Flatworms Flashcards
Phylum of flatworms
Platyhelminthes
Class of Flukes
Trematoda
Class of Tapeworms
Cestoda
Other name for fasciolosis
liver fluke disease
What kind of animals are affected by fasciolosis?
grazing animals
health importance of fasciolosis
Emerging food borne, neglected tropical human disease
(Nasturtium officinale)
causative agents of liver fluke disease
Fasciola hepatica (temperate areas)
Fasciola Gigantica (tropical areas)
hosts of F. hepatica
herbivorous mammals
humans
hosts of F. Gigantica
camel
cattle
buffalo
hosts of F. Hepatica with low resistance
sheep
goat
rabbit
hosts of F. Hepatica with delayed resistance
cattle, man
hosts of F. Hepatica with early resistance
pig
dog
cat
appearance & longevity of F. hepatica
leaf like
years
Site of fasciolosis
bile duct
Life cycle of Fasciola
indirect
INtermediate hosts of Fasciola hepatica
Galba Truncatula
phases of Life cycle of faciola hepatica
MI
SPO
RE1
RE2
CE
MCE
Infection of facial hepatica
PO with metacercaria
Epidemiology of Fasciolosis
endemic where condition are suitable for intermediate hosts
MC in late summer or autumn are found in which areas
in cool and temperate areas
MC from spring or early summer (summer fasciolosis) are found in which areas
milder climate
Acute Fasciolosis
- massive short term of MC intake
- sudden death at 2-5 weeks
Chronic fasciolosis
-moderate, prolonged intake of MC
- oedema under the jaw
- hepatic fibrosis
- hypoalbuminemia
diagnosis of fasciolosis
- history (grazing in endemic area)
- detection of eggs (acute fasciolosis no eggs, very similar to rumen fluke eggs)
- détection of antibodies
- detection of coproantigen from faeces
treatment of acute fasciolosis
- stop grazing
- ## Triclabendazole (there is resistance)
treatment of subacute & chronic fasciolosis
any flukicidal effective against flukes 6 weeks or older
Name of Fascioloidosis
large American liver fluke
causative agent of Large American liver fluke
Fascioloides magna
Hosts of Fascioloides magna
N.A.: wapiti, white tailed deer, caribou
EU: Roe-deer, red deer, fallow deer
definitive hosts of Fascioloides magna
deer
Paratenic hosts of Fascioloides magna
cattle
Aberran hosts of Fascioloides magna
sheep & goat
(causes fatal traumatic hepatitis)
Life cycle of Fascioloides magna
similar to F. hepatica with Galba truncatula
detection of eggs of Fascioloides magna
only in definitive hosts
Other name for paraphistomosis
Rumen Fluke disease
Occurence of paraphistomosis
grazing domestic and wild animals
causative agents of paraphistomosis
Paraphistomum ichikawai
P. Leydeni
P. cervi
Calicophoron Daubneyi
C. microbothrioides
C. microbothrium
Which is the most common causative agent of paraphistomosis in Ireland
Calicophoron Daubneyi
predilection site of paraphistomosis
Rumen
Reticulum
Life cycle of paraphistomosis causative agents
Indirect
Intermediate hosts of paraphistomosis causative agents
Freshwater or amphibious snails
Infection of paraphistomosis causative agents
per os with Metacercariae
pathway of paraphistomosis causative agent in hosts
immature –> duodenum, abomasum –> rumen reticulum
Chronic paraphistomosis clinical signs
none
acute paraphistomosis clinical signs
diarrhea
weight loss
inappetence
diagnosis of acute paraphistomosis
NO eggs, juvenile flukes in faeces
diagnosis of chronic paraphistomosis
colorless egg, do not confuse with facial hepatica eggs
English name for Dicrocoeliosis
Lanceolate fluke
Small liver fluke disease
occurence of Dicrocoeliosis
grazing animals
health importance of Dicrocoeliosis
moderate, sometimes humans
health importance of paraphistomosis
none
causative agents of Dicrocoeliosis
Dicrocoelium dentriticum
D. hospes
Where is D. hospes found
tropical region
predilection site of Dicrocoelium
bile duct, gall bladder
Life cycle of Dicrocoeliosis causative agents
indirect
intermediate host of Dicrocoeliosis causative agents
2:
- terrestrial snails
- ants
infection of Dicrocoeliosis causative agents
PO, with ants containing metacercaria
pathways of Dicrocoeliosis causative agents in the hosts
young flukes –> via ductus choledochus –> bile ducts
Pathogenesis of Dicrocoeliosis
Cholangitis
thickening of bile duct wall
fibrosis
cirrhosis
diagnosis of Dicrocoeliosis
detection of eggs (dark brown, thick shelled, contains miracidium)
English name for Schistosomatidosis
Blood fluke disease
occurence of Schistosomatidosis
tropical and subtropical zones
public health importance of Schistosomatidosis
very high
causative agents of Schistosomatidosis
Schistosoma bovis
S. mattheei
S. japonicum
S. mansoni (only man)
S. haematobium (only man)
which causative agents of Schistosomatidosis can be found in portal and mesenteric veins
S. bovis
S. japonicum
which causative agents of Schistosomatidosis can be found in intestinal, hepatic and bladder veins
S. Mattheei
which causative agents of Schistosomatidosis can be found in intestinal schistosomosis
S. mansoni
which causative agents of Schistosomatidosis can be found in urinary or bladder
S. Haematobium
description of Schistosomatidosis causative agent
sexual dimorphism
male broad and flat
longer female
life cycle of Schistosomatidosis causative agent
indirect
intermediate hosts of Schistosomatidosis causative agent
freshwater snails
infection of Schistosomatidosis causative agent
percutan
PO furcocercaria
clinical signs of Schistosomatidosis
- cercarial dermatitis
Acute: fever
Chronic: granulomatous inflammatory response
Opishtorchiosis occurence
Fish consuming animals
public health importance of Opishtorchiosis
cholangio-carcinoma in dogs, cats and humans
Causative agent of Opishtorchiosis
Opisthorchis felineus
English name of Opisthorchis felineus
cat liver fluke
life cycle of Opishtorchiosis
indirect
intermediate hosts of Opishtorchiosis causative agents
snails
infection of Opishtorchiosis causative agents
infected fish containing metacercaria
–> through ductus choledochus
–> bile duct, gallblader
cycle of Opishtorchiosis causative agents
MI- SPO - RE -CE
diagnosis of Opishtorchiosis
detection of eggs, miracidium inside
Alariosis occurrence
temperate climate of Europe, Asia and america
public health importance of Alariosis
prevalence in wild carnivores, eye of human
causative agents of Alariosis
Alaria alata
A. marcianae
A. canis
Predilection site of Alariosis
small intestines
life cycle of Alariosis causative agents
indirect
intermediate hosts of Alariosis causative agents
snails (cercaria)
tapdoles, frogs (mesocercaria)
cycle of life of Alariosis causative agents
MI –> SPO -> RE1-> RE2 -> CE -> MCE
infection of Alariosis causative agents
PO : mesocercaria
PO: through paratenic hosts (wild boar, poultry, pig)