in this study parasitic infection of bobwhite and japanese quails were clarified in farms of garmsar city in province of semnan. forty quails from two breeds randomly were selected and they examined to identify all internal and external parasites .finding was shown that five percent of the quails examined harbored one or more species of helminthes. two cestodes, raillietina echinobothrida and r...

Humans are altering biodiversity globally and infectious diseases are on the rise; thus, there is interest in understanding how changes to biodiversity affect disease. Here, we explore how predator diversity shapes parasite transmission. In a mesocosm experiment that manipulated predator (larval dragonflies and damselflies) density and diversity, non-intraguild (non-IG) predators that only cons...

BACKGROUND Schistosomiasis is a chronic, debilitating parasitic disease infecting more than 200 million people and is second only to malaria in terms of public health importance. Due to the lack of a vaccine, patient therapy is heavily reliant on chemotherapy with praziquantel as the World Health Organization-recommended drug, but concerns over drug resistance encourage the search for new drug ...

Coevolutionary host–parasite “arms races” can be disrupted by new evolutionary forces imposed biological invasions, affecting both host and parasite densities, as well their traits. The spread of cane toads (Rhinella marina) parasitic lungworm (Rhabdias pseudosphaerocephala) across tropical Australia provides an ideal opportunity to study a perturbed system. We conducted cross-infection experim...

Humans are exposed to mixtures of polyhalogenated aromatic hydrocarbons, and the potential health effects of these exposures are uncertain. A subset of this class of compounds produce similar spectra of toxicity in experimental animals as does 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), and these chemicals have been classified as "dioxins." In this study, we compared the body burdens of dioxins...