Eimeria spp. infection in lambs from southern Brazil

Martins, Natália Soares; Motta, Sara Patron da; Santos, Carolina Caetano dos; Moreira, Andrios Silva; Farias, Nara Amélia da Rosa; Ruas, Jerônimo Lopes

doi:10.1590/1678-5150-pvb-6745

Cited by 4 publications

(8 citation statements)

References 12 publications

(34 reference statements)

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“…We observed that 82.03% of sheep were infected with Eimeria spp. Similar results were found in previous studies, which showed a prevalence of 94.6% and 85.98% in sheep and lambs from the states of the Rio de Janeiro and the Rio Grande do Sul, respectively (Hassum & Menezes, 2005;Martins et al, 2020). Studies conducted worldwide have shown a prevalence of Eimeria infection ranging from 57.7% in Egypt to 92.9% in China (Wang et al, 2010; Braz J Vet Parasitol 2022; 31(1): e017421 5/7…”

Section: Discussionsupporting

confidence: 83%

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: Discussionsupporting

confidence: 83%

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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“…Nevertheless, some animals presented at least one suggestive clinical sign of coccidiosis, such as poor body condition, softer fecal pellets, rough hair coat, and apathy. Similar observations were described in a preliminary study, where animals with high prevalence and Eimeria oocyst elimination had no distinction in stool consistency (Martins et al, 2020). In fact, the high prevalence and absence or non-specificity of clinical signs indicates the occurrence of subclinical coccidiosis in the study herds.…”

Section: Grazingsupporting

confidence: 87%

“…It is noteworthy that polyparasitism can aggravate the pathogenic effect of coccidia and may trigger more serious effects (Chartier & Paraud, 2012). Previous studies conducted in Brazil have already described the presence of these species infecting sheep with variable prevalence (Lopes et al, 2013;Macedo et al, 2019;Martins et al, 2020;Souza et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

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Ovine Eimeria infections in southern Brazil – prevalence and risk factors

Martins

Motta

Santos

et al. 2022

Semina: Ciênc. Agrár.

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Eimeria infections are common in sheep industry worldwide, however information about their epidemiology is scarce in southern state of Rio Grande do Sul, Brazil. Therefore, a cross-sectional study was carried out to determine the prevalence, species characterization, and associated risk factors between Eimeria species and sheep flocks. Fecal samples from 428 sheep from 21 farms were tested for the presence of oocysts. The overall prevalence of Eimeria spp. was 68.69% and was significantly affected by age of the sheep, with highest prevalence in animals under 18 months of age. Eight Eimeria species were identified. Eimeria ovinoidalis (85.71%) was the most common, followed by Eimeria crandallis (80.95%), Eimeria granulosa (78.95%), Eimeria ahsata (61.90%), Eimeria faurei (42.86%), Eimeria bakuensis (38.10%), Eimeria punctata (14.29%), and Eimeria pallida (9.52%). All herds were positive, with concomitant infections. Among management and husbandry practices; farm size, animal density, farming system, breeding objectives, and pasture system influenced the prevalence of Eimeria species. The infection was more prevalent on small farms with high animal density, in sheep raised for meat, semi-intensive system, and rotational grazing (p < 0.05). The wide distribution of this protozoan and the high frequency of pathogenic species show the importance and potential damage of coccidiosis in sheep flocks in Rio Grande do Sul.

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“…Furthermore, management directly influences the characteristics of Eimeria infections. Previous studies demonstrated that intensive and semi-intensive farming systems could facilitate the dissemination of Eimeria species ( Lopes et al, 2013 ; Martins et al, 2020 ; Tomczuk et al, 2015 ). In intensive production systems, a high population density facilitates the transmission of the protozoan, with a large number of oocysts available in the environment ( Lima, 2004 ).…”

Section: Discussionmentioning

confidence: 99%

Gastrointestinal Parasites in Sheep from the Brazilian Pampa Biome: Prevalence and Associated Factors

Martins

Santos

Motta³

et al. 2022

Braz. J. Vet. Med.

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Parasitic infections are common in sheep farming worldwide. A cross-sectional study was carried out to determine the prevalence and associated risk factors among gastrointestinal parasites and sheep herds from the Brazilian Pampa biome, Rio Grande do Sul state, Brazil. Twenty-one farms were visited, where rectal faecal samples were individually collected from 309 animals. The sheep industry on the studied farms was characterised by small farms with a low level of technification, an extensive grazing system and meat production. Of all samples analysed, strongyle nematodes had the highest prevalence (77.02%), followed by Eimeria spp. (70.55%), Moniezia expansa (20.39%) and Strongyloides papillosus (17.48%). Mixed infection, between helminths and protozoans, was detected in 68.61% of samples. All herds were positive for strongyle and Eimeria spp. A predominance of Haemonchus spp. and Trichostrongylus spp. nematodes was observed in the herds. Younger animals were significantly more affected by Eimeria and M. expansa . In the semi-intensive and intensive systems, a higher frequency of Eimeria and strongyle infections was observed. Parasite infection was significantly reduced at low animal densities. The Brazilian Pampa region presents a high prevalence of gastrointestinal parasites among sheep; age, breeding system and stocking density were factors associated with parasite infection.

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Eimeria spp. infection in lambs from southern Brazil

Cited by 4 publications

References 12 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

Ovine Eimeria infections in southern Brazil – prevalence and risk factors

Gastrointestinal Parasites in Sheep from the Brazilian Pampa Biome: Prevalence and Associated Factors

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