Pathogenic Exam 3 Part 2

A Wright's stained blood smear reveals normal sized RBC's with a trophozoite form that has a "band" across the RBC. There is no cytoplasmic stippling. The most likely parasite is:

Plasmodium malariae

Plasmodium vivax

Plasmodium falciparum

Plasmodium ovale

Plasmodium malariae

Blackwater fever and Cerebral malaria caused by the blocking of blood vessels by parasitized RBC's is a complication of infection and one of the worst cases of malaria, caused by:

Plasmodium vivax

Plasmodium malariae

Plasmodium falciparum

Plasmodium ovale

Plasmodium falciparum

Which of the following parasites has a crescent shaped gametocyte which is the most useful stage for identification of this particular one?

Plasmodium vivax

Plasmodium falciparum

Plasmodium malariae

Plasmodium ovale

Plasmodium falciparum

A 43 year old man was admitted to the hospital following a two week history of low grade fever, malaise and anorexia.

Examination of a Giemsa stained blood smear revealed many intraerythrocytic parasites. Further history revealed frequent camping trips near Martha's Vineyard and Nantucket Island in Massachusetts, but NO TRAVEL OUTSIDE the USA. This parasite is most likely:

Plasmodium vivax

Babesia sp.

Plasmodium malariae

Plasmodium falciparum

Babesia sp.

A patient is suspected of having amoebic dysentery. Upon microscopic examination of a fresh fecal specimen for ova and parasites, the following data were obtained: progressive, unidirectional crawl evenly distributed peripheral chromatin finely granular cytoplasm

This information probably indicates:

lodamoeba butschlii

Endolimax nana

Entamoeba coli

Entamoeba histolytica

Entamoeba histolytica

Parasitic organisms that are most often transmitted sexually include:

Diphyllobothrium datum

Trichomonas vaginalis

Dientamoeba fragilis

Entamoeba gingivalis

Trichomonas vaginalis

Which specimen is LEAST likely to provide recovery of Trichomonas vaginalis?

urine

vaginal discharge

urethral discharge

stool

stool

One of the following protozoan organisms has been implicated in waterborne and food borne outbreaks within the United States.

The suspect organism is:

Balantidium coli

Pentatrichomonas hominis

Giardia lamblia

Dientamoeba fragilis

Giardia lamblia

A gram stain from a gum lesion showed what appeared to be an amoeba. A trichrome smear showed amoeba with a single nucleus and partially digested PMN's. The correct identification is:

Trichomonas tenax

Entamoeba histolytica / E. disbar

Entamoeba polecki

Entamoeba gingivalis

Entamoeba gingivalis

A 12 year old girl is brought to the ER with meningitis and a history of swimming in a warm-water spring. Motile amoeba are seen in the CSF and are most likely:

Naegleria fowleri trophozoites

lodamoeba butschlii trophozoites

Endolimax nana trophozoites

Dientamoeba fragilis trophozoites

Naegleria fowleri trophozoites