Stings, bites, and bugs

Question 1

Dx?

Answer 1

Bed bug bites (linear groups of three)

Question 2

What biochemical process occurred here?

Answer 2

Sphingomyelinase interacted with amyloid A; hyaluronidase allowed spread of the eschar in a gravity-dependent manner

Question 3

Name of organism that caused this?

Answer 3

Pedicularis corporis

Question 4

Dx?

Answer 4

Scabies

Question 5

The causative agent of this condition is found:

Answer 5

In cracks of beds and behind peeling paint

Question 6

Where is this bug found?

Answer 6

Belize

(Botfly larvae)

Question 7

4 drugs to treat this?

Answer 7

1. Malathion
2. Permethrin
3. Lindane
4. Ivermectin

Question 8

Name of the finding here?

Answer 8

Maculae ceruleae

(Blue-brown hemosiderin-laden macules due to hemorrhage from body lice bites)

Question 9

Dx?

Answer 9

Scabies

Question 10

What organism transmitted the disease manifesting here?

Answer 10

Simulium black fly

(SubQ nodule on bony prominence = cutaneous manifestation of river blindness caused by onchocerca vulvus)

Question 11

Name of this organism?

Answer 11

Pediculis capitis

Question 12

Name of this organism?

Answer 12

Phtheriasis pubis

Question 13

Where else might you characteristically find lesions caused by the organism that caused this finding?

Answer 13

Wrists, flexor surfaces of elbows, penis, scrotum, areola, umbilical belt line

(Scabies = INTERDIGITAL WEBS)

Question 14

Pathogenesis?

Answer 14

Tunga penetrans impregnated female lays eggs in skin –> eggs either inhabit lesion or burrow into dermis