Exam 5 - Insect Bites, Stings, and Pediculosis Flashcards
Vector
An organism (like an insect) that transmits a pathogen from one organism/source to another
Pandemic
Spreads across many countries and affects many populations
Epidemic
Spread rapidly among a community or region within a short period of time
Interdigital
Occurs between the fingers and toes
Edema
Abnormal accumulation of fluid
Purulent
Containing, discharging, or causing the production of pus
Analgesic
Medication that reduces/eliminates pain
Bites from insects (bedbugs, fleas, mosquitos) and arachnids (ticks and chiggers) are ____
Non-venomous
(NOT spiders)
Angioedema
Edema that is focused on the inner layer of your skin (dermis)
Can be thought of as an allergic reaction (like w/ swelling of the eyes/lips/tongue)
Photosensitivity
Sensitivity to UV rays from sunlight or other light sources
Common causes of insect bites
Lice
Spiders
Chiggers
Bedbugs
Ticks
Mites
(Let Some Cunt Bitch Try Me)
Reactions to insect bites
Typically only local reactions
Can produce severe/life threatening reactions in sensitive patients
What contributes to the characteristics of each type of bite?
Unique biting organs of the insect
All spiders are _____, BUT…
Venomous
Many have fangs that are too small/fragile
What happens when a mosquito bites a person?
They inject anti-coagulant saliva
This causes the itching and the welt
Where are mosquitos found?
Worldwide
Particularly in humid, wet climates
What diseases can mosquitos spread?
Malaria
West Nile
Zika
How do flea bites present on humans?
Bites are usually multiple and grouped
Occur primarily on legs and ankles
Lesion is an erythematous region around the puncture w/ intense itching
Where are bedbugs found?
Worldwide
Hotels and planes
Where do bedbugs hide and deposit eggs?
In the crevices of:
- walls
- floors
- bedding
- linen folds
- furniture
Where and when are people bitten by bedbugs?
At night along exposed skin
Mainly: head, neck, arms, back
How to bedbug bites present?
Clusters of 2s and 3s
Typically in a straight line
Reactions can range from irritation to small dermal hemorrhage
Most report intense itching
What issue is being seen with extermination of bedbugs?
They have developed resistance to common pesticides containing pyrethroids
Still sensitive to heat
How do scabies infect the skin?
Mite burrows into the stratum corneum
Females burrow tunnels into the skin and lay egges
How are scabies spread?
Contagious via skin to skin contact
What causes scabies?
Sarcoptes scabiei
Common infestation sites of scabies?
Between the fingers
Anterior axillary folds
Buttocks
Male genitalia
Wrists (flexor surfaces)
(Bought A BMW)
How are scabies characterized?
Inflammation
Intense itching
How do tick bites occur?
Feed on blood of animals/people by sticking their mouth into the skin
Scabies treatment
Prescription medication
What happens if the head/mouth of a tick is left in the skin? What if the tick is left attached?
If left in skin: intense itching and nodules
If left attached: tick becomes engorged and can stay for 10 days before dropping off
Local reactions of tick bites
Itchy papules
