Eimeria and Cryptosporidium in Estonian dairy farms in regard to age, species, and diarrhoea

Lassen, Brian; Viltrop, Arvo; Raaperi, Kerli; Järvis, T.

doi:10.1016/j.vetpar.2009.08.022

Cited by 45 publications

(50 citation statements)

References 29 publications

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“…On the other hand, for E. bovis, the frequency found (23.2%) was very similar to the findings in the other two studies. These results indicate that in Brazil, E. bovis is one of the most important species, given that it has repeatedly been found to be the most frequent species in Brazil (REBOUÇAS et al, 1994;LASSEN et al, 2009a;REHMAN et al, 2010).…”

Section: Resultsmentioning

confidence: 58%

“…According to the same authors, these factors impair the establishment of an adequate immune response, which would be the determining factor for resistance to coccidiosis. It is important to emphasize that, even in the subclinical form, the lesions caused by different species of this parasite may be related to lower nutrient absorption, with an effect on the performance, health and production of the animals (LASSEN et al, 2009a).…”

Section: Resultsmentioning

confidence: 99%

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Frequency of species of Eimeria in females of the holstein-friesian breed at the post-weaning stage during autumn and winter

Bruhn

Lopes

Demeu

et al. 2011

Rev. Bras. Parasitol. Vet.

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The frequency of species of the genus Eimeria in a dairy herd in the municipality of Boa Esperança, Southern region of the State of Minas Gerais was assessed. From 37 females of the Friesian breed aged three to seven months, 259 feces samples were analyzed between May and September 2008. The examinations to quantify oocysts per gram of feces (OPG) and identify Eimeria species were conducted at the Veterinary Parasitology Laboratory of the Federal University of Lavras. Eleven species of Eimeria were identified, namely: E. bovis (23.2%), E. zuernii (22.6%), E. ellipsoidalis (20.3%), E. cylindrica (14.1%), E. subspherica (5.4%), E. canadensis (3.5%), E. alabamensis (2.4%), E. auburnensis (2.4%), E. pellita (2.1%), E. brasiliensis (2%) and E. bukidnonensis (1.9%). E. bovis, E. zuernii and E. ellipsoidalis were the most frequent and the ones with the highest oocyst shedding over time (p < 0.05). Differences in OPG counts were found between most months studied (p < 0.05). The large number of Eimeria species found, in particular E. bovis and E. zuernii, indicates that Eimeria sp. has significant pathogenic potential in dairy cattle in the South of Minas Gerais.

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Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Frequency of species of Eimeria in females of the holstein-friesian breed at the post-weaning stage during autumn and winter

Bruhn

Lopes

Demeu

et al. 2011

Rev. Bras. Parasitol. Vet.

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show abstract

“…In the south of Minas Gerais, in addition to E. bovis, E. zuernii is also highly disseminated among calves, thus causing concern precisely because these are the species that are considered to be most pathogenic and most frequent among young cattle (TAUBERT et al, 2008;LASSEN et al, 2009 Bianchin et al (1992), Trichostrongylus spp. is a genus that naturally competes with Haemonchus spp.…”

Section: Resultsmentioning

confidence: 99%

Occurrences of Eimeria spp. and gastrointestinal nematodes in dairy calves in southern Minas Gerais, Brazil

Bruhn

Júnior

Carvalho

et al. 2012

Rev. Bras. Parasitol. Vet.

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The aim of this cross-sectional observational study was to determine the frequency and factors associated with infection by Eimeria spp. and gastrointestinal nematodes in 356 calves on 20 dairy farms located in southern Minas Gerais, Brazil. Ten species of Eimeria spp. were identified, of which E. bovis (37.6%) and E. zuernii (17.9%) were the most frequent. From fecal cultures, four genera of gastrointestinal nematodes were recovered, of which Cooperia spp. (74.6%) and Haemonchus (19.4%) were the most frequent. Variables relating to higher levels of technology used on dairy farms showed a significant association (p < 0.05) with higher OPG and EPG counts, and are discussed in this study.Keywords: EPG, OPG, fecal cultures, risk factors. ResumoO objetivo deste estudo foi determinar a frequência e os fatores associados à infecção por Eimeria spp. e nematódeos gastrintestinais, em 356 bezerras provenientes de 20 rebanhos leiteiros, localizados no sul de Minas Gerais, Brasil. Foram identificadas dez espécies de Eimeria spp., sendo E. bovis (37,6%) e E. zuernii (17,9%) as mais frequentes. Nas coproculturas, foram recuperados quatro gêneros de nematódeos gastrintestinais, sendo os mais frequentes Cooperia spp. (74,6%) e Haemonchus spp. (19,4%). Variáveis relacionadas a um maior nível de tecnificação das propriedades leiteiras apresentaram associação significativa (p < 0,05), com maiores contagens de OoPG e OPG, e são discutidas neste estudo.

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“…Gräfner et al (1985) also described the highest excretion rates approximately 2-3 weeks after rehousing. In Estonia, Lassen et al (2009b) recently identified a weakly negative relationship between age and extent of infestation. Because of the different management systems used and their possible influence on the epidemiology of coccidiosis, data were collected on various housing-specific factors in a questionnaire.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Eimeria bovis and Eimeria zuernii in German cattle herds and factors influencing oocyst excretion

et al. 2011

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The present study was designed to investigate the prevalence of the pathogenic coccidia species Eimeria bovis and Eimeria zuernii in shed-reared animals in German dairy and fattening facilities. Samples were obtained from 65 cattle farms distributed randomly across all the regions of Germany regardless of the occurrence of clinical problems. The samples were obtained rectally. Faecal consistency and the total number of oocysts per gram of faeces (OPG) were determined, along with the OPG values for E. bovis and E. zuernii. A questionnaire was completed for each farm to record information about herd size and management, along with individual animal data. Eimeria oocysts were detected in 62 of these farms, which give a prevalence of 95.4%. The farm prevalence of the pathogenic species was 76.9% for E. bovis and 83.1% for E. zuernii. The number of oocysts excreted could not be correlated significantly with farm type or farm management but depended on the floor type, the age of the calves and the time after rehousing. Furthermore, there was a positive correlation between OPG and the observation of diarrhoea. E. zuernii had a greater influence on the occurrence of diarrhoea than E. bovis. This study confirms that herd management frequently does not meet the requirements of effective coccidia control despite the fact that the pathogenic coccidia E. bovis and E. zuernii are ubiquitous in German cattle populations.

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Eimeria and Cryptosporidium in Estonian dairy farms in regard to age, species, and diarrhoea

Cited by 45 publications

References 29 publications

Frequency of species of Eimeria in females of the holstein-friesian breed at the post-weaning stage during autumn and winter

Frequency of species of Eimeria in females of the holstein-friesian breed at the post-weaning stage during autumn and winter

Occurrences of Eimeria spp. and gastrointestinal nematodes in dairy calves in southern Minas Gerais, Brazil

Prevalence of Eimeria bovis and Eimeria zuernii in German cattle herds and factors influencing oocyst excretion

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