Order Digenea: Genus Fascioloides Flashcards
Common name of Fascioloides
Large American liver fluke
Fascioloides “large american liver fluke”
• Large (2-10 cm), oval, thick flesh-colored fluke
• No distinct anterior cone
Final Host of Fascioloides magna
white-tailed deer
Intermediate Host of Fascioloides magna
Lymnaea sp.
Fossaria sp.
Siagnocola sp.
Predilection site of Fascioloides magna
Liver tissue and/or bile duct
Life Cycle of Fasciola spp.
Ruminant Host- EGG- egg containing MIRACIDIUM- miracidium penetrating small- SPOROCYST- REDIA- CERCARIA- METACERCARIA
Forms of the Disease
Acute and Chronic
ACUTE forms of the Disease
- less common
- liver necrosis and hemorrhage
- associated with BLACK DISEASE which is caused by CLOSTRIDIUM NOYVI
Chronic form of disease
- most common
- hepatic fibrosis and hyperplastic cholangitis
- pipe stem liver
- hazel nut sized cysts
- bottle jaw
Diagnosis of Fasciola spp.
- fecal exam
- skin test
- ELISA
drug of choice for fasciola spp.
Triclabendazole
-large, (2-10 cm), oval, thick flesh-colored fluke
Fascioloides “large american liver fluke”
no distinct anterior cone
Fascioloides “large american liver fluke”
Final host is white tailed deer are the normal definitive host although other ruminants may be affected
Fascioloides magna
Distribution of Fascioloides magna
North and Central America: Europe
Vet. significance of Fascioloides magma
low in sheep; may be high in cattle
Life cycle similar with Fasciola
Fasciolopsis
9-13 wks prepatent period
Fasciolopsis
Large (3-7 cm)
Fasciolopsis
infection acquired by ingestion of encysted MC in tubers of water plants like water chestnut which are eaten raw by animals
Fasciolopsis
scientific name of water chestnut
Eliocharis tuberosa
final host are man and pigs
fasciolopsis buski
Intermediate host of Fasciolopsis buski
Planorbis sp., Segmentina sp.
predilection site of Fasciolopsis buski
small intestine
Distribution of Fasciolopsis buski
South and Southeast Asia
Pathology of Fasciolopsis buski
Diarrhea, intestinal ulceration, emaciation, emaciation and anemia in humans
less pathogenic in dog and pig
Fasciolopsis buski
oral sucker, ventral sucker (terminal end, maggot appearance)
Paramphistomoidea (amphistomes)
common name of paramphistomoidea (amphistomes)
conical flukes or stomach flukes
pear-shaped, red or pink in color.
paramphistomes
Paramphistomoidea (Amphistomes)
° also known as PARAMPHISTOMES, CONICAL FLUKES, or STOMACH FLUKES
° PEAR-SHAPED, RED or PINK in color
° Suckers are situated at each extremity
° PHARYNX are ABSENT
° with SIMPLE CECA
with ventral pouch, body not divided into 2 parts
Gastrothylacidae
without ventral pouch, body not divided into 2 parts
Paramphistomidae
without ventral pouch, body divide into 2 parts
gastrodiscidae
Genera of Family Gastrothylacidae
• Fischoederius
• Carmyerius
• Gastrothylax
• Velasquezotroma
Fischoederius in rumen of cattle and carabao
F. elongatus
F. cobboldi
Carmyerius in rumen
C. synethes
C.gregarius
Gastrothylax in rumen
G. crumenifer
Velasquezotroma in rumen of buffaloes
V. brevisacus
Genera of Family Paramphistomidae
• Paramphistomum
• Calicophoron
• Gigantocotyle
• Cotylophoron
• Ceylonocotyle/Orthocoelium
Paramphistomum in rumen and reticulum
P. cervi
Calicophoron in rumen
C. calicophorum
C. crassium
Gigantocotyle in liver of cattle and carabao
G. batycotyle
Gigantocotyle in bile duct, gallbladder, and duodenum of cattle and buffalo
G. explanatum
Cotylophoron in rumen and reticulum
C. cotylophorum
Genera of Family Gastrodiscidae
• Gastrodiscus
• Homologaster
Genera of Family Gastrodiscidae
• Gastrodiscus
• Homologaster
Host of Gastrodiscidae
mainly found in ruminants but may also be present in pigs and horses
Intermediate Host of Gastrodiscidae
Planorbis sp., Bulinus sp., Galba sp., Lymnaea sp.
Site of Gastrodiscidae
rumen and reticulum
Life Cycle of Gastrodiscidae
generally similar patterned with FASCIOLA, but the prepatent period is only 7-10 weeks and the entire life cycles takes 14-16 weeks
Treatment of Gastrodiscidae
Albendazole
