Amoebas

Question 1

Entamoeba gingivalis

Answer 1

• commensal, opportunistic on human teeth and gums
• only trophozoite form
• many tiny pseudopodia, food vacuoles

Question 2

Endolimax nana

Answer 2

• oral/anal route
• cyst and trophozoite form
• small amoeba on large intestine
• moves slowly, feeds on bacteria
• large food vacuoles

Question 3

Iodamoeba buetchlii

Answer 3

• humans, primates, pigs
• cyst and trophozoite forms
• short psuedopodia, slow lovement
• large intestine, feeds on GI flora

Question 4

Vahlcampfidae

Answer 4

• bacteriophages
• aerobic soil, sewage, water
• flagellated in addition to amoeba stages
• can be facultative in invertebrates

Question 5

Naegleria fowleri

Answer 5

• “brain eating amoeba”
• nasal –> olfactory nerves –> brain
• trophozoite, cyst, and flagellated forms
• causes PAM

Question 6

Acanthamoeba

Answer 6

• open wounds, nose, eyes
• similar life cycle to Naegleria fowleri with no flagellated form
• causes chronic skin condition, problems with CNS, keratitis