Arthropods
invasive or superficial (infestation) aerobic (kill by suffocation) multicellular
Pathogenic agent
arthropod itself
Vector
venom, egg
Arachnida
spiders, scorpions
Spiders
black widow, brown recluse
Spiders: mechanism for disease
venom -worried about kids (more severe complication)
more dilute
venom in a bigger person
Spiders: symptoms (normal)
muscle cramps, chest pain, nauseas, vomiting, diaphoresis, visual difficulties
Spiders: symptoms (severe)
paralysis, coma, death
Spiders: treatment
self-limiting antivenom (antivenin) --> antibodies (passive immunization)
Spiders: prevention
avoid black widows and brown recluses
Scorpions: mech. for disease
hemolytic toxin, neurotoxin
Scorpions: symptoms (normal)
burning pain, swelling and necrosis @ sting site
Scorpions: symptoms (severe)
chills, diaphoresis, salivations, muscle spasms, seizures, death
Scorpions: treatment
Cold: slows blood flow --> decreases toxin distribution antivenom
Scorpions: prevention
don't get stung
Insecta
insects as vectors vs pathogens mites
Insects as vectors
bacteria, parasites, viruses
Insects as pathogens
bites that are self-limiting or need treatment
Mosquitos, bed bugs, gnat, fleas
cause annoying bites that are self-limiting
lice, crabs
cause annoying bites that need treatment
Mites (lice): mech. for disease
deposition of eggs
Mites (lice): symptoms
itching
Mites (lice): treatment
be bald, special shampoos (suffocate)
Mites (lice): prevention
no hair, treat individuals who have it