First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina

Olmos, Lh.; Caro, Luis Adrián Colque; Avellaneda-Cáceres, Agustín; Medina, Diego; Sandoval, V.E.; Aguirre, D. H.; Micheloud, Juan Francisco

doi:10.1016/j.vprsr.2020.100429

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…The most prevalent species in this study were E. ovinoidalis and E. crandallis. These species are commonly reported in sheep worldwide (Saratsis et al, 2011;Lopes et al, 2013;El-Alfy et al, 2020;Olmos et al, 2020;Al-Neama et al, 2021), and the predominance could be due to their higher reproductive efficiency compared to other species (Catchpole et al, 1976). Eimeria ovinoidalis and E. crandallis are pathogenic, and they are responsible for clinical coccidiosis, even in adult sheep (Olmos et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Prevalence and risk factors of Eimeria spp. natural infection in sheep from northern Paraná, Brazil

Carneiro

Sasse

Silva

et al. 2022

Rev. Bras. Parasitol. Vet.

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The present study aimed to perform an epidemiological and morphological identification of Eimeria infection in sheep in Brazil. Fecal samples from sheep were collected from 20 farms in northern Paraná, Brazil. An epidemiological questionnaire was used to evaluate the risk factors. Fecal samples containing oocysts per gram of feces (OoPG) ≥1000 were subjected to the modified Willis-Mollay method to perform oocyst identification. Sporulated oocysts were observed microscopically for morphological identification. A total of 807 fecal samples were collected. Based on the morphological characteristics of the sporulated oocysts, 10 species of Eimeria were identified, with main species observed: Eimeira ovinoidalis (98.1%), Eimeria crandallis (87.6%), Eimeria parva (79.1%), and Eimeria bakuensis (60.8%). Only 2.6% (7/268) of the sheep were infected with a single species, 4.8% (13/268) contained two different species, and 92.5% (248/268) were infected with three or more species. The analysis of risk factors showed that an intensive rearing, no rotation of pasture, dirt, and slatted floors, and age up to 12 months were associated with infection. This study showed a high prevalence of Eimeria natural infection in sheep from northern Paraná, Brazil. Furthermore, based on the risk factors, good management and hygiene practices must be employed to avoid infection.

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Section: Discussionmentioning

confidence: 99%

Prevalence and risk factors of Eimeria spp. natural infection in sheep from northern Paraná, Brazil

Carneiro

Sasse

Silva

et al. 2022

Rev. Bras. Parasitol. Vet.

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“…After lambing/kidding, adult animals can shed the protozoa due to the peri-parturient relaxation of immunity [ 19 , 20 , 21 ], which occurs for three weeks before and after parturition [ 22 ]. This contributes to the dissemination of high numbers of the protozoa in the farm environment and the subsequent infection of lambs/kids [ 18 ].…”

Section: Discussionmentioning

confidence: 99%

Protozoan Parasites in Adult Dairy Small Ruminants and Potential Predictors for Their Presence in Faecal Samples

et al. 2022

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There is a scope to study protozoan infections in adult ewes and does, as these animals can act as reservoirs of infection for lambs and kids, for which these pathogens are harmful. The objectives of this study were to describe the prevalence of protozoan infections in faecal samples from adult sheep and goats on dairy farms across Greece and to evaluate farm-related factors potentially associated with the presence of protozoan infections in these animals. A cross-sectional study was performed on 325 sheep and 119 goat farms throughout Greece; faecal samples were collected from ewes and does and processed for the identification of protozoan parasites. Eimeria oocysts were found in faecal samples from 69% of farms (72% of sheep farms and 61% of goat farms), Giardia cysts in samples from 33% of farms (33% of sheep farms and 34% of goat farms) and Cryptosporidium oocysts in samples from 8% of farms (7% of sheep farms and 11% of goat farms). In a multivariable analysis, for the presence of Eimeria in samples from sheep farms, the lack of a designated building for lambs emerged as a significant factor; for the presence of Giardia in samples from goat farms, the availability of a main building for animals emerged as a significant factor; for the presence of Cryptosporidium, the lack of grazing and the management system emerged as the main significant factors in sheep and goat farms, respectively. Protozoa were found significantly more frequently in samples collected from farms on which farmers considered diarrhoea as an important health problem in their lambs/kids.

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“…Coccidiosis is a globally distributed disease, but it is a very important animal health problem in developing countries (Squire et al 2019), reported to be distributed in several countries in all continents (Macrelli et al 2019;Alcala-Canto et al 2020;Jansen et al 2020;Olmos et al 2020;Silva et al 2020;Trejo-Huitrón et al 2020;Gondipon and Malaka 2021;Thanasuwan et al 2021;Mohammed et al 2021;Yan et al 2021). Pathogens that cause coccidiosis in ruminants are found in temperate, subtropical and tropical climates.…”

Section: Epidemiologymentioning

confidence: 99%

Coccidiosis in Ruminants

2022

Int J Vet Sci

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First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina

Cited by 5 publications

References 20 publications

Prevalence and risk factors of Eimeria spp. natural infection in sheep from northern Paraná, Brazil

Prevalence and risk factors of Eimeria spp. natural infection in sheep from northern Paraná, Brazil

Protozoan Parasites in Adult Dairy Small Ruminants and Potential Predictors for Their Presence in Faecal Samples

Coccidiosis in Ruminants

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