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Fleas and Lice

Fleas and Lice. Veterinary Entomology 208 Spring 2010. Compound Microscope. Magnification Always start at lowest magnification (lowest power objective) Move to higher objective as necessary (3-4 stations only) Focus Adjust width of oculars Adjust coarse, then fine focus

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Fleas and Lice

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  1. Fleas and Lice Veterinary Entomology 208 Spring 2010

  2. Compound Microscope Magnification Always start at lowest magnification(lowest power objective) Move to higher objective as necessary (3-4 stations only) Focus Adjust width of oculars Adjust coarse, then fine focus If on the highest magnification, only adjust the fine focus to avoid breaking slide Light Use condenser to adjust amount of light (dark vs. glare) Higher magnifications may require more light

  3. Pictorial and Dichotomous Keys • Be sure you read where the key is sending you next, as it can get confusing (particularly with lice) • Look at arrow on insect to see what characteristic is being studied • The small arrows in the key indicate the structure referenced in the couplet

  4. Fleas (Siphonaptera) • 6 specimens: • Ctenocephalides felis • Leptopsylla segnis • Nosopsyllus fasciatus • Echidnophaga gallinacea • Pulex irritans • Xenopysylla cheopis

  5. Flea Anatomy receptaculum seminis

  6. Ocular bristle Below eye In front of eye

  7. Key • 1st couplet: number of combs • We don’t have a 3 comb flea • 2 comb fleas: • Eye presence/absence will separate these 2 species • 1 comb flea: • There is only one in our set • 0 comb fleas: • Head shape separates out Echidnophagagallinacea • Ocular bristle position separates the other 2 species

  8. Mallophaga • 12 specimens of Mallophaga: • Heterodoxus spiniger • Menacanthus stramineus • Menopon gallinae • Chelopistes meleagridis • Goniodes gigas • Goniocotes gallinae • Goniodes dissimilis • Lipeurus caponis • Felicola subrostrata • Bovicola crassipes • Bovicola bovis • Bovicola limbata

  9. Mallophaga Anatomy

  10. Heterodoxusspiniger

  11. M. stramineusvs. M. gallinae

  12. Chelopistesmeleagridis

  13. Goniodesgigas

  14. G. gallinaevs. G. dissimilis

  15. Lipeuriscaponis

  16. Felicolasubrostrata

  17. Bovicolacrassipes

  18. B. bovis vs. B. limbata

  19. Anoplura • 10 specimens of Anoplura: • Pediculushumanus • Phthirus pubis • Haematopinussuis • Haematopinusasini • Haematopinuseurysternus • Solenopotescaplillatus • Linognathus africanus • Linognathus setosus • Linognathus pedalis • Linognathus vituli

  20. Anoplura Anatomy

  21. P. humanusvs. P. pubis

  22. Haematopinuseurysternus

  23. H. suis vs. H. asini

  24. Solenopotescapillatus

  25. Linognathusafricanus

  26. L. setosusvs. L. pedalis

  27. Linognathusvituli

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