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Description
Flashcards by Caitlin A Moore, updated more than 1 year ago
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Created by Caitlin A Moore
over 2 years ago
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| Question | Answer |
| Arthropod Classes | Arachnida (ticks and mites) Insecta (lice, bugs, fleas, flies) Crustacea (crabs, lobsters, copepods) |
| Distinguishing Features of Arthropods | 1. Bilateral symmetry 2. Segmented body 3. Hard exoskeleton 4. Jointed legs 5. Many pairs of limbs |
| Two types of parasite transmission in whales | 1. Vertical transmission- mother to calf 2. Sexual transmission (STD) |
| What type of Insecta can be seen with similar morphology to whale parasites? | Human lice (both cause itching, sores, infection and lost mating opportunities) |
| What is a Protelean parasite? | An organism that lives parasitically as a larvae and is free living as an adult (example: myiasis of humans is the infection of fly larvae in human tissue) |
| Human Botfly scientific name | Dermatobia hominis |
| Life cycle of the botfly | |
| Humans get 3 types of lice | Head (Pediculus humanus capitis) Body (Ph. corporis) Pubic (Ph. pubis) Body lice is the only to vector disease |
| Characteristics of micropredators | Move from host to host Pathology is intensity-dependent Vectors of disease |
| Vectorborne disease examples | Black legged tick - lyme disease House mosquito - lymphatic filariasis Kissing bug - American trypanosomiasis |
| Black legged tick (Ixodes scapularis) life cycle | Symptoms: fatigue, flu-like symptoms, bulls eye rash |
| What is the phylum, class, and subclass of ticks and mites? | Phylum Arthropoda Class Arachnida Subclass Acari Class Insecta Parasite arachnids: ticks and mites |
| How are ticks and mites different from other arthropods? | -reduced segmentation on posterior -anterior gnathosoma/capitulum -chelicera on each size of mouth for piercing, tearing, gripping -idiosoma -most adults have 8 legs, but some mites have fewer |
| Pathology of a tick infection | -anemia -dermatosis -injection of a vectorborne pathogen -tick paralysis -otoacariasis (grouping in ear) |
| Examples of tick infections | - Borreelia burgdorferi/Lyme disease -Rocky Mountain spotted fever -Babesiosis (Babes microti) -Ehrlichiosis/Anaplasmosis -Tularemia |
| Tick life cycle | |
| Differences between ticks and mites | Ticks: large, terrestrial, usually blood feeders Mites: small, terrestrial/freshwater/marine, tiny-so feed on lymph or other secretions |
| Pathology of Demodex spp. (mites) | -usually benign -loss of eyelashes -granuloma formation -proliferation in absence of immune response |
| Family Trombiculidae | Chiggers "red bugs" Can transmit scrub typhus Larval stage is parasite Nymphs and adults are predators inject proteolytic secretions, suck up juices |
| Family Sarcoptidae | Scabies (Sarcoptes scabei) burrows under skin (linear diagnostic tracks) intense itching transmitted by prolonged contact Canine scabies |
| Family Pyroglyphidae | "house dust mites" abundant in dust house dust allergy |
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