Lice, Scabies, Spider Bites Flashcards Preview

Dermatology > Lice, Scabies, Spider Bites > Flashcards

Flashcards in Lice, Scabies, Spider Bites Deck (46)
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1

Medical Term for Lice

Pediculosis

2

Define Pediculosis

Ectoparasites that live on the body & feed on human blood after piercing the skin

3

Clinical Presentation

Pururitis
Secondary cellulitis
Pubic lice: eval for other STIs
Pink eye
Swollen lymph nodes

4

Diagnosis of Pediculosis

Eggs (nits)
Nymphs
Mature lice
Found behind ears & back of neck
Wood lamp of area

5

Focus of Treatment of Pediculosis

Neurotoxicity
Suffocation via "coating"
Hyper-excitation & death by paralysis

6

Treatment of Pediculosis

Permethrin 1% lotion (Nix)
Benzyl alcohol 5% lotion (Ulesfia)
Spinosad 0.9% (Natroba)
Environmental control

7

Medical Term for Scabies

Sarcoptes Scabiei

8

What is scabies?

Parasite that burrows under the host's skin causing intense itching

9

Transmission of Scabies

Objects
Direct skin to skin contact
Crowded conditions

10

How long until patient's become symptomatic?

2-6 weeks

11

What causes the itching?

Allergic reaction to the mites
Worse with warmth
Usually worse at night
Watch for excoriation

12

Diagnosis of Scabies

Scraping of skin
View under microscope

13

Treatment for Scabies

Permethrin Cream 5%
Lindane Lotion 1%
Oral Ivermectin

14

SE of Permethrin Cream 5%

Mild to moderate burning & stinging
Itching
Rash
Redness

15

Education for Permethrin Cream 5%

Apply head to toe
Leave on 8-14 hours then wash with soap & water
Repeat in 7 days
Treat family members & sexual partners

16

Other Treatment for Scabies

Wash clothing, bedding, towels in hot water & dry with hot temp
Pruritis: atarax (hydroxyzine), benadryl
Steroid cream

17

Lindane Lotion 1% for Scabies

More neurotoxic
Head to toe

18

Oral Ivermectin

More effective than Lindane
Less effective permethrin
Oral medication

19

2 Spiders That are a Threat to Humans

Black widow
Brown recluse

20

Insect Bites that Mimic Spider Bites

Ant bites
Bedbug bites
Flea bites
Fly bites
Reduviid bug bites
Mite bites
Tick bites

21

Skin Disorders that Mimic Spider Bites

Erythema chronic migrans
Erythema nudism
Leukocytosclastic vasculitis
Sporotrichosis
Toxic epidermal necrolysis

22

Infections that Mimic Spider Bites

Chronic herpes simplex
Cutaneous anthrax
Disseminated gonococcal infection
MRSA
Septic emboli in endocarditis or IVDU

23

Trauma that Mimics Spider Bites

Self-inflicted injuries
Subcutaneous drug injection

24

Location of Black Widow Spiders

Worldwide

25

Location of Recluse Spiders

North & South America

26

Acute Presentation of Spider Bites

Appears within minutes
Papule
Pustule
Wheal

27

Recent History with Black Widow Spider Bites

Recent

28

Symptoms of Black Widow Spider Bites

Muscle pain
Mild pain at site
Tremor
Weakness
Shaking of the extremity
Distressed & inconsolable (infants & children)
Refusing food & drink (infants & children)
Generalized erythema

29

Physical Findings of Black Widow Spiders

VS normal (70%)
Intermittent muscle rigidity & tenderness adjacent to the bit
Weakness
Tremor
Myoclonus
Diaphoresis
Blanched circular patch
Surrounding red perimeter
Central puncture
Appears "target" lesions

30

Diagnosis of Black Widow Spider Bite

S/S with Hx
Leukocytosis
Elevated creatinine, liver enzymes
EKGs (cardiac risk)
Cardiac enzymes (cardiac risk)