ArticleVeterinary parasitology2013
Cryptosporidium parvum: determination of ID₅₀ and the dose-response relationship in experimentally challenged dairy calves.
Article in Veterinary parasitology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
38 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Efficacy of halofuginone products to prevent or treat cryptosporidiosis in bovine calves: a systematic review and meta-analyses.Parasitology · 2021Pooled it
- Cryptosporidium parvum and bovine coronavirus in naturally and experimentally exposed calves: clinical outcome and pathogen shedding.Veterinary research · 2026Article
- Mechanisms of impaired glucose transport in cryptosporidiosis in goat kids.BMC veterinary research · 2026Article
- Management-associated herd-level risk factors for cryptosporidiosis in dairy calves in Finland.Frontiers in parasitology · 2026Article
- Mouse Models for Use in Cryptosporidium Infection Studies, Quantification of Parasite Burden Using Flow Cytometry, qPCR and Histopathology, and Confocal Imaging of Oocysts.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Article
- Coprological and molecular prevalence of Cryptosporidium and Giardia in cattle and irrigation water from Beni-Suef Governorate, Egypt.Scientific reports · 2025Article
- Anti-Cryptosporidium efficacy of BKI-1708, an inhibitor of Cryptosporidium calcium-dependent protein kinase 1.PLoS neglected tropical diseases · 2025Article
- Molecular Epidemiology of Cryptosporidiosis on Lamb and Goat Kid Farms in Gran Canaria, Canary Islands (Spain).Microorganisms · 2025Article
- P23-Specific IgY Significantly Reduces Diarrhea and Oocyst Shedding in Calves Experimentally Infected withVaccines · 2025Article
- Review
- Apical-out bovine intestinal organoids as an infection model forCurrent research in parasitology & vector-borne diseases · 2025Article
- Prevalence ofInternational journal of veterinary science and medicine · 2025Article
- Cryptosporidium PI(4)K inhibitor EDI048 is a gut-restricted parasiticidal agent to treat paediatric enteric cryptosporidiosis.Nature microbiology · 2024Article
- Prevalence and molecular characterization of Cryptosporidium spp. in pre-weaned diarrheic dairy calves and their bedding materials in northern China.Parasitology research · 2024Article
- Development of the Intestinal Microbiota of Dairy Calves and Changes Associated withMicroorganisms · 2024Article
- Human dendritic cell interactions with the zoonotic parasiteFrontiers in immunology · 2024Article
- Genetic characterisation ofCurrent research in parasitology & vector-borne diseases · 2024Article
- Identification of the glycopeptide epitope recognized by a protectiveInfection and immunity · 2023Article
- Differences in virulence and oocyst shedding profiles in lambs experimentally infected with different isolates ofCurrent research in parasitology & vector-borne diseases · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The objectives were to determine the median infective dose (ID₅₀) of Cryptosporidium parvum and to describe the dose-response relationship including associated clinical illness in experimentally challenged dairy calves. Within the first 24h of life, 27 test calves were experimentally challenged with C. parvum oocysts and 3 control calves were sham dosed. Test calves received 1 of 8 possible doses (25, 50, 100, 500, 1 × 10(3), 1 × 10(4), 1 × 10(5), and 1 × 10(6) oocysts). All 27 test calves developed diarrhea. Fecal oocyst shedding occurred in 25 (92.6%) test calves and in 0 control calves. The 2 non-shedding test calves both received 25 oocysts. There was an inverse relationship between dose and time to onset of fecal oocyst shedding (P=0.005). There was no relationship found between dose and duration (P=0.2) or cessation (P=0.3) of fecal oocyst shedding. In addition, there was not a significant relationship between log-dose and the log-peak oocysts (P=0.2) or log-total oocysts (P=0.5) counted/g of feces across the dose groups. There was a positive dose-response relationship between log-dose and diarrhea (P=0.01). However, when controlling for other factors, such as onset and cessation of fecal oocyst shedding, dose was not a significant predictor of diarrhea (P=0.5). Onset and cessation of fecal oocyst shedding were found to be the best predictors of diarrhea (P=0.0006 and P=0.04, respectively). The ID₅₀ for fecal oocyst shedding was 5.8 oocysts, for diarrhea was 9.7 oocysts, and for fecal oocyst shedding with diarrhea was 16.6 oocysts. Given that the ID₅₀ of C. parvum is far less than would be excreted into the environment by a naturally infected calf, prevention and control of cryptosporidiosis is a formidable challenge.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.