MODULE 2 UNIT 5

Question 1

motile by means of cilia, which cover their entire body surface

Answer 1

ciliates

Question 2

The only human parasite under ciliates

Answer 2

Balantidium coli

Question 3

largest protozoan parasite of man

Answer 3

Balantidium coli

Question 4

identified as Paramecium coli by Malmsten in 1857

Answer 4

Paramecium coli

Question 5

Balantidium coli was later described and placed under a separate genus in

Answer 5

1863

Question 6

causative agent of the zoonotic disease called balantidiasis, balantidiosis, or balantidial dysentery

Answer 6

Balantidium coli

Question 7

primarily associated with pigs, its normal host

Answer 7

Balantidium coli

Question 8

passes its life cycle in one host and exists in 2 forms: trophozoite and cyst

Answer 8

Balantidium coli

Question 9

patients are asymptomatic or have symptoms of severe dysentery similar to those seen in patients with amebiasis

Answer 9

balantidiasis

Question 10

Generalized symptoms and signs include chronic and recurrent diarrhea, abdominal pain, cramping, vomiting, weakness, and weight loss.

Answer 10

balantidiasis

Question 11

has a potential to invade tissues

Answer 11

B. coli

Question 12

responsible for the intestinal ulcers that are wide-mouthed with rounded base

Answer 12

active motility and hyaluronidase of B. coli

Question 13

These occur in the ileum, cecum and rectum but there is no extraintestinal spread.

Answer 13

B. coli

Question 14

Secondary infection is frequent.

Answer 14

B. coli

Question 15

The main complication is perforation.

Answer 15

B. coli

Question 16

Geographical distribution: Cosmopolitan; Prevalence: (Phil) <1%; Transmission: Fecal-oral route

Answer 16

B. coli

Question 17

B. coli’s most important reservoir host for human infection

Answer 17

Hogs

Question 18

Risk factor for B. coli infections

Answer 18

direct contant with hogs

Question 19

increase B. coli infection rate

Answer 19

Poor personal hygiene and poor sanitary conditions

Question 20

Cysts are the stage responsible for transmission of balantidiasis 1) Identify the species; 2) Order of cycle

Answer 20

1) Balantidium coli; 1

Question 21

The host most often acquires the cyst through ingestion of contaminated food or water 1) Identify the species; 2) Order of cycle

Answer 21

1) Balantidium coli; 2

Question 22

Following ingestion, excystation occurs in the small intestine, and the trophozoites colonize the large intestine 1) Identify the species; 2) Order of cycle

Answer 22

1) Balantidium coli; 3

Question 23

The trophozoites reside in the lumen of the large intestine and appendix of humans and animals, where they replicate by transverse binary fission, during which conjugation may occur 1) Identify the species; 2) Order of cycle

Answer 23

1) Balantidium coli; 4

Question 24

Trophozoites undergo encystation to produce infective cysts 1) Identify the species; 2) Order of cycle

Answer 24

1) Balantidium coli; 5