round the neck, across the
shoulders, around the waist, and down the outside of the thighs. It is
uncommon in children.

[Illustration: Fig. 81.
Pediculus Corporis x 25. (_After Duhring._) Female. Dorsal surface.]

#State the diagnostic characters of pediculosis corporis.#

The presence of the minute hemorrhagic puncta, the multiform character
and peculiar distribution of the eruption. Careful search will almost
invariably disclose one or more pediculi.

#What is the treatment of pediculosis corporis?#

The clothing and bed-coverings are to be thoroughly baked or boiled, the
pediculi and their ova being in this manner destroyed; a thymol or
carbolized boric-acid lotion may be used to relieve the cutaneous
irritation.

When attention to the wearing apparel is not immediately practicable,
ointments of sulphur and staphisagria, and lotions of carbolic acid, may
be advised as temporary measures. The wearing of a bag of loosely woven
texture containing some lump sulphur next to the skin is useful in such
cases; at the temperature of the body the sulphur undergoes slow
oxidation. In hairy individuals the malady is often persistent, due to
the fact that ova have become attached to the hair and a new progeny
soon hatched out. Continued treatment over a few weeks will usually
suffice to rid the patient of their presence.

#Pediculosis Pubis.#

#Describe the symptoms of pediculosis pubis.#

Pediculosis pubis is a condition due to the presence of the pediculus
pubis, or crab-louse. It is characterized by more or less itching about
the genitalia, together with papules, excoriations, and other
inflammatory lesions. The amount of irritation varies; it may be slight,
or, on the other hand, severe. The parasite, which is the smallest of
the three varieties, may be discovered upon close examination seated
near the roots of the hairs, clutching the hair, with its head downward
and buried in the follicle. The ova may be seen attached to the
hair-shafts.

It infests adults chiefly, being in many instances probably contracted
through sexual intercourse.

#Is the pediculus pubis found upon any other part of the body?#

Yes. Although its favorite habitat is the region of the pubes, it may,
in exceptional instances, also infest the axillae, the sternal region of
the male, the beard, eyebrows, and even the eyelashes.

#State the diagnostic characters of pediculosis pubis.#

The region i