Schistosoma sp. (Part 2) Flashcards
What are the hosts for S. mansoni?
- Human
- Rodent
- Baboon
What are the hosts for S. Japonicum?
- Mice
- Dogs
- Goats
- Rabbits
- Cattle
- Guinea pigs
- Sheep
- Rats
- Horses
- water buffal
What is the PPP for S. mansoni and S. japonicum?
5 weeks
How are S. mansoni and japonicum transmitted?
Similar to S. Haematobium except that it is transmitted in feces.
What is the life cycle of S. mansoni/japonicum?
Similar to S. Haematobium except that adult fluke inside host migrates to messenteric veins of bowl/rectum shedding eggs that circulate to liver and passed in stool.
What are the chronic syndromes of S. mansoni/japonicum?
-Hepatosplenomegaly
-portal hypertension
-hematemesis due to ruptured esophageal varices
-Melana (tarry bloody feces)
-Anemia
-Fibrosis
(Note: the other symptoms, besides chronic stage, are similar to that of S. haematobium)
What is the means of directly diagnosing S. mansoni/japonicum?
-Detection of eggs in stool/rectal biopsy
What are the indirect methods of diagnosing S. mansoni/japonicum?
- Ultrasound for liver morbidity
- Calcified vessels in liver show on ultrasound as Symmer’s Pipe-stem fibrosis
What is Symmer’s Pipe-stem fibrosis?
Calcified vessels in the liver caused by S.mansoni/japonicum
What is the treatment for S. mansoni/japonicum?
Praziquantel
What are the control mechanisms in order to prevent S. Mansoni/japonicum epidemics?
- Kill parasite with chemotherapy
- Kill snails with molluscicides
- Prevent contamination of potential transmission sites
- Prevent people from exposure to infection.
Are schistosoma mansoni/japonicum zoonosis??
Yes
