唐山地区奶犊牛主要腹泻相关病原的流行病学调查

doi:10.16431/j.cnki.1671-7236.2023.07.025

Abstract

Abstract: 【Objective】 The purpose of this study was to understand the epidemic status of infectious diarrhea pathogens in calves from 13 counties (cities, districts) of Tangshan, and to provide clinical data for the effective prevention and control of diarrhea in calves in this area.【Method】 788 diarrhea fecal samples from 38 dairy farms in Tangshan were used to detect 9 kinds of pathogens Bovine viral diarrhea virus (BVDV), Bovine rotavirus (BRV), Bovine coronavirus (BCV), Escherichia coli, Salmonella, Clostridium perfringens, Coccidia, Cryptosporidium and Giardia lamblia, and the positive rate and mixed infection were analyzed.【Result】 Among 788 calf diarrhea feces samples, the highest positive rate was Escherichia coli, which was 43.53% (343/788).In all tested areas, Luannan county had the highest infection rate of BVDV, with a positive rate of 45.38% (59/130).The infection rates of BRV and BCV in Hangu district were the highest, with the positive rates of 55.00% (22/40) and 37.50% (15/40), respectively.The infection rates of E.coli and G.lamblia in Guye district were the highest, with the positive rates of 68.75% (11/16) and 18.75% (3/16), respectively.The infection rate of Salmonella in Lunan district was the highest, with a positive rate of 35.89% (14/39).The infection rate of C.perfringens in Qian'an county was the highest, with a positive rate of 20.21% (19/94).The infection rates of Cryptosporidium and Coccidia in Lubei district were the highest, with the positive rates of 48.48% (16/33) and 57.57% (19/33), respectively.From the sampling season, the infection rate of BRV was the highest in spring and summer, with the positive rates of 27.71% (46/166) and 39.58% (114/288), respectively.The infection rate of E.coli was the highest in autumn, with the positive rate of 54.08% (106/196).In winter, BVDV infection was the main infection, with the positive rate of 52.17% (72/138).Judging from the mixed infection situation, the double mixed infection of BRV+BCV was the main, and the positive rate was 8.37% (66/788) and there was no mixed infection of five or more pathogens.【Conclusion】 There were 9 kinds of pathogenic infections in diarrhea dairy calves from 13 counties (cities, districts) of Tangshan and the highest positive rate was bacterial pathogen E.coli, followed by viral pathogens BVDV and BRV.

Key words: Tangshan area; dairy calves; infectious diarrhea pathogen; distribution characteristics

CLC Number:

S858.23

CHANG Liyun, LIU Zhiyong, LI Huawei, ZHAO Na, LI Chenghui, QIN Jianhua. Epidemiological Investigation of the Main Diarrhea Related Pathogens in Dairy Calves in Tangshan Area[J]. China Animal Husbandry and Veterinary Medicine, 2023, 50(7): 2854-2864.

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Epidemiological Investigation of the Main Diarrhea Related Pathogens in Dairy Calves in Tangshan Area

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