A municipal water supply had a failure in its mechanical filtration system, allowing particles or organisms < 10 µm to pass through.  Even though chemical decontamination factors were functional above specification standards, many areas of the city report diarrhea disease over the following few weeks.  The majority of cases involved small children, the elderly, and patients with a reported underlying disease or risk factor.  Which of the following parasitic organisms is most likely to blame for this public outbreak?

The reservoir/intermediate hosts for Hymenolepsis diminuta are _____ (M53-4, 5; Level 2).

A microfilaria is observed in a microscopic exam of a fibrous skin nodule removed from the back of a patient from Central America.  The following is the most likely mode of transmission for this nematode (M52-4; Level 2):

For discussion boards and hypothesis assignments, there are two dues. The primary due date for your initial response is on Fridays at 11:59 PM EST and the secondary due date for your peer response is on Sundays at 11:59 PM EST.

Which of the following is considered a liver fluke (M56-4; Level 1)?

An organism isolated from a patient with cystic fibrosis is oxidase positive, citrate and urea positive. The organism produces a K/NR reaction on TSI and oxidizes only glucose in O/F sugar testing.  This organism is most likely (M21-2, 3; Level 3):

The following helminths have a free-living stage.

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 (M50-9; Level 1)?

The following parasite is capable of direct, indirect, and autoinfection (M50-5; Level 2):

The following characteristics describe the Proteus species: