PMID: 9171842Apr 1, 1997Paper

Infectivity of Cryptosporidium parvum oocysts is retained upon intestinal passage through a migratory water-fowl species (Canada goose, Branta canadensis)

Tropical Medicine & International Health : TM & IH
Thaddeus K GraczykH J Goodale

Abstract

Five Cryptosporidium-free Canada geese (Branta canadensis) were individually orally dosed with 3.5 x 10(6) Cryptosporidium parvum oocysts infectious to neonatal BALB/c mice. After intestinal passage, inoculum-derived oocysts extracted from goose faeces established severe infection in 14 neonatal BALB/c mice (inoculum dose 2.5 x 10(5)/mouse). The inoculum-derived oocysts were detected in goose faeces up to 9 days post-inoculation (PI); the number of intact oocysts and oocyst shells shed during the first 3 days PI was significantly higher than for the remaining 6 days PI (P < 0.01). Based on acid-fast stained air-dried direct wet smears, 62% of the oocysts in goose faeces were intact (oocyst shells) constituted 38%) and conformed to morphological features of viable and infectious inoculum oocysts. The fluorescence scores of the inoculated oocysts, obtained by use of the MERIFLUOR test, were identical to those obtained for the faeces-recovered oocysts (majority 3+ to 4+). The dynamics of oocyst shedding showed that overall, the birds released a significantly higher number of intact oocysts than oocyst (P < 0.01). Retention of the viability and infectivity of C. parvum oocysts following intestinal passage through a migratory water-...Continue Reading

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Citations

Jan 5, 2002·Applied and Environmental Microbiology·Ryan C KuhnKevin H Oshima
Aug 4, 2006·The Journal of Parasitology·Marcelo Vasconcelos MeirelesSolange Maria Gennari
Oct 10, 2006·Applied and Environmental Microbiology·Josephine NgUna Ryan
Aug 22, 2007·Journal of Toxicology and Environmental Health. Part a·Jennifer D RobertsThaddeus Graczyk
Jul 9, 2004·Applied and Environmental Microbiology·Ling ZhouLihua Xiao
Dec 1, 2017·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Maria Paula de Carvalho EwaldJoão Luis Garcia
Feb 11, 2000·Veterinary Parasitology·T Sréter, I Varga
Dec 13, 2000·International Journal for Parasitology·R FayerS J Upton

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