Evidence of Cryptosporidium transmission between cattle and humans in northern New South Wales

Experimental Parasitology
Josephine NgUna Ryan

Abstract

Cryptosporidium is an enteric parasite of public health significance that causes diarrhoeal illness through faecal oral contamination and via water. Zoonotic transmission is difficult to determine as most species of Cryptosporidium are morphologically identical and can only be differentiated by molecular means. Transmission dynamics of Cryptosporidium in rural populations were investigated through the collection of 196 faecal samples from diarrheic (scouring) calves on 20 farms and 63 faecal samples from humans on 14 of these farms. The overall prevalence of Cryptosporidium in cattle and humans by PCR and sequence analysis of the 18S rRNA was 73.5% (144/196) and 23.8% (15/63), respectively. Three species were identified in cattle; Cryptosporidium parvum, Cryptosporidium bovis and Cryptosporidium ryanae, and from humans, C. parvum and C. bovis. This is only the second report of C. bovis in humans. Subtype analysis at the gp60 locus identified C. parvum subtype IIaA18G3R1 as the most common subtype in calves. Of the seven human C. parvum isolates successfully subtyped, five were IIaA18G3R1, one was IIdA18G2 and one isolate had a mix of IIaA18G3R1 and IIdA19G2. These findings suggest that zoonotic transmission may have occurred bu...Continue Reading

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Citations

Oct 16, 2013·International Journal for Parasitology·Yaoyu FengLihua Xiao
Aug 22, 2012·Parasitology·Una Ryan, Michelle Power
Jan 24, 2016·Veterinary Parasitology·Marzieh Ezzaty MirhashemiTheo De Waal
Nov 19, 2013·Acta Tropica·Melissa Carvalho Machado do CoutoTeresa Cristina Bergamo do Bomfim
Jul 9, 2016·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Sabine Eva SchillerMichelle Power
Oct 4, 2016·Veterinary Parasitology·Nawal HijjawiUna Ryan
Sep 24, 2015·PLoS Neglected Tropical Diseases·Aparna LalMartyn Kirk
Jan 18, 2017·Parasite : Journal De La Société Française De Parasitologie·Chao GongGuang-Neng Peng
Feb 28, 2018·Parasitology Research·Catalina AvendañoJoaquín Quílez
Oct 24, 2017·Veterinary Sciences·Jackie BenschopJenny F Weston
Aug 2, 2016·Clinics and Practice·Caitlin TallantSubhasis Misra
Feb 8, 2020·The Veterinary Clinics of North America. Food Animal Practice·Monica Santin
Mar 14, 2021·Parasitology Research·Yaqiong GuoLihua Xiao
Sep 4, 2021·Veterinary Parasitology : Regional Studies and Reports·Daniel Yasur-LandauMonica Leszkowicz Mazuz

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