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Parasites
VN5 week 2
| Term | Definition |
|---|---|
| Ectoparasite | Lives on outside of host |
| Endoparasite | Lives on inside of host |
| Parasite | One eukaryotic organism living off another |
| Eukaryote | Organism in which chromosomes enclosed in a nucleus |
| Direct life cycle | Parasite passes from one host to next without passing through intermediate host |
| Definitive host | Primary host in which parasite matures |
| Paratenic host | Host in which parasite can survive but not develop |
| Vector | Organism that physically transmits parasite from host to host |
| Ectoparasite - insect | 3 pairs of legs, 3 sections of body (lice/flea) |
| Ectoparasite - arachnid | 4 pairs of legs, 2 sections of body (mites/ticks) |
| Biting/chewing/sucking | Types of lice |
| Pediculosis | Infection with lice |
| Nit | Louse egg, cemented to hairs, 2-3 week lifecycle |
| Felicola subrostratus | Cat biting/chewing louse |
| Linognathus setosus | Dog sucking louse |
| Trichodectes canis | Dog biting/chewing louse |
| Ctenocephalides canis/felis | Flea |
| Transmits tapeworm dipylidium caninum | Flea/louse |
| FAD | Flea allergic disorder |
| Myiasis | Flystrike - dipteran fly larvae (green/blue bottles) |
| Trombicula autumnalis | Harvest mite (surface mite) |
| Cheyletiella | Walking dandruff (surface mite) |
| Burrowing mites | Sarcoptes/Notoedres/Cnemidocoptes/Trixacarus |
| Demodex | Cigar-shaped mite found on hair follicles, classified as burrowing, often causes alopecia eg around eyes |
| Otodectes cynotis | Dog/cat/ferret ear mite - visible as white moving dots |
| Ixodes ricinus/canisuga | Tick |
| Endoparasite classes | Helminth/ Protozoa |
| Nematode | Roundworm |
| Cestode | Tapeworm |
| Scolex | Head of tapeworm/cestode |
| Proglottids | Segments of tapeworm/cestode |
| Strobila | Chain of progottids on tapeworm/cestode |
| Echinococcus granulosus/Dipylidium caninum | UK tapeworms |
| Hydatid cyst | Large cyst containing many cestode heads |
| Anthelmintic | Product to kill tapeworms and roundworms |
| Toxocara canis | Zoonotic pathogen, often found in puppies, transferred across placenta |
| Trichuris vulpis | Whipworm, egg shaped like a lemon |
| Aelurostrongylus abstrusus/Angiostrongylus vasorum | Lungworms |
| Coccidia | A protozaol parasite, may cause D+ in birds |
| Toxoplasma gondii | Final host - cat; protozoa that may cause human abortion |
| Giardia | Test may include collection of 3 days faecal sample |
Created by:
jennytinson
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