4.2.1 Flukes (Trematodes, Blood fluke) Flashcards
Also known as Oriental blood fluke
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
ALL blood flukes has an IS metacercaria
T or F
F
Cercaria
MOT for Schistosoma japonicum
Skin penetration in water
Schistosoma japonicum is endemic in?
Leyte
More frequently found in the superior mesenteric veins draining the small intestine
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
More frequently found in the anterior mesenteric veins draining the small intestine
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
What blood fluke causes:
- Schistomiasis japonica
- Swimmer’s itch
S. japonicum
Definitive host includes:
Dog
Pigs
Cats
Carabais
Cows
Rodents
Monkeys
Man
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
Dx for S. japonicum:
Sensitive for heavy infection
a. MIFC
b. Katokatz
a
Dx for S. japonicum:
egg counting
a. MIFC
b. Katokatz
b
Which among the Sero Dx for S. japonicum is the MOST specific
a. Intradermal test
b. COPT
c. ELISA
b and c
Praziquantel
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
Also known as Vesical blood fluke
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b
S. haematobium causes deposits the larvae in the blood vessel causing infection
T or F
F
Not larvae, egg
MOT for S. haematobium?
Skin penetration in water
Causes urinary schistosomiasis
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b
Causes Katayama fever (Menigoencephalitis)
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
(Posible lahat since may CNS involvement)
Dx: Examination of urine
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b and c
S. haematobium
Urinary schistosomiasis has a prepatent period of?
10-12 weeks
Urinary schistosomiasis has a painful haematuria
T or F
F
Painless
In urinary schistosomiasis, due to inflammation of the bladder and burning micturition, this may lead to bladder ______
carcinoma
Lung and CNS involvement
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b and c
Granulomatous lesion around the ectopic eggs in the spinal cord
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b and c
Also known as Manson intestinal blood fluke
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
Tissue proliferation and repair
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b and c
MOT of S. mansoni
Skin penetration in water
Adult: unlike the flukes, adult schistosomes have the sexes ________, with the female residing in a _______________ within the male.
Male worms are robust, tuberculate and measure ______mm in length. Females are longer (______ mm in length) and slender.
Adult S. mansoni reside in the venous plexuses of the ______________ and in the portal system of the ______of their host
separate, gynecophoral canal
6-12 , 7-17
colon and lower ileum, liver
Causes intestinal schistosomiasis
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
Endoscopy
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
Cystoscopy
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b
Small lateral
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
Large lateral
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
Ova/eggs: hatch at slightly alkaline H2O, knob like lateral spine near the polar ends
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
Ova are large (110-170 um long by 40-70 um wide) and bear a conspicuous terminal spine. Eggs contain a mature miracidium when shed in urine
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b
Ova: eggs are large (114 to 180 um long by 45-70 um wide) and have a characteristic shape, with a prominent lateral spine near the posterior end. The anterior end is tapered and slightly curved. When the eggs are excreted in stool, they contain a mature miracidium
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
1st IH
* Snail: Oncomelania hupensis quadrasi (infected by miracidium form)
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
a
1st IH
* Snail: Bulinus spp.
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
b
1st IH
* Snail: Biomphalaria spp.
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
Prepatent period for Intestinal schistosomiasis?
5-7 weeks
Which among the following causes Dysentery and Hepatosplenomegaly
a. Schistosoma japonicum
b. Schistosoma haematobium
c. Schistosoma mansoni
c
