Exercise 4: Family Schistosomatidae (Blood Flukes)

morphology

organ location

Family Schistosomatidae

• members of these family are unique or atypical digenetic trematodes because of their _____ and _____

Schistosoma japonicum

species that occurs in the Philippines

portal

mesenteric vessels

S. japonicum organ locations (2)

man

rats

dogs

cattle

horses

water buffaloes

sheep

goats

pigs

cats

rabbits

S. japonicum definitive hosts (11)

schistosomosis

schistosomiasis japonica

snail fever

bilharziasis

Katayama disease

in man, it causes the disease known (5)

elongate

narrow

unisexual/dimorphic (dioecious)

pairs

S. japonica

• it is _____ and _____ and _____

• adult male and female worms usually occur in _____

longer

more slender

incurved

gynaecophoric canal

permanently carried

S. japonicum

• note that the female is _____ and _____ than the male

• the body of the male is _____ to form a long ventral _____ in which the female is _____

oral

ventral suckers

anterior end

S. japonicum

• the _____ and _____ lie close together near the _____

no pharynx

anterior to the ventral sucker

last quarter of the body

single tube

S. japonicum

• the female has _____

• the esophagus bifurcates just _____

• the ceca reunite in the _____ to be continued as a _____

6-8 lobes

longitudinal row

behind the ventral sucker

elongated

behind the middle of body

fork

posterior quarter of the body

S. japonicum

• male has _____ testes in a _____ just _____

• female - the _____ ovary lies _____, in the _____ where the ceca rejoin

• vitelline glands - fill the _____

Oncomelania hupensis quadrasi (=O. quadrasi)

snail intermediate host of S. japonicum in the Philippines

Family Pomatiosidae

family of IH of S. japonicum

acuminate

oval

dextral

light brown

black

1-5 mm

smooth-shelled

O. hupensis

Oncomelania hupensis quadrasi characteristics

• _____

• aperture - _____ and _____

• shell - _____ to partly or wholly _____

• length - _____

• this snail is among the _____ subspecies of _____

Schistosoma bovis

Schistosoma mattheei

Schistosoma nasalis

Schistosoma indicum

Schistosoma incognitum

• species of Schistosoma that does not occur in the Philippines

• species occurring in wild and domestic animals (5)

Schistosoma haematobium

Schistosoma mansoni

Schistosoma intercalatum

• species of Schistosoma that does not occur in the Philippines

• species occurring in man (3)

urinary schistosomosis

Schistosoma haematobium in man causes _____

intestinal schistosomosis

S. mansoni and S. intercalatum in man causes _____