;
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