Trematodes Flashcards
Intestinal species
- Fasciolopsis buski
- Heterophyes heterophyes
- Metagonimus yokogawai
Liver species
- Fasciola hepatica
- Clonorchis sinensis
Lung specie
Paragonimus westermani
Dioecious flukes
• Schistosoma mansoni
• Schistosoma japonicum
• Schistosoma haematobium
Heterophid flukes
Heterophyes heterophyes
Metagonimus yokogawai
____ contain a lidlike structure that under the appropriate conditions flips open to release its contents for further development, called an _____
-eggs
-operculum
Larval stages
Miracidium
Sporocysts
Rediae
Cercariae
Metacercariae
is ciliated, and its prominent internal features include eyespots, various penetration glands, and numerous excretorycells and tubules
Miracidium
are simple, tubular or branched germinal sacs
Sporocysts
are tubular germinal sacs which possess an oral sucker and rudimentary digestive system, a birth pore, and small ambulatory appendages. This one contains developing cercariae.
Rediae
resemble miniature adults, with a similar body shape, digestive system and ornamentation to the adults they will become
Cercariae
Large intestinal fluke
Fasciolopsis buski
Fasciolopsis buski
MORPHOLOGY: EGGS
• Are broadly ellipsoidal, operculated
• Measures 130 to 150 µm long by 60 to 90 µm • Difficult to distinguish from Fasciola hepatica eggs.
Fasciolopsis buski
Morphology: Adult
• Somewhat oblong and fleshy
• Averagesize is 5 by 1.5cm.
• Have a poorly-developed oral and ventral suckers.
• Reside in the intestine of mammalian host
Fasciolopsis buski
- intermediate host:
- genera:
- reservoir host:
- snails
- hippeutis and segmentina
- rabbits, pigs, and dogs
Sheep liver fluke
Fasciola hepatica
Fasciola hepatica main definitive hosts
domestic and wild ruminants
Fasciola hepatica
* definitive host:
* intermediate host (and its genera):
* accidental host:
- DEFINITIVE HOSTS: sheep, cattle, and goats, camelids, cevids, and buffalo
- INTERMEDIATE HOSTS: Snails in the genera Lymnaea, Galba, Fossaria and Pseudosuccinea.
- ACCIDENTALHOST:Humans
Fasciola hepatica disease
FASCIOLOPSIS “SHEEP LIVER ROT”
is limited to the areas of the Far East, including parts of China, Thailand, Taiwan, and Vietnam, as well as regions in India and Indonesia
Fasciolopsis buski
is found worldwide, particularly in areas in which sheep andcattleare raised
Fasciola hepatica
Fasciolopsis buski and Fasciola hepatica treatment
- Infections with Fasciolopsis buski can be treated with PRAZIQUANTEL
- Infections with Fasciola hepatica has been successfully treated with DICHLOROPHENOL(Bithionol).TRICLABENDAZOLE is more effective.