11 Taenia saginata and bovine cysticercosis Flashcards
1
Q
IH
A
Ruminant
2
Q
FH
A
Human
3
Q
Location
A
IH: Muscle, Liver, Kidneys
FH: Small intestine
4
Q
Morphology
A
- Size: Largest Taenia! 4-10m long
- Scolex: 4 suckers, no rostellum, no hooks
- Strobila: consists of 1000-2000 proglottids
- Proglottids: Gravid proglottids contain about 80.000 egs
5
Q
Eggs
A
- Small
- Spherical/Rounded
- 3x thick shells
- Embryonated w/Oncosphere
- Grey/Brown
6
Q
LC
A
- Gravid proglottids leave the host (spontaneously, 6-9 within a short time), pass with feces of FH (humans)
- In environment, embryonated eggs are released from proglottid to be ingested by IH (ruminants)
- In IH: Oncospere is released in the gut and bores through intestinal wall to reach striated muscle via Lymphatic system or blood vessels
- In IH: In muscle, larvae develops into Cysticercus within 2-3 months
- FH: Ingests raw infected beef with Cysticerci, the larvae is liberated and attaches to the intestinal mucosa by eversion of Scolex and mature - 2 months
7
Q
Epidemiology
A
Eggs can survive for 6-12 months if favorable conditions:
-Liquid manure: 71 days
-City sewage: 16 days
-River water: 33 days
-Pastures: 159 days
Are susceptible to high temperatures and freezing
8
Q
Pathogenesis
A
- Cysticercus bovis - resides in muscles (masticatory, tounge, intercostal and heart)
- Myocarditis, Tachycardia, Tachypnoea
9
Q
Clinical signs
A
- No symptoms
- Severe infection - Weakness, diarrhoe, movement pain, cardiac disorder
10
Q
Treatment
A
- None for Bovine cysticercosis
- Praziquantel and Niclosamide for human infection
11
Q
Control
A
- Cook meat until well done (56C)
- Freeze at -10C for 1 or more weeks
- Avoid using night soil as fertilizer in pature
- Avoid deficating in pasture!
12
Q
Diagnosis
A
Post- Mortem: Meat inspection
Flotation with Breza solution
ELISA
