DTM&H - Gut Protozoa & Coccidia
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Entamoeba histolytica
Giardia spp
Trichomonas vaginalis
Balantoides coli
Blastocystis - CORRECT ANSWER - Name 5 Gut protozoa know to cause disease in
humans?
1. Giardia
2. Cyclospora - CORRECT ANSWER - Name 1 protozoa and one coccidia that affects the
small intestine and therefore causes watery diarrhoea and malabsorption?
9 species
Entamoeba histolytica is the pathogenic form - CORRECT ANSWER - How many species
of entamoeba infect humans? Which is the pathogenic form?
E. gingivitis - CORRECT ANSWER - Which species of entamoeba is not found in the
gut?
Histolytica/dispar - CORRECT ANSWER - Which cysts of entamoeba are identical under
a microscope?
False - doesn't need to cause disease to complete the life cycle - CORRECT ANSWER -T
or F: Entamoeba histolytica causes disease as part of its natural lifecycle?
- Cysts get ingested through contaminated food and go into small intestine
, - Hatches in large intestine
- Then eats bacteria
- Then reforms into cyst and passes out in stool - CORRECT ANSWER - How do we get
infected with entamoeba histolyta?
Bacteria - CORRECT ANSWER - What does entamoeba histolytica eat in the large
intestine?
Invades through epithelium of large bowel - causes disease
Can also travel to the liver and set up an abscess
Rarely travels to brain or lungs - CORRECT ANSWER - Why does entamoeba histolytica
cause disease? (2)
Large colon - CORRECT ANSWER - Where in the intestinal tract does entamoeba cause
disease?
Starts as watery diarrhoea
Gradually progresses over a number of weeks to dysentery
Can cause fulminant colitis - CORRECT ANSWER - What symptoms does Entamoeba
histolytica cause?
Adult males - CORRECT ANSWER - When E histolytica causes a liver abscess, who does
it commonly affect?
R lobe of the liver - CORRECT ANSWER - Where are amoebic liver abscesses most
commonly found?
False - pathogen may be cleared from the bowel but still form an abscess in the liver -
CORRECT ANSWER - T or F: absence of cysts in the stool rules out an amoebic liver
abscess?
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Entamoeba histolytica
Giardia spp
Trichomonas vaginalis
Balantoides coli
Blastocystis - CORRECT ANSWER - Name 5 Gut protozoa know to cause disease in
humans?
1. Giardia
2. Cyclospora - CORRECT ANSWER - Name 1 protozoa and one coccidia that affects the
small intestine and therefore causes watery diarrhoea and malabsorption?
9 species
Entamoeba histolytica is the pathogenic form - CORRECT ANSWER - How many species
of entamoeba infect humans? Which is the pathogenic form?
E. gingivitis - CORRECT ANSWER - Which species of entamoeba is not found in the
gut?
Histolytica/dispar - CORRECT ANSWER - Which cysts of entamoeba are identical under
a microscope?
False - doesn't need to cause disease to complete the life cycle - CORRECT ANSWER -T
or F: Entamoeba histolytica causes disease as part of its natural lifecycle?
- Cysts get ingested through contaminated food and go into small intestine
, - Hatches in large intestine
- Then eats bacteria
- Then reforms into cyst and passes out in stool - CORRECT ANSWER - How do we get
infected with entamoeba histolyta?
Bacteria - CORRECT ANSWER - What does entamoeba histolytica eat in the large
intestine?
Invades through epithelium of large bowel - causes disease
Can also travel to the liver and set up an abscess
Rarely travels to brain or lungs - CORRECT ANSWER - Why does entamoeba histolytica
cause disease? (2)
Large colon - CORRECT ANSWER - Where in the intestinal tract does entamoeba cause
disease?
Starts as watery diarrhoea
Gradually progresses over a number of weeks to dysentery
Can cause fulminant colitis - CORRECT ANSWER - What symptoms does Entamoeba
histolytica cause?
Adult males - CORRECT ANSWER - When E histolytica causes a liver abscess, who does
it commonly affect?
R lobe of the liver - CORRECT ANSWER - Where are amoebic liver abscesses most
commonly found?
False - pathogen may be cleared from the bowel but still form an abscess in the liver -
CORRECT ANSWER - T or F: absence of cysts in the stool rules out an amoebic liver
abscess?
