lab 9. ticks relatives to scorpions, mites and spiders parasites (survival dependent on feeding on a...
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LAB 9
TICKS• Relatives to scorpions, mites and spiders
• Parasites (survival dependent on feeding on a host)
• GENERA – Hard Ticks (scutum)– Ixodes species (black – legged tick) • I. scapularis• Ixodes pacificus
– Dermacentor species (wood / dog tick)• D. variabilis (dog)• D. andersoni (wood)
Females can lay up to 8000 eggs on a leafAdults live for about 1 year
•Scutum is the hard shield found on the back • Covers entire back of males•1/3 of the back in females• Ixodes species (carries Lyme disease)
MALE FEMALE
IXODES Species TICK
A = anal groove
B = anus
White markings – Dermacentor sp.
MALE FEMALE
TICK
?WHITE MARKINGS
YES NO
DERMACENTOR SPECIES
(engorged/not engorged)
?ANAL GROOVE
YES
IXODES SPECIES(engorged/not engorged)
?SCUTUMYes…Hard Tick
TICK REMOVAL
DISEASES TRANSMITTED BY IXODES TICK
• LYME DISEASE•Causative agent: Borrelia burgdorferi • Spirochete in the stomach• Transmitted after tick engorged for 36 hours• Fever, headache, fatigue, target lesion
• BABESIOSIS•Causative agent: Babesia microti•Parasite infecting red blood cells
• ANAPLASMOSIS•Causative agent: •Anaplasma phagocytophilum• Bacterium infecting white blood cells
ClassicTarget Lesion
of Lyme
Disease