Prevalence, intensity, and fertility of ovine cystic echinococcosis in the central Peruvian Andes

Erica L. Dueger, Robert H. Gilman

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


An abattoir survey of 212 sheep of different ages was undertaken to determine the local epidemiological transmission patterns of Echinococcus granulosus in the central Peruvian Andes. Overall prevalence of the disease in sheep in this survey (which ended in July 1996) was 77·4%, with 96% of sheep aged ≥6 years being infected. Of 1165 cysts examined, 41·1% were fertile with a mean protoscolex viability of 73·2%. A logistic regression model for the distribution of cyst fertility and type by age, location and size is described. Mathematical modelling also determined that infection pressure on sheep was 0·44 infections per year and that the mean number of cysts increased linearly by 1·28 cysts per year. These data suggest that E. granulosus is in an endemic state in this area and control measures could drive the disease towards extinction.

Original languageEnglish (US)
Pages (from-to)379-383
Number of pages5
JournalTransactions of the Royal Society of Tropical Medicine and Hygiene
Issue number4
StatePublished - 2001


  • Cyst viability
  • Echinococcosis
  • Echinococcus granulosus
  • Infection intensity
  • Mathematical modelling
  • Peru
  • Prevalence
  • Sheep

ASJC Scopus subject areas

  • Parasitology
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases


Dive into the research topics of 'Prevalence, intensity, and fertility of ovine cystic echinococcosis in the central Peruvian Andes'. Together they form a unique fingerprint.

Cite this