ArticleVeterinary parasitology2014
Molecular characterization of Cryptosporidium isolates from beef calves under one month of age over three successive years in one herd in western France.
Article in Veterinary parasitology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 32 citations in OpenAlex.
- Article
- Characterization of NFDQ1 in Cryptosporidium parvum.Parasites & vectors · 2024Article
- Molecular Detection and Distribution ofTransboundary and emerging diseases · 2023Article
- First Molecular Genotyping ofArchives of Razi Institute · 2022Article
- Cross-Border Investigations on the Prevalence and Transmission Dynamics ofMicroorganisms · 2021Article
- The Age-RelatedAnimals : an open access journal from MDPI · 2021Article
- Comparative genomic analysis of three intestinal species reveals reductions in secreted pathogenesis determinants in bovine-specific and non-pathogenicMicrobial genomics · 2020Article
- Molecular characterization of Cryptosporidium isolates from diarrheal dairy calves in France.Veterinary parasitology, regional studies and reports · 2019Article
- Prevalence and molecular characterization of Cryptosporidium and Giardia in pre-weaned native calves in the Republic of Korea.Parasitology research · 2019Article
- Common occurrence of Cryptosporidium hominis in asymptomatic and symptomatic calves in France.PLoS neglected tropical diseases · 2018Article
- Molecular Epidemiology of Cryptosporidiosis in China.Frontiers in microbiology · 2017Review
- Prevalence and molecular characterization of Cryptosporidium spp. in dairy cattle, northwest China.Parasitology research · 2015Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Cohorts of pre-weaned calves were studied for Cryptosporidium infection over three successive years (2010-2012) in one beef cattle herd in western France. Each year 25-34 calves were sampled weekly from 3 days to one month of age in order to characterize oocyst output, Cryptosporidium species and clinical features associated with infection. Faecal samples were screened for the presence of oocysts using immunofluorescence analysis. DNA was extracted from positive samples and a PCR SSU rRNA followed by RFLP or sequencing was performed. For the subtyping of C. parvum, a gp60 PCR was carried out. Regardless of the year, 92-100% of the animals excreted oocysts on at least one sampling date. Depending on the year of observation, the age of highest prevalence varied. In contrast, the peak of excretion was systematically observed almost at the same age (2nd-3rd week of life) with excretion levels ranging from between 100 and 1.7 × 10(7)oocysts/g of faeces. Differences concerning clinical signs depending on the year of sampling were observed. Different species patterns were observed, with a predominance of C. bovis in the 1st year and a predominance of C. parvum in the last year. Moreover, two zoonotic subtypes of C. parvum, IIaA15G2R1 and IIaA18G2R1, were recorded in different years. This study shows that, in a given farm, the Cryptosporidium species and C. parvum subtypes identified as well as the prevalence of infection and level of excretion may vary greatly and show distinct patterns according to the year.
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