Laboratory Images

Question 1

Answer 1

E. histolytica trophozoite, 20-60um, 1 nucleus with uniformly distributed chromatin containing a small, compact karyosome that is usually
central

Question 2

Answer 2

E. histolytica cyst, infective stage, typically 12-15 um, 4 nuclei, uniformly distributed with even Peripheral chromatin (may contain a chromatoidal bar seperate from nucleus)

Question 3

Answer 3

Entameoba coli trophozoite, Nucleus with acentric karyosome and asymmetrically arranged peripheral chromatin

Question 4

Answer 4

Entameoba coli cyst, 15-25µm, usually 8 mature nuclei with irregularly clumped chromatin and a karyosome that may be central or accentric

Question 5

Answer 5

Entameoba coli cyst, 15-25µm, usually 8 mature nuclei with irregularly clumped chromatin and a karyosome that may be central or accentric

Question 6

Answer 6

Giardia lamblia trophozoite

Question 7

Answer 7

Giardia lamblia cyst

Question 8

Answer 8

Enterobius vermicularis egg

Question 9

Answer 9

Enterobius vermicularis roundworm

Question 10

Answer 10

Enterobius vermicularis roundworm

Question 11

Answer 11

Cryptosporidium in modified acid fast stain

Question 12

Answer 12

Trichuris trichiura nematode

Question 13

Answer 13

Trichuris trichiura egg

Question 14

Answer 14

Ascaris lumbricoides fertilized egg

Question 15

Answer 15

Ascaris lumbricoides unfertilzed egg

Question 16

Answer 16

Strongyloides stercoralis larva

Question 17

Answer 17

Strongyloides stercoralis larva