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Impacts & Issues


Description of the economicals and cows’ health impacts of Cryptosporidiosis in the 2 seas area

What are the main issues ?

Cow Health Concerns

The Cryptosporidiosis is a major health issue for the reared animals. Indeed, it causes diarrheas for the calves during 4 to 15 days. This disease can induce mortality in 5 to 10% cases, or rarely in 30 % cases if Cryptosporidiosis is associated with other pathogensIn countries from the 2seas area, Cryptosporidium prevalence is high and ranges from 45% to 74% (Fig 1)

Human Health Concerns

The Cryptosporidiosis is present both in developed and developing countries but the prevalence is stronger in developing countries because of the lack of hygiene and of the large number of immunodeficient people. Cryptosporidiosis is estimated to cause more than 200 000 deaths per year (ref). Cryptosporidium can be considered as a potential bioterrorist agent, thus, it is important to improve the detection tools and instruments in the future.  

Economic Issue

Cryptosporidiosis can have a strong economical impact: in 1993 in Milwaukee (USA), 403 000 contaminated people led to an estimated cost of  100 millions $. For the dairy cows farms, this parasite economic impact is due to the loss of productivitycost of treatment, cost of the in situ detection tools, additional labor costs, cost of dead calves, growth rate impairment…  No precise value on economic impact in dairy cows farms are available. One of the purpose of the H4DC project is to define exactly the loss of money caused by Cryptosporidiosis.  



  • Bartels, et al., Prev Vet Med 2010; Meganck et al., Prev Vet Med 2015 
  • Jérôme Follet, Karine GuyotHélène Leruste, Anne Follet-DumoulinOurida Hammouma-Ghelboun, et al.. Cryptosporidium infection in a veal calf cohort in France: molecular characterization of species in a longitudinal study.. Veterinary Research, BioMed Central, 2011, 42 (1), pp.116. ff10.1186/1297- 9716-42-116ff. ffinserm-00660464f 
  • Thomas Geurden, Dirk Berkvens, Peter Geldhof, Jozef Vercuysse, Edwin Claerebout, A Bayesian approach for the evaluation of six diagnostic assays and the estimation of Cryptosporidium prevalence in dairy calves (2006), INRA, EDP Sciences, Vet. Res. 37,  671–682 671, doi: 10.1051/vetres:2006029 
  • Beth Wells al., Prevalence, Species identification and genotyping Cryptosporidium from livestock and deer in a catchment in  the Cairngorms with a history of a contaminated public water supply (2015)Parasites & Vectors ,8:66, doi: 10.1186/s13071-015-0684-x