Variation and polymorphism in helminth parasites

Variation and polymorphism in helminth parasites.

There are strong biological, evolutionary and immunological arguments for predicting extensive polymorphism among helminth parasites, but relatively little data and few instances from which the selective forces acting on parasite diversity can be discerned. The paucity of information on intraspecific variation stands in contrast to the fine detail with which helminth species have been delineate...

Prevalence and biodiversity of helminth parasites in donkeys (Equusasinus) in Iran

There are over two million equine animals in Iran, of which approximately 75% are donkeys. Despite this, very little is known about their parasite status and the impact of this on their work output. Usually, it is the alimentary canal, body cavity and liver that harbor parasites in equine species. In this study, 45 donkeys (Equusasinus) were examined at necropsy. The contents of the stomach, sm...

Helminth parasites of laboratory mice and rats.

Rodents, as mice and rats are the most common laboratory animals used in research and testing. They are seldom investigated for autochthonous ecto- and endoparasites prior their utilization in the experiments. Helminth parasites can alter the interpretation of final results. Pinworms commonly infecting laboratory rodents include mainly the mice pinworms Syphacia obvelata and Aspiculuris tetrapt...

Susceptibility and immunity to helminth parasites

Parasitic helminth infection remains a global health problem, whilst the ability of worms to manipulate and dampen the host immune system is attracting interest in the fields of allergy and autoimmunity. Much progress has been made in the last two years in determining the cells and cytokines involved in induction of Type 2 immunity, which is generally protective against helminth infection. Inna...

Incidence of helminth parasites in shrew moles.