Åberg, Malin and Emanuelson, Ulf and Troell, Karin and Björkman, Camilla
(2019).
Infection dynamics of Cryptosporidium bovis and Cryptosporidium ryanae in a Swedish dairy herd.
Veterinary parasitology. X. 1
, 1-6
[Journal article]
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Abstract
In order to investigate the infection dynamics of Cryptosporidium bovis and Cryptosporidium ryanae, a Swedish dairy farm known to be free of C. parvum was recruited for a one-year study. Fecal samples were collected every four weeks (a total of 13 occasions) from 20 randomly selected calves younger than 65 days. A total of 238 feces samples were collected directly from the rectum and then examined with immunofluorescence microscopy; those positive for Cryptosporidium spp. oocysts were further processed by molecular species determination. Oocysts were found in 92 samples, and in 72 of these the species was successfully determined: 87.5% C. bovis, 9.7% C. ryanae and 2.8% a mix of both species. No C. parvum was found. The prevalence of shedding calves was highest at ages 4 and 5 weeks; however, the feces with the highest oocyst per gram (OPG) were registered at 2–4 weeks of age. This is earlier than what has been found in most other studies, indicating that the infection dynamics of C. bovis/C. ryanae may be affected by the presence of C. parvum. The OPG for the positive calves ranged from 200 to 1.1 × 106 (geometric mean 6.88 × 103 ). The youngest calf in which C. bovis was identified was 5 days old, and the youngest calf in which C. ryanae was identified was 15 days old. Calves’ housing type and seasonality were not associated with differences in the shedding of oocysts. Furthermore, there was no association between the presence of diarrhea and oocyst shedding.
Authors/Creators: | Åberg, Malin and Emanuelson, Ulf and Troell, Karin and Björkman, Camilla | ||||
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Title: | Infection dynamics of Cryptosporidium bovis and Cryptosporidium ryanae in a Swedish dairy herd | ||||
Year of publishing : | 2019 | ||||
Volume: | 1 | ||||
Page range: | 1-6 | ||||
Number of Pages: | 6 | ||||
Publisher: | Elsevier | ||||
ISSN: | 2590-1389 | ||||
Language: | English | ||||
Publication Type: | Journal article | ||||
Refereed: | Yes | ||||
Article category: | Scientific peer reviewed | ||||
Version: | Published version | ||||
Copyright: | Creative Commons: Attribution 4.0 | ||||
Full Text Status: | Public | ||||
Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 403 Veterinary Science (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science | ||||
Keywords: | Cryptosporidiosis Cryptosporidium spp., Cattle, Pre-weaned calves, Diarrhea | ||||
URN:NBN: | urn:nbn:se:slu:epsilon-p-101867 | ||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-101867 | ||||
Additional ID: |
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ID Code: | 16366 | ||||
Faculty: | VH - Faculty of Veterinary Medicine and Animal Science | ||||
Department: | (VH) > Dept. of Clinical Sciences | ||||
Deposited By: | SLUpub Connector | ||||
Deposited On: | 29 Oct 2019 07:33 | ||||
Metadata Last Modified: | 29 Oct 2019 07:33 |
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