INTRODUCTION TO TREAMTODES AND PARAGONIMUS Flashcards
also called flukes
It is dorsoventrally flattened
unsegmented
oval to lancet shape
trematodes
All trematodes are dorsoventrally flattened except _________
Schistosoma
All trematodes have operculated ova except ___________
schistosoma
All trematodes are hermaphroditic except for _________
Schistosoma
All trematodes lay embryonated egg except ________
Paragonimus
Echinostoma
Fasciola
Fasciolopsis
Artyfechinostomum
_________ have a relatively thick integument, which bear many spines and sensory papillae
parasitic flukes
inverted Y shaped and will end blindly
Intestine
Digestive system of cestodes
Oral sucker
Pharynx
Intestine
paired testes located on the posterior portion of the body
male reproductive system
Male reproductive system
Take note if they are:
1.
2.
3.
Globular (round)
Branched (dendritic)
Lobate (lobulated or lobed)
single ovary which can be round , lobed, or branched (dendritic)
Female reproductive system
found anterior to the paired testes
Female reproductive system
All have redia stage except ___________
schistosoma
Redia
__________ can produce cercaria or a next amplification generation like redia
sporocyst
___________ has features of the adult flukes like the oral and ventral suckers and gut
redia
________ is mobile in the snail and prey on sporocst or redia of the same of other species (competition)
redia
Classification Based on Habitat
Blood flukes
* Liver flukes
* Intestinal flukes
* Lung fluke
BLIL
Description of the diagnostic stage
- Yellowish brown
- Operculated
Unembryonated - Thickened posterior end (abopercular end)
- Seen in sputum or stool (if the person is swallowing his sputum)
Sundathelphusa philippina
_____________: posterior ends are not thickened
Fasciola/Fasciolopsis/Echinostoma eggs:
Paragonimus Adult
The body is elliptic, dorsoventrally it is flattened, _________________
* It looks like half a ______________ shaped
* The ____________ is located in the central position of the body.
reddish-brown in color
peanut or coffee bean
ventral sucker
___________ is coffee-bean shape
Adult
Pathogenesis
* In the lungs, _____________ provoke granulomatous reaction that leads to the formation of ___________
Within the _______ is blood-tinged purulent materials containing eggs
Paragonimus adult
capsule/cyst
cyst
Clinical presentations
- __________ the miss the lungs due to the circuitous route produce extrapulmonary symptoms due to granuloma or cyst or abscess formation
Muscle
Abdominal organs and liver
* Genitals
Brain
Heart
* Lymph nodes
MAGBHL
Paragonimus westermani
Cercariae invade the crustacean and encyst into metacercariae.
Life Cycle of
Paragonimus westermani
* Worm traverses the intestinal worm and escapes into the peritoneal cavity
- Wanders around the peritoneal cavity and embeds itself in the abdominal wall for days
- The parasite the returns to the coelom then migrates towards the diaphragm and pleural cavity
65-90 days of development in humans
Paragonimus westermani
