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16 Cards in this Set
- Front
- Back
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Nematoda |
Round Worms - psuedocoelomate, dioecious, dimorphic |
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Amphid |
Chemosensory organ on the "head" of nematodes ; may be secretory |
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Phasmid |
Chemosensory organ at the posterior and of nematodes |
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Eutely |
Nuclear/cellular constancy - no new cells between juvenile and adult stages; growth comes from increase in cell size instead of cell number |
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General Nematode L.C. |
Egg - J1 - J2 - J3 - J4 - Adults : 4 molts (j3 usually infective stage) |
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Trichuriasis |
Trichuris trichiura |
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Whipworm disease |
Trichuris trichiura |
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Dysentery, anemia, toe/finger clubbing, prolapsed rectum, occasionally death |
Trichuris trichiura Cause: humans infected after eating food contaminated by eggs from feces - "night soil" |
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Trichinosis |
Trichenella spiralis |
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Damage to the lining of the gut, nausea, sweating, diarrhea, secondary infections, fever and facial adema |
Trichenella spiralis early pathology Caused by meat predator consuming infected prey |
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Damage to blood vessels, localized edema, pneumonia, encephalitis, deafness, eye damage, potential death from myocarditis |
Trichenella spiralis - middle phase pathology Caused by circulating J1s damaging cells as they wander and penetrate cells |
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Muscle pain, loss of function of muscle cells, diaphragm encystment = difficulty breathing, masseter muscle = jaw swelling [may be misdiagnosed as mumps], death from heart or kidney failure |
Trichenella spiralis - late pathology Caused by nurse cell formation in muscle tissue |
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Filariform |
Non-feeding J3 stage of hookworms |
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Rhabditiform |
Feeding J1 & J2 stages of hookworms |
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Developmental arrest |
Adaptation to avoid harsh conditions (Ancylostoma duodenale) such as dry seasons [J3] |
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Hookworms |
Necator americanus & Ancylostoma duodenale |
