Herd factors influencing oocyst production of Eimeria and Cryptosporidium in Estonian dairy cattle

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

doi:10.1007/s00436-009-1540-8

Cited by 15 publications

(13 citation statements)

References 21 publications

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“…Michel et al (1972), in England, reported that oocyst production in naturally infected cows increased during the peripartum period, with greater contamination of pasture during this period. Lassen et al (2009b) also found that calves that were reared separately from adult animals presented lower oocyst shedding. This occurs because adult animals act as reservoirs for the agent and sources of infection for young animals, given that although immunity to Eimeria is species-specific, it is not absolute (JOLLEY; BARDSLEY, 2006;LIMA, 2004).…”

Section: Resultsmentioning

confidence: 82%

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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: 82%

“…Furthermore, Lassen et al (2009b) found that cows shed greater quantities of oocysts under conditions of high humidity, and Rehman et al (2010) found that in the rainy months, the prevalence of eimeriosis increased. In the present study, a lower OPG count was found in July (p < 0.05), which is the start of the dry period of the year.…”

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

“…2). Lassen et al (2009a) and Klockiewicz et al (2007) describe a relationship between the rate of oocyst excretion and herd size, with larger herd sizes being associated with a higher rate of oocyst excretion. This might explain the fact that higher but less frequent oocyst excretion was observed in this study in the fattening facilities which reared significantly more calves than the dairy cattle facilities.…”

Section: Discussionmentioning

confidence: 98%

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 E. bovis and E. 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 for Eimeria spp., along with the separate OPG values for Eimeria (E.) bovis and E. zuernii. A questionnaire was completed for each farm to record information about herd size and management together with individual animal data. Eimeria oocysts, regardless of the kind of Eimeria spp., were detected in 62 of these farms, which gives 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 average oocyst excretion level was 2,950 OPG in terms of total Eimeria spp. oocyst excretion, 700 OPG for E. bovis and 1,500 OPG 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 which influences the infection pressure, on the age of the calves and the time after rehousing. In general, higher oocyst excretion rates were found in calves kept on litter compared to rearing on slatted floor. Younger calves and calves sampled early after housing shed higher amounts of oocysts than older calves and calves stabled a longer period before sampling, respectively. Furthermore, there was a positive correlation between OPG and the observation of diarrhoea, defined as observation of a loose to liquid faecal consistency. Excretion of E. zuernii oocysts was more closely linked to the occurrence of diarrhoea than E. bovis oocyst excretion. This study confirms that the pathogenic coccidia E. bovis and E. zuernii are ubiquitous in German cattle populations and a significant cause of diarrhoeal disease in calf rearing.

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“…This can be attributed to more frequent excretion of smaller quantities of oocysts in dairy cattle facilities, whereas higher levels of oocysts were excreted less frequently in fattening facilities (for median values, see Table 2). Lassen et al (2009a) and Klockiewicz et al (2007) describe a relationship between the rate of oocyst excretion and herd size, with larger herd sizes being associated with a higher rate of oocyst excretion. This might explain the fact that higher but less frequent oocyst excretion was observed in this study in the fattening facilities which reared significantly more calves than the dairy cattle facilities.…”

Section: Discussionmentioning

confidence: 98%

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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Herd factors influencing oocyst production of Eimeria and Cryptosporidium in Estonian dairy cattle

Cited by 15 publications

References 21 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

Prevalence of Eimeria bovis and Eimeria zuernii in German Cattle Herds and Factors Influencing Oocyst Excretion

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

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