External parasites, such as fleas and ticks, live on the body of the host and produce an infestation.
Giardiasis, caused by the protozoan Giardia intestinalis, is the leading cause of intestinal parasitic infections in humans and pets, in particular dogs. Some of the main symptoms are diarrhea, ...
The pathogens Giardia duodenalis and Cryptosporidium are common causes of sometimes-fatal intestinal diseases in humans, other mammals and birds worldwide. Now, findings from researchers at Texas A&M ...