The prevalence of rotavirus in neonatal calf diarrhoea, using electron microscopic examination

Nourmohammadzadeh, F.; Davoudi, Y.; Abdollahpour, Gholamreza; Nouri, Ali

doi:10.1007/s00580-011-1270-z

Cited by 11 publications

(13 citation statements)

References 5 publications

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“…Thus, it would be relevant to perform more longitudinal studies in which fecal samples are taken in predetermined moments, as well as whenever the calves manifest diarrhea, in order to evaluate a larger number of animals to confirm these findings and if they are related to the virulence of genotypes of RVA. Nourmohammadzadeh et al (2012) reported that the higher prevalence of rotavirus infection occurs in calves aged between 2 and 4 weeks, and lower in animals in the first week of life, which agrees with the results of the present report, in which none of the positive calves were in their first week of life, four calves were in the second week of life, four calves were in the third week of life and one calf was in the fourth week of life. Bartels et al (2010), evaluating the prevalence and risk factors for the presence of enteropathogens in normal and diarrheic feces of 424 calves aged between 1 and 3 weeks of life reported that the prevalence of normal consistency feces was 57.1%, semiliquid feces was 23.8%, and liquid feces was 19.1%.…”

Section: Discussionsupporting

confidence: 93%

Longitudinal study of bovine rotavirus group A in newborn calves from vaccinated and unvaccinated dairy herds

Rocha

Silva

Gregori

et al. 2017

Trop Anim Health Prod

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Reports of rotavirus excretion in calves usually result from cross-sectional studies, and in face of the conflicting results regarding protection of calves born to vaccinated dams against diarrhea, the aim of the present study was to evaluate rotavirus excretion in dairy calves born to vaccinated or unvaccinated dams, to identify the genotypes of bovine rotavirus group A (RVA) strains isolated from these animals as well as to investigate characteristics of the disease in naturally occurring circumstances throughout the first month of life. Five hundred fifty-two fecal samples were taken from 56 calves, 28 from each farm and, in the vaccinated herd, 11/281 samples (3.91%) taken from six different calves tested positive for RVA while in the unvaccinated herd, 3/271 samples (1.11%) taken from 3 different calves tested positive. The genotyping of the VP7 genes showed 91.2% nucleotide sequence identity to G6 genotype (NCDV strain), and for the VP4 gene, strains from the vaccinated herd were 96.6% related to B223 strain, while strains from the unvaccinated herd were 88% related to P[5] genotype (UK strain). Genotypes found in this study were G6P[11] in the vaccinated herd and G6P[5] in the unvaccinated herd. All calves infected with rotavirus presented an episode of diarrhea in the first month of life, and the discrepancy between the genotypes found in the commercial vaccine (G6P[1] and G10P[11]) and the rotavirus strains circulating in both vaccinated and unvaccinated herds show the importance of keeping constant surveillance in order to avoid potential causes of vaccination failure.

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Section: Discussionsupporting

confidence: 93%

Longitudinal study of bovine rotavirus group A in newborn calves from vaccinated and unvaccinated dairy herds

Rocha

Silva

Gregori

et al. 2017

Trop Anim Health Prod

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“…Whereas, in our study the percentage of the females affected by rotavirus is superior to males. The comparable result is recorded by Hosso and Pandey [27] , who revealed that among 23 calves positive for rotavirus, nine were males and 14 females.…”

Section: Discussionsupporting

confidence: 88%

“…While Zrelli et al [21] recorded an average rate of 22.8%, Langoni et al [22] showed an average rate of 25.1% and AKam et al [4] cited a percentage of 21.84%. Interestingly, others reported an important rate of GARV infection such as Reynolds et al [13] (42%), Snodgrass et al [14] (50%), De La Fuente et al [16] (42.7%), Izzo et al [12] (79.9%) and Nourmohammadzadeh et al [23] (34%). Nevertheless, Perez et al [15] observed a prevalence of 7%.…”

Section: Discussionmentioning

confidence: 97%

“…The 2-and 4-week-old calves were the most susceptible to GARV and BCoV infections, which may be due to decreasing of passive immunity and the absence of the natural resistance against infection for both enteropathogens. The presence of BCoV infection in older calves (22)(23)(24)(25)(26)(27)(28)(29)(30) d) could be explained by the method of livestock farming of calves (using the grouping of the calves instead of individual stall). The 3-weeks-old calves are characterized by absence of GARV, this may be highlighted by an increased natural resistance against infection for this enteropathogen and small number of sample cooperated with 1 and 4 age-group, in spite of the absence of significant difference among the various age-groups.…”

Section: Discussionmentioning

confidence: 99%

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Prevalence of rotavirus (GARV) and coronavirus (BCoV) associated with neonatal diarrhea in calves in western Algeria

Selles

Kouidri

Tahar

et al. 2014

Asian Pacific Journal of Tropical Biomedicine

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“…), although, exceptionally, the highest prevalence of rotavirus is seen at 2–4 weeks of age (Nourmohammadzadeh et al . ). Bacteremia in neonatal calves increases the risk for severe diarrhea and death (Fecteau et al .…”

Section: Causes Of Newborn Calf Mortalitymentioning

confidence: 97%

Newborn calf welfare: A review focusing on mortality rates

Uetake

2012

Animal Science Journal

115

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Calf mortality control is vitally important for farmers, not only to improve animal welfare, but also to increase productivity. High calf mortality rates can be related to larger numbers of calves in a herd, employee performance, severe weather, and the neonatal period covering the first 4 weeks of life. Although the basic premise of preventing newborn calf mortality is early detection and treatment of calves at risk for failure of passive transfer of immunoglobulins, calf mortality due to infectious diseases such as acute diarrhea increases in the presence of these physical and psychological stressors. This suggests that farmers should not ignore the effects of secondary environmental factors. For prevention rather than cure, the quality of the environment should be improved, which will improve not only animal welfare but also productivity. This paper presents a review of the literature on newborn calf mortality and discusses its productivity implications.

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The prevalence of rotavirus in neonatal calf diarrhoea, using electron microscopic examination

Cited by 11 publications

References 5 publications

Longitudinal study of bovine rotavirus group A in newborn calves from vaccinated and unvaccinated dairy herds

Longitudinal study of bovine rotavirus group A in newborn calves from vaccinated and unvaccinated dairy herds

Prevalence of rotavirus (GARV) and coronavirus (BCoV) associated with neonatal diarrhea in calves in western Algeria

Newborn calf welfare: A review focusing on mortality rates

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