Cryptosporidium: Cryptosporidium is a protozoan that causes ... In some cases (25%), there is a red, ring-like rash that occurs at the site of the bite. The rash is often referred to as a “bull’s eye” ...

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 ...