China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (7): 2725-2734.doi: 10.16431/j.cnki.1671-7236.2022.07.031

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Investigation on the Infection of Equine Intestinal Parasite in Partial Cities in Guangdong Province

LIANG Yingxin1,2,3, CHEN Zejia1,2,3, LI Jichao1,2,3, CUI Xiaoxiao1, FENG Qianqi1, LI Shoujun1,2,3, CHEN Aolei1,2,3   

  1. 1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China;
    2. Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, Guangzhou 510642, China;
    3. Guangdong Technological Engineering Research Center for Pets, Guangzhou 510642, China
  • Received:2022-01-06 Online:2022-07-05 Published:2022-06-29

Abstract: 【Objective】 This study was aimed to investigate the infection status of the equine intestinal parasites in Guangdong, offer guidance for the prevention and control of parasites infection in the region.【Method】 375 fresh horse fecal samples were collected from 24 farms in 7 cities in Guangdong province,which were processed by the saturated salt solution and saturated sucrose solution separately.Eggs/oocysts were observed with the microscope and identified based on literatures.The number of eggs/oocysts per gram of feces (EPG) was calculated by McGrady counting method.The infection rate and infection intensity were calculated.Fecal egg count reduction test (FECRT) was performed on positive samples with EPG>500 to test whether anthelmintic resistance existed.In addition,the DNA of 5 young foals under 1-year-old was extracted from fecal samples for Cryptosporidium detecting using nested PCR method.【Result】 120 of 375 samples were tested positive for parasite eggs/oocysts,and the total infection rate was 32.00%.A total 4 intestinal parasites were identified,which were Strongylus app.,Parascaris equorum,Strongyloides westeri and Oxyuris equi,and the total infection rates were 30.40%,3.70%,0.80% and 0.30%,respectively.The total infection rate of horses aged from 1-4 years old was significantly higher than that of other ages (P<0.05),but there was no significant difference in parasitic infection between different genders ((P>0.05).The investigated horses were mainly with low EPG (<200),accounting for 83.47% of the total number of horses.FECRT results showed that the commonly used anthelmintic drugs (mainly composed of ivermectin and albendazole) were effective in the equestrian club where the sample was located and there was no evidence of anthelmintics resistance.5 fecal samples of foals under 1-year-old were negative for Cryptosporidium.【Conclusion】 The parasite control situation of equestrian clubs in some areas of Guangdong province was generally good.There were differences in parasite control effects among equestrian clubs in the region.It was suggested that all equestrian clubs in the region should strengthen the monitoring of intestinal parasites of horses,and use drugs rationally according to the monitoring situation in the field,so as to avoid the prevalence of parasites in the field to develop resistance to the used deworming drugs.

Key words: horse; intestinal parasites; epidemiology investigation; anthelmintic resistance

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