Strongyloides

Question 1

1. Name this parasite (size: 190 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 1

1. Strongyloides stercoralis
2. Rhabditiform Larvae (L1)
3. Within the size range (180-380 um) for S. stercoralis rhabditiform larvae. Esophagus extends ~1/3 of the body length. Prominent genital primordium. Short buccal canal
4. Ivermectin

Question 2

1. Name this parasite (size: 510 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 2

1. Strongyloides stercoralis
2. Filariform Larvae (L3)
3. Within the size range (up to 600 um) for S. stercoralis filariform larvae. Esophagus to intestine ratio of 1:1. Notched tail. Inconspicuous/barely discernible genital primordium.
4. Ivermectin

Question 3

1. Name this parasite (size: 225 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 3

1. Strongyloides stercoralis
2. Rhabditiform Larvae (L1)
3. Within the size range (180-380 um) for S. stercoralis rhabditiform larvae. Esophagus extends ~1/3 of the body length. Prominent genital primordium. Short buccal canal
4. Ivermectin

Question 4

1. Name this parasite (size: 370 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 4

1. Strongyloides stercoralis
2. Rhabditiform Larvae (L1)
3. Within the size range (180-380 um) for S. stercoralis rhabditiform larvae. Esophagus extends ~1/3 of the body length. Prominent genital primordium. Short buccal canal
4. Ivermectin

Question 5

1. Name this parasite (size: 320 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 5

1. Strongyloides stercoralis
2. Rhabditiform Larvae (L1)
3. Within the size range (180-380 um) for S. stercoralis rhabditiform larvae. Esophagus extends ~1/3 of the body length. Prominent genital primordium. Short buccal canal
4. Ivermectin

Question 6

1. Name this parasite (size: 290 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 6

1. Strongyloides stercoralis
2. Rhabditiform Larvae (L1)
3. Within the size range (180-380 um) for S. stercoralis rhabditiform larvae. Esophagus extends ~1/3 of the body length. Prominent genital primordium. Short buccal canal
4. Ivermectin

Question 7

1. Name this parasite (size: 530 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 7

1. Strongyloides stercoralis
2. Filariform Larvae (L3)
3. Within the size range (up to 600 um) for S. stercoralis filariform larvae. Esophagus to intestine ratio of 1:1. Notched tail. Inconspicuous/barely discernible genital primordium.
4. Ivermectin

Question 8

1. Name this parasite (size: 430 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 8

1. Strongyloides stercoralis
2. Filariform Larvae (L3)
3. Within the size range (up to 600 um) for S. stercoralis filariform larvae. Esophagus to intestine ratio of 1:1. Notched tail. Inconspicuous/barely discernible genital primordium.
4. Ivermectin

Question 9

1. Name this parasite (size: 480 um) to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 9

1. Strongyloides stercoralis
2. Filariform Larvae (L3)
3. Within the size range (up to 600 um) for S. stercoralis filariform larvae. Esophagus to intestine ratio of 1:1. Notched tail. Inconspicuous/barely discernible genital primordium.
4. Ivermectin

Question 10

This is a histological section of a small intestine

1. Name this parasite to the species level
2. What is the lifecycle stage?
3. State your reasons
4. Name one drug used to treat infection with this parasite

Answer 10

1. Strongyloides stercoralis
2. Adult
3. Numerous adult females with a thin cuticle, paired ovaries and intestines within intestinal tissue
4. Ivermectin