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首页> 外文期刊>Parasite Epidemiology and Control >Prevalence and risk factors for shedding of Cryptosporidium spp. oocysts in dairy calves of Buenos Aires Province, Argentina
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Prevalence and risk factors for shedding of Cryptosporidium spp. oocysts in dairy calves of Buenos Aires Province, Argentina

机译：隐孢子虫 spp的流行和危险因素。阿根廷布宜诺斯艾利斯省奶牛犊中的卵囊

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In order to determine the prevalence and risk factors for shedding of Cryptosporidium spp. in dairy calves, a cross-sectional study was carried out in the northeastern region of Buenos Aires Province, Argentina. Fecal samples from a total of 552 calves from 27 dairy herds were collected, along with a questionnaire about management factors. Cryptosporidium spp. oocysts were detected by light microscopy using Kinyoun staining. Putative risk factors were tested for association using generalized linear mixed models (GLMMs). Oocyst shedding calves were found in 67% (CI 95% = 49–84) of herds (corresponding to a true herd prevalence of 98%) and 16% (CI 95% = 13–19) of calves (corresponding to a true calve prevalence of 8%). Within-herd prevalence ranged from 0 to 60%, with a median of 8%. Cryptosporidium spp. excretion was not associated with the type of liquid diet, gender, time the calf stayed with the dam after birth, use of antibiotics, blood presence in feces, and calving season. However, important highly significant risk factors of oocyst shedding of calves was an age of less or equal than 20 days (OR = 7.4; 95% CI 95% = 3–16; P 0.0001) and occurrence of diarrhea (OR = 5.5; 95% CI 95% = 2–11; P 0.0001). The observed association with young age strongly suggests an early exposure of neonatal calves to Cryptosporidium spp. oocysts in maternity pens and/or an age-related susceptibility. Association with diarrhea suggests that Cryptosporidium spp. is an important enteropathogen primarily responsible for the cause of the observed diarrheal syndrome. Results demonstrate that Cryptosporidium spp. infection is widespread in the study region. Monitoring and control of this parasitic protozoan infection in dairy herds is recommended.
机译：为了确定流行和隐孢子虫属spp的风险因素。在奶牛犊中，在阿根廷布宜诺斯艾利斯省的东北地区进行了横断面研究。收集了来自27个奶牛场的552头小牛的粪便样本，以及有关管理因素的问卷。隐孢子虫使用Kinyoun染色通过光学显微镜检测卵囊。使用广义线性混合模型（GLMM）对推定的风险因素进行关联测试。在67％（CI 95％= 49–84）的牛群中发现了卵囊脱落小牛（对应于真实的牛群患病率98％）和16％（CI 95％= 13–19）的牛犊（对应于真实小牛）患病率8％）。畜群内的患病率从0％到60％不等，中位数为8％。隐孢子虫排泄与流质饮食的类型，性别，小牛出生后与大坝呆在一起的时间，抗生素的使用，粪便中的血液存在和产犊季节没有关系。然而，犊牛卵囊脱落的重要的高度重要的危险因素是年龄小于或等于20天（OR = 7.4; 95％CI 95％= 3–16; P <0.0001）和腹泻的发生（OR = 5.5;年龄小于或等于20天）。 95％CI 95％= 2-11; P <0.0001）。观察到的与年轻人的关联强烈表明，新生小牛较早地暴露于隐孢子虫属。产妇笔中的卵囊和/或与年龄相关的易感性。与腹泻有关提示隐孢子虫属。是重要的肠病原体，主要负责观察到的腹泻综合征。结果表明隐孢子虫属。感染在研究区域很普遍。建议监测和控制奶牛群中这种寄生性原生动物感染。

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