Gharamah, Abdullah Abobakr Mohammed
(2011)
Comparative Bionomics Of Haemonchus Contortus In Sheep And Goats Between Malaysia And Yemen And Its Respective Morphological And Molecular Characterization.
PhD thesis, Universiti Sains Malaysia.
Abstract
The bionomics of the parasitic nematode worm, Haemonchous contortus
were compared between Malaysia and Yemen. The morphological and molecular
characterizations of H. contortus isolates from the two countries were investigated.
Samples were obtained from sheep and goats. Study sites comprised of two States in
Malaysia (Perak and Kelantan) and two Governorates in Yemen (Sana'a and Al-
Hudaydah). The sites were chosen based on their geographical isolation within each
country. Records of total number of infected sheep and goats by H. contortus adult
worms during 2007-2009 in Malaysia and Yemen were collected from the annual
reports of veterinary service centers in each country. High prevalence rates of this
nematode in both sheep and goats were reported in Yemen. Data for temperature,
humidity and rainfall during those years were collected to show the climatic
conditions in the study areas and to assess a possible relation between these climatic
parameters and the percentages of infected animals. Abattoir investigations were also
carried out in Yemen during the period from September 2008 till February 2009. The
abomasa of 68 sheep and 33 goats were collected in Sana'a while 59 abomasa of
sheep and 105 abomasa of goats were collected in Al-Hudaydah. The data obtained
showed high monthly prevalences of this worm in sheep and goats with no
significant difference between host species in prevalences and total worm burdens
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