Fecundity of Cryptosporidium parvum is correlated with intracellular levels of the viral symbiont CPV

M. C. Jenkins, J. Higgins, Juan E Abrahante - Llorens, K. E. Kniel, C. O'Brien, J. Trout, C. A. Lancto, M. S. Abrahamsen, R. Fayer

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17 Scopus citations

Abstract

Differences in the virulence and fecundity of Cryptosporidium parvum isolates have been observed by several researchers studying cryptosporidiosis. The purpose of the present study was to determine if there was a correlation between intracellular levels of the viral symbiont CPV in C. parvum and fecundity of two isolates of the parasite, namely C. parvum Beltsville (B) and C. parvum Iowa (I). Dairy calves infected with 106 C. parvum-B excreted 5-fold more oocysts compared with calves infected with the same number of C. parvum-I oocysts. The increased fecundity of the former strain was corroborated by semi-quantitative PCR assay of DNA isolated from cell cultures infected with either C. parvum-B or C. parvum-I. Quantitative reverse transcriptase-PCR analysis of viral RNA revealed a 3-fold greater number of CPV in C. parvum-B compared with C. parvum-I oocysts. These findings may indicate a role for CPV in fecundity and possibly virulence of C. parvum.

Original languageEnglish (US)
Pages (from-to)1051-1055
Number of pages5
JournalInternational Journal for Parasitology
Volume38
Issue number8-9
DOIs
StatePublished - Jul 1 2008

Keywords

  • Cryptosporidium parvum
  • Fecundity
  • Oocysts
  • Viral symbiont
  • Virus

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