TAMU ENTO 208 - Final Exam Study Guide (21 pages)

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Final Exam Study Guide

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Final Exam Study Guide


Ticks, Kissing Bugs, Mites, Control Includes in class lectures and online lectures, as well as practice questions

Study Guide
Texas A&M University
Ento 208 - Veterinary Entomology

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ENTO 208 1st Edition Exam 3 Study Guide Lectures 18 21 Also contains the online lectures Lecture Main Points Practice questions Lecture 18 Ticks Intro I Phylogeny a Ixodida order suborder i Families Ixodidae hard ticks Argasidae soft ticks Nuttalliellidae African ticks II Importance a All ticks are parasites b Greatest variety of disease transimittance among arthropods c Second most important animal human health vector III Anatomy main parts for Tick ID a Male vs Female for soft ticks i Scutum covers upper half of dorsal side for females covers entire dorsal side for males IV Genera a Ixodes i Lyme disease vector ii Largest tick genus species b Dermacentor i Short palps Scutum ornamented c Amblyomma i Long palps ii Scutum ornamented lone star tick has a white dot on dorsal side d Otobius i Single host tick ii Adults leave host don t feed just mate and lay eggs iii Not known to transmit disease there are soft ticks known to do so V Tick life stages a Larvae 6 legs b Nymph 8 legs highest risk of human infection host seek in late spring summer c Adult host seek in fall as well Tick must be attatched for 48 hours to transmit agent Lecture 19 Tick borne diseases Tick behavior Host seeking passive ambush active hunters Questing behavior ixodes scapularis Hunting lone star Tick Ecology Varying degrees of host specificity Host utilization depends on availability Nidicolous ticks live in nests or other shelters used by the hosts Non nidicolus Dispersed throughout landscape attacking passing hosts Direct impact Dermatitis Alopecia Exsanguination Tick toxicosis Tick paralysis Allergies Lyme disease Agent Borrelia burgdorferi spirochete 1 reported vector borne disease in US Vectored by Black legged tick ixodes scapularis carried by white footed mouse In humans early stage bulls eye rash flu like symptoms Late stage several months later cardiac neurologic arthritic abnormalities Rocky Mountain spotted fever Agent rickettsia rickettsii Vectored by Dermacentor variablis Babesiosis

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