The egg is the diagnostic stage for all of the following EXCEPT:

The life cycle of the following organism typically has 2 intermediate hosts, one of which is a snail:

The infective larvae of Strongyloides stercoralis penetrates the skin and migrates through the circulatory system to the heart and lungs. The organism enters the bronchial tree and is then swallowed, entering the digestive tract, where the organism matures into an adult worm. The common name of this parasite is the:

A 21 yr old female who emigrated from Mexico 3 yrs ago had a seizure.  Previous to this seizure, the female was described as being in generally good health.  A neurological exam demonstrated no focal findings but, upon a CT scan of the head, numerous cysts were noted.  The CSF demonstrated an increased lymphocytes count, a glucose level of 63 mg/dl, and a protein level of 36 mg/dL.  Which of the following is the most likely causative agent?

All of the following organisms have the ability to migrate to the lungs through the circulator system EXCEPT:

Which of the following is considered a liver fluke?

The following eggs possess an operculum:

In his writings, Karl Marx predicted

The examination of human feces is of least use in the detection of:

In the life cycle of hermaphroditic flukes, the most likely infective stage for humans is which of the following?