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

Bruhn, Fábio Raphael Pascoti; Lopes, Marcos Aurélio; Demeu, Fabiana Alves; Perazza, Caio Augusto; Pedrosa, Marcos Ferrazani; Guimarães, Antônio Marcos

doi:10.1590/s1984-29612011000400008

Cited by 26 publications

(36 citation statements)

References 16 publications

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“…Although E. auburnensis and E. wyomingensis were not identified (respectively), they both mentioned E. brasiliensis. Bruhn et al (2011) found a result similar to the present study among milking calves aged from three to seven months in the south of Minas Gerais, except for the presence of E. pellita and E. brasiliensis, thus totaling 11 species of Eimeria spp.…”

Section: Resultssupporting

confidence: 90%

“…These results suggest that in Brazil, E. bovis is one of the most important species because it has repeatedly been found to be the most frequent species in many studies conducted in this country (REBOUÇAS et al, 1994;ALMEIDA et al, 2011;BRUHN et al, 2011). 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.…”

Section: Resultsmentioning

confidence: 73%

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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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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 73%

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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“…oocyst faecal count was also observed previously in other mammalian species (Faber et al, 2002;Taylor et al, 2007;Bruhn et al, 2011;Turner et al, 2012). Moreover, the periparturient increase in the emission of (oo)cysts was also reported for other intestinal protozoa, such as Cryptosporidium parvum and Giardia duodenalis in infected sheep and goats (Xiao et al, 1994;Ortega-Mora et al, 1999;Castro-Hermida et al, 2005).…”

Section: Discussionsupporting

confidence: 77%

Oocyst excretion pattern of three intestinal Eimeria species in female rabbits

2013

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The dynamic change in faecal Eimeria oocyst excretion was evaluated in 10 naturally infected female rabbits, starting from their weaning at 33 d of age until about 1 mo after their second parturition. Faecal samples collected from examined animals were quali-quantitatively analysed to evaluate presence and number of Eimeria oocysts. In addition, isolated Eimeria oocysts were identified at the species level following sporulation. Animals were found to be infected by Eimeria perforans, Eimeria exigua and Eimeria magna and shed Eimeria oocysts after weaning and after parturition. In particular, at 33 d of age all female rabbits examined were negative, while the discharge of Eimeria oocysts started at 39 th day of age and peaked between 46 th and 53 rd day of age. From 81-109 d of age until the first parturition and from 25 d of age of the litters born at the first parturition to the second parturition, all animals resulted negative. After parturition, Eimeria oocyst output occurred from 6 th to 12 th day after the first parturition and from 7 th to 13 th day after the second parturition, while a second period of oocyst excretion was observed from 18 th to 24 th day after both parturitions. These findings may indicate the existence of a relationship between the periparturient phase and Eimeria oocyst output and suggest an important role of the mothers in transmission of the infection to their litters.

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“…In the 181-365 days old age group, in both treatments, it was not possible to estimate the frequency of Eimeria spp., owing to low OoPG. Eimeria bovis was the most frequent in both groups, a species that, together with E. zuernii, has a large distribution in Brazil (ALMEIDA et al, 2011;BRUHN et al, 2011BRUHN et al, , 2012b. Very young cattle (0 to 90 days old) in general become infected with E. bovis and E. zuernii (DAUGSHIES & NAJDROWSKI, 2005), confirming the findings of the current study.…”

Section: Resultssupporting

confidence: 88%

Economic evaluation and efficacy of strategic-selective treatment of gastrointestinal parasites in dairy calves

Blanco

Barbieri

Lima

et al. 2017

Rev. Bras. Parasitol. Vet.

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In the Experimental Farm of the Universidade Federal de Lavras (EF-UFLA), state of Minas Gerais, Brazil, on their day of birth, female Holstein calves were randomly selected and placed into two groups containing fifteen animals each: Strategic-Selective Treatment (S-ST) or Conventional Treatment (CT). In the S-ST, calves were treated after coproparasitological examinations according to criteria established previously by the researchers. Calves in the CT were treated according to the opinion of the veterinarian of EF-UFLA. For statistical analysis, the frequency (%) of fecal samples with count of eggs per gram of feces (EPG) ≥300, count of oocysts per gram of feces (OoPG) ≥500 and fecal samples with count of cysts of Giardia spp. ≥1 were conducted. The overall average frequency of fecal samples with EPG ≥300, OoPG ≥500 and Giardia spp. cysts ≥1, respectively, was similar (p >0.05) between S-ST (20.3%; 17.3%; and 31.5%) and CT (26.4%; 23.9%; and 37.3%). The effective operational cost, per animal, in 12 months, was of R$ 784.58 (US$ 241.41) and R$ 83.90 (US$ 25.81) in S-ST and CT, respectively. The S-ST requires adjustments to be used as a technically efficient and economically viable alternative for the control of gastrointestinal parasitosis in female Holstein calves.Keywords: Bovine, gastrointestinal nematodes, Eimeria, Giardia, costs. ResumoNa Fazenda Experimental da Universidade Federal de Lavras (FE-UFLA), Minas Gerais, Brasil, no dia do nascimento, bezerras da raça holandesa foram sorteadas de forma aleatória para compor um dos dois grupos, formados por 15 animais cada: Tratamento Estratégico-Seletivo (TE-S) ou Tratamento Convencional (TC). No TE-S, as bezerras foram tratadas após exames coproparasitológicos de acordo com critérios previamente estabelecidos pelos pesquisadores. No TC, as bezerras foram tratadas conforme orientação do veterinário da FE-UFLA. Em ambos grupos, as bezerras foram monitoradas a cada 14 dias, do nascimento até os 12 meses de idade, por meio de exames coproparasitológicos. Para análise estatística, considerou-se a frequência (%) de amostras fecais com contagem de ovos por grama de fezes (OPG) ≥300, contagem de oocistos por grama de fezes (OoPG) ≥500, e amostras fecais com contagem de cistos de Giardia spp. ≥1. A frequência média global de amostras fecais com contagem de OPG ≥300, OoPG ≥500 e cistos de Giardia spp. ≥1, respectivamente, foi similar (p >0,05) entre TE-S (20,3%; 17,3%; e 31,5%) e TC (26,4%; 23,9%; e 37,3%). O custo operacional efetivo, por animal, em 12 meses, foi R$ 784,58 (US$ 241.40) e R$ 83,90 (US$ 25.81) para TE-S e TC, respectivamente. O TE-S necessita de ajustes para que possa ser indicado como uma alternativa, tecnicamente eficiente e economicamente viável, no controle das parasitoses gastrointestinais em bezerras leiteiras.

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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

Cited by 26 publications

References 16 publications

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

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

Oocyst excretion pattern of three intestinal Eimeria species in female rabbits

Economic evaluation and efficacy of strategic-selective treatment of gastrointestinal parasites in dairy calves

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