additional Flashcards
Size: Adult worms are relatively small, ranging from 2 to 4 meters in length.
Scolex: Features a small, rounded scolex with four suckers and a rostellum armed
with hooks.
Proglottids: The mature proglottids are wider than they are long and contain a
uterus with 7 to 11 lateral branches, each ending in an egg.
Genital Pore: Located laterally on mature proglottids.
Eggs: Oval-shaped, with a radially striated shell.
t solium
Size: Adult worms are larger, ranging from 4 to 10 meters in length.
Scolex: Features a larger, rounded scolex with four suckers but lacks a rostellum
or hooks.
Proglottids: Mature proglottids are longer than they are wide and contain a
uterus with 12 to 32 lateral branches, each ending in an egg.
Genital Pore: Located medially on mature proglottids.
Eggs: Oval-shaped, similar to T. solium, with a radially striated shell.
t saginata
Size: Similar in size to Taenia saginata, ranging from 4 to 8 meters in length.
Scolex: Resembles the scolex of Taenia saginata, featuring four suckers but
lacking a rostellum or hooks.
Proglottids: Morphologically similar to T. saginata, with mature proglottids being
longer than they are wide, and a uterus containing multiple lateral branches.
Genital Pore: Located medially on mature proglottids.
Eggs: Oval-shaped, similar to T. solium and T. saginata, with a radially striated
shell.
t asiatica
are the only two
species belonging to the family lymenolepididae that are
known to infect man.
Hymenolepis nana and H. diminuta
parasite in rats that can cause human
infections.
H. diminuta
one of the most common cestodes
affecting man, especially children,
H. nana is
The most characteristic morphologic feature of
this group is the small number of testes, usually just three,
the unilateral genital pores, and the large external seminal
vesicle.
hymenolepis spp.
most widespread helminthic infection.
pinworm
how many eggs does gravid female vermiculari deposit
4,600 to 16,000 eggs
where is e vermicularis prevalent i
subtropical countries
angiostrongylus cantonensis lays how many eggs
15,000 eggs
paratenic and definitive host of angiostrongylus cantonensis
paratenic host = freshwater prawn or crab. definitive host = rat
their egg are unemryonated when oviposited
angiostronylus cantonensis
trichinella spiralis type parasite
parasiic roundworm
smallest human nematode parasite
t spirlais
2 type of trichinella
encapsulatingand and non-encapsulating all species of t spiralisare morphologicially indistinguishable
encapsulating species of t spiralis
t.t spiralis
t nativa
t britovi
t murelli
t nelsoni
non encapsulating speccies
t pseudospiralis
t papuae
t zimbabwensis
disease in t spiralis
trichinaisais
secretry function of t spirals
schistosome.
tissue of t spiralis lining tissue of adut and larva
stichocyte
life cycle f t spiralis depends on
transmission and mammalian host involved
life cycle of t spiralis
domestic, sylvatic-tropical, sylvatic temperate and sylvatic arctic
domesttic life cycle
t sralis
sylvatic tropical
t nelsoni
sylvatic temperate
t britovi, t murrelli
slylvatic articulationt
t nativa
posterior c philipinensis female
anterior end
Oviparous
Larviparous
Requires an arthropod intermediate host in
its life cycle.
h diminuta
natural definitive
hosts. of h nanaa
man, mice, rat
immediate host of h diminuta
arthropod
recognized as a true zoonosis,or zoonotic
h diminuta
direct fecal smea, wet smear, stoool analysis diagnosis
hymenollepis spp
the parasite has an
indirect life cycle, with fleas
d caninum
(attachment or holdfast organ),
scolex
anterior tip of the scolex is a
rostellum, which is armed with several
circles of hooks.4 circular muscular sucker
d caninum
ribbon shaped segmenr with anterior scolex
d caninum
eggs are grouped in egg pockets
d caninum
egg has fragle shell with typical hexacanth larva with six hook.
d caninum egg
intermediate host of d caninum
flea and lice
transmission of d caninumin humans
ingestion of infected flea
diagnosia of d caninum
pcr, fecal flotation,, antigen detection of mature proglottid
ovoid, golden-brown, and have an operculum at one end with a small
thickening of the shell at the opposite end
d latum egg
North
America. paragonimus
o. kellicoti
food-borne helminthiasis, and one of the FBH
p estermani
adult form is reddish brown, ovoid, and thick and fleshy.
Egg-shaped fluke and/or resemble a coffee bean shape.
pp westermani
operculated egg are ovoid,
and asymmetrically flattened on
one side.
p westermani
egg is unembryonated when
excreted in stool or sputum.
p westermani
Embryonated eggs
“Miracidia”, hatch and
seeks the first
Intermediate Host:
p westermani
miracidia stage
sporocysts and 22 stage of rediae
intermediate host of p westermani
snail (first), freshwater crabcrayfish
Clinical signs/symptoms are sometimes confused with Pulmonary
Tuberculosis
transmission of p westermani
used in the integrated
paragonimiasis and pulmonary tuberculosis surveillance. ]
technique can differentiate the causative agents of pTB (acid-
fast baccili) and paragonimiasis from one another.
Ziehl-Neelsen Staining (ZNS)
used
when the sputum is too viscous, a 3% of sodium hydroxide is
added and processed for clearing and concentration.
naoh concenrtation technique
definitive host of p westermani
mammals
reservoir host/paratenic host
mammal pork and wild pig that eat crustaceans
