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Seroprevalence of Toxoplasma gondii and Neospora caninum infection in dairy cows in subtropical southern China

Published online by Cambridge University Press:  02 May 2012

M. J. XU ,
Q. Y. LIU ,
J. H. FU ,
A. J. NISBET ,
D. S. SHI ,
X. H. HE ,
Y. PAN ,
D. H. ZHOU ,
H. Q. SONG  and
X. Q. ZHU
M. J. XU*
Affiliation:
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, People's Republic of China
Q. Y. LIU
Affiliation:
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, People's Republic of China Animal Reproduction Institute, Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization, Guangxi University, Nanning 530005, People's Republic of China
J. H. FU
Affiliation:
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, People's Republic of China College of Animal Science, South China Agricultural University, Guangzhou 510642, People's Republic of China
A. J. NISBET
Affiliation:
Parasitology Division, Moredun Research Institute, Pentlands Science Park, Midlothian EH26 0PZ, Scotland, UK
D. S. SHI
Affiliation:
Animal Reproduction Institute, Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization, Guangxi University, Nanning 530005, People's Republic of China
X. H. HE
Affiliation:
College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
Y. PAN
Affiliation:
Animal Reproduction Institute, Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization, Guangxi University, Nanning 530005, People's Republic of China Guangxi Veterinary Research Institute, Nanning 530001, People's Republic of China
D. H. ZHOU
Affiliation:
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, People's Republic of China
H. Q. SONG
Affiliation:
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, People's Republic of China
X. Q. ZHU*
Affiliation:
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, People's Republic of China College of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, People's Republic of China
*
*Corresponding author: State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, CAAS, Lanzhou 730046, People's Republic of China. Tel: +86 931 8342837. Fax: +86 931 8340977. E-mail: mjxu@yahoo.cnxingquanzhu1@hotmail.com
*Corresponding author: State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, CAAS, Lanzhou 730046, People's Republic of China. Tel: +86 931 8342837. Fax: +86 931 8340977. E-mail: mjxu@yahoo.cnxingquanzhu1@hotmail.com
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Summary

Toxoplasma gondii and Neospora caninum are closely related protozoan parasites which cause lowered production and increased abortion in dairy cows. The aim of the present study was to determine the seroprevalence of T. gondii and N. caninum infection in dairy cows in the Guangxi Zhuang Autonomous Region (GZAR), subtropical southern China. In total, 875 serum samples were collected from the tail veins of dairy cows in 6 main dairy cow-rearing districts of 4 administrative cities in GZAR. The samples were surveyed for T. gondii antibody using the Indirect Haemagglutination Test (IHA), and 365 of the serum samples were examined for N. caninum antibody by indirect Enzyme-Linked Immunosorbent Assay (ELISA). The overall seroprevalence of T. gondii in dairy cows was 13·71% (120/875), and the average seroprevalence of N. caninum was 15·07% (55/365). There were significant differences in the seroprevalence of N. caninum infection between different districts (P = 0·002, χ2 = 9·261). The highest prevalences of T. gondii and N. caninum were found in cows older than 8 years and those that had completed 5–6 pregnancies. Five cows (1·37%) presented antibodies against both T. gondii and N. caninum, and dairy cows with both T. gondii and N. caninum antibodies had higher abortion rates. The present results indicate widespread exposure of dairy cows to T. gondii and N. caninum in GZAR, subtropical southern China.

Keywords

dairy cowToxoplasma gondiiNeospora caninumseroprevalenceindirect haemagglutination test (IHA)indirect enzyme-linked immunosorbent assay (ELISA)China
Type
Research Article
Information
Parasitology , Volume 139 , Issue 11 , September 2012 , pp. 1425 - 1428
Copyright
Copyright © Cambridge University Press 2012

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