Genetic variability within and among Haemonchus contortus isolates from goats and sheep in China.

ABSTRACT:

Background

Haemonchus contortus (order Strongylida) is a common parasitic nematode infecting small ruminants and causing significant economic losses worldwide. Knowledge of genetic variation within and among H. contortus populations can provide a foundation for understanding transmission patterns, the spread of drug resistance alleles and might assist in the control of haemonchosis.

Methods

152 H. contortus individual adult worms were collected from seven different geographical regions in China. The second internal transcribed spacer (ITS-2) of the nuclear ribosomal DNA and mitochondrial nicotinamide dehydrogenase subunit 4 gene (nad4) were amplified by polymerase chain reaction (PCR) and sequenced directly. The sequence variations and population genetic diversities were det

SUBMITTER: Yin F 

PROVIDER: S-EPMC3852563 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature