Cross-sectional study of the G and P genotypes of rotavirus A field strains circulating in regularly vaccinated dairy cattle herds

Fritzen, Juliana Torres Tomazi; Lorenzetti, Elis; Oliveira, Marcos Vinicius; Bon, Vinícius Rodrigues; Ayres, H.; Alfieri, Amauri Alcindo

doi:10.1007/s11250-018-1769-2

Cited by 10 publications

(9 citation statements)

References 46 publications

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“…The strongest identity between our eld BRVA strains and previously isolated Egyptian strains may be due to VP4 and VP7 genes of BRVA shared in nucleotide sequence. The genetically distant between eld and vaccinal strain of BRV suggesting possible emergence of new genotypes which may possibly be due to genetic reassortment because of segmented nature dsRNA genome of Rotavirus (Hassan, 2014 andFritzen et al, 2019). Some studies had shown that vaccination with the genotype G6P1 of BRVA results in poor heterologous protection against BRVA G6 strains containing different P genotypes from the vaccine.…”

Section: Molecular Comparison Between Detected and Typed Rotaviruses'...mentioning

confidence: 99%

“…Vaccination of cows and buffalo at the end of pregnancy is one of the main health management strategies for control and prophylaxis of BRV infection. An increase in anti-Rotavirus antibody titer and adequate colostrum intake promote improvement in passive immunity that protects calves from Rotavirus infection in the rst weeks of life (Fritzen et al, 2019). According to (Youssef, 2017 andZaitoun et al, 2018), Rotavirus antigen was serologically detected in fecal samples of enteric cases of examined calves coming from vaccinated dams that were vaccinated by a commercially prepared inactivated Rotavac vaccine containing Rotavirus serotype G6P5, Coronavirus and Enterotoxigenic Escherichia coli E-coli strain F5 (K99).…”

Section: Introductionmentioning

confidence: 99%

“…Immunity to Rotavirus infection is homotypic, i.e. genotype speci c. Considering emergence of strains with variant G and P genotypes in a vaccinated herd, it is possible to con rm that there is homologous protection (Fritzen et al, 2019). Still, no information is available regarding the sequence data of circulating BRV amongst livestock population of Assiut Governorate.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Variation between RT-PCR Detected Rotavirus Infection of Naturally Diarrheic Neonatal Calves and Rotavirus Strains of Commercial Vaccines

2022

JGEBR

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Neonatal diarrhea is the main cause of morbidity and mortality in calves, and Rotavirus is the main viral etiology. Rotavirus vaccines are one of the main important methods for control of diarrhea in neonates’ calves. In the current study, Deoxyribonucleic acid (DNA) sequencing and phylogenetic analysis of Bovine Rotavirus Group a (BRVA) were performed in our study. 1 Calf guard® vaccine genotype (G6P1) and 5 different field genotypes (2 G6P5, 1 G10P5, G10P? and 1 G10P11) were subjected to DNA sequencing. We observed that at the nucleotide level, G10P5 and G10P? Sequences were 100 % identical with each other, two G6P5 sequences were 100% identical with each other and there was no significant similarity between sequences of G10P11 with sequences of G6P5, G10P5, and G10P? The phylogenetic analysis of G10P5 and G10P? Isolates showed a close cluster with G10 isolates of Sharkia governorate, Egypt, phylogenetic analysis of two G6P5 and one G10P11 isolate showed a close cluster with the VP4 gene of Rotavirus isolates of Dakahlia Governorate, Egypt. Molecular comparison between detected and typed Rotaviruses’ genotypes with other genotypes of common vaccines indicated that there were genetically close or distance between field and vaccine Rotavirus strains. Our results can be concluded as the following, Molecular comparison between detected and typed Rotaviruses’ genotypes with other genotypes of common vaccines indicated that there was genetically close or distance between field and vaccinal Rotavirus strains. Also, we suggest that Rotavac vaccine containing G6P5 Rotavirus strain and Scour guard vaccine containing can be used in Assiut governorate due to circulating of G6P5 and G10P11 strains of Rotavirus in Assiut.

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Section: Molecular Comparison Between Detected and Typed Rotaviruses'...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular Variation between RT-PCR Detected Rotavirus Infection of Naturally Diarrheic Neonatal Calves and Rotavirus Strains of Commercial Vaccines

2022

JGEBR

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“…Enterotoxigenic Escherichia coli (ETEC) affects calves primarily during the first week of life, whereas rotavirus, coronavirus and Cryptosporidium spp. are common causes of diarrhea during the first two to three weeks of calves’ life [ 7 , 9 – 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Implementing pre-calving vaccination (PV) and taking advantage of the enhanced lactogenic immunity could be a useful tool for reducing morbidity and mortality due to diarrhea. Previous studies have demonstrated that PV is efficient in decreasing the incidence, severity and duration of diarrhea and pathogen shedding in calves [ 12 , 29 – 32 ]. Regarding the effect on calf mortality, early studies on this subject showed varying results [ 28 , 29 , 33 , 34 ], and studies conducted within this century have not reached a consensus either [ 21 , 31 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Implementation of a pre-calving vaccination programme against rotavirus, coronavirus and enterotoxigenic Escherichia coli (F5) and association with dairy calf survival

Viidu

Mõtus

2022

BMC Vet Res

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Background Diarrhea is one of the most common diseases and causes of death in calves during the first month of life. Pre-calving vaccination programme (PVP) against the most common diarrhea-causing pathogens could help to avoid this threat if hyperimmune transition milk (TM) is fed to calves throughout the whole susceptibility period. The aim of this retrospective cohort study was to reveal the implementation practices of PVPs in large commercial dairy farms and to compare calf-level mortality hazards during the first year of vaccination (V+ period) and a year before implementing the vaccination programme (V- period). A questionnaire was filled out in 15 large-scale dairy farms in Estonia that used PVP. The farms were assigned into three groups based on compliance with the vaccine directions for use and TM feeding practices. Calf-level time-to-event data was analyzed with an observation period of 21 days and on-farm mortality due to diarrhea being the event of interest. Results During the V+ period, a significant decline in diarrhea-induced calf mortality was identified in three out of six herds that followed vaccination instructions and fed TM for at least 14 days. On average, calf mortality hazard due to diarrhea decreased among these herds (hazard rate ratio (HR) = 0.72, 95% confidence interval (CI) 0.63; 0.81). In the group of correctly vaccinating herds where TM was fed for less than 14 days, diarrhea-induced calf mortality decreased in two herds and remained unchanged in two herds with average diarrhea-induced calf mortality hazard declining significantly during the vaccination period (HR = 0.24, 95% CI 0.14; 0.41). Among the three farms that deviated from the vaccination instructions, the average calf mortality hazard increased in the V+ period (HR = 1.61, 95% CI 1.21; 2.14). Conclusions This study revealed that implementing a PVP might aid to reduce diarrhea-induced calf mortality in large commercial dairy farms. There is a need to increase veterinarians´ and farmers´ awareness about the importance of including pregnant heifers into the vaccination programme and emphasize the importance of prolonged feeding of hyperimmune TM to calves.

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Identification of rotavirus A strains in small ruminants: first detection of G8P[1] genotypes in sheep in Turkey

Timurkan

Alkan

2019

Arch Virol

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Cross-sectional study of the G and P genotypes of rotavirus A field strains circulating in regularly vaccinated dairy cattle herds

Cited by 10 publications

References 46 publications

Molecular Variation between RT-PCR Detected Rotavirus Infection of Naturally Diarrheic Neonatal Calves and Rotavirus Strains of Commercial Vaccines

Molecular Variation between RT-PCR Detected Rotavirus Infection of Naturally Diarrheic Neonatal Calves and Rotavirus Strains of Commercial Vaccines

Implementation of a pre-calving vaccination programme against rotavirus, coronavirus and enterotoxigenic Escherichia coli (F5) and association with dairy calf survival

Identification of rotavirus A strains in small ruminants: first detection of G8P[1] genotypes in sheep in Turkey

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