Phylum Platyhelminthes. Parasitic Flatworms (Flukes & Tapeworms). II. Class Trematoda Endoparasitic flukes - inside host Wide , flat with oval or elongate bodies Have 2-3 hosts :
(Flukes & Tapeworms)
Signs and Symptoms: enlarged liver
liver failure, feeling of fullness, abdominal discomfort, jaundice, fatigue, weakness, nausea, and weight loss.
Signs and Symptoms: Fasciolosis
Humans: fever (usually first symptom), Abdominal pain, loss of appetite, nausea, diarrhea, respiratory problems, chest pains, anemia, jaundice
Animals: there can be four different types; Type I, Type II, Subacute, and Chronic. These are based on the number of ingested metacercariae with Type I being the most (more than 5000 ingested). Sudden death, weakness, anemia, weight loss, etc.
Fluke Life Cycle
http://www.goatbiology.com/animations/fasciola.html (common fluke life cycle)
a. Scolex- head-like structure; hooks & suckers for attachment (not feeding)
b. Neck- contains immature proglottids- series of repeating units of reproductive organs.
c. Strobila- rest of body; mature and gravid (pregnant with eggs) proglottids
a. No mouth or digestive tract.
b. Absorb nutrients directly across their body wall.
Forms a “bladder worm” in muscle tissue
a. Scolexb. Proglottidc. strobila
a. Trueb. false
a. Snailb. Mosquitoc. tapeworm
a. Mosquitob. Snailc. pig
a. Zooidb. Bladderwormc. Muscle worm