Papulopustule

According to Boeck, the hue of the papulopustule is due to minute capillary hæmorrhages, which later become invisible in consequence of the tumefaction of the overlying integument.

The most common of the eruptive symptoms induced are papulopustule lesions usually discrete, rarely confluent, seen on the face, neck, shoulders, and upper extremities.

Accidental inoculation of an abrasion, cut or open follicle of the skin with virus from a dead body may give rise to the rapid production at the site of poisoning of vesico-papule, papulopustule, furuncle, tubercle, wart or hemorrhagic bleb; or there may be little or no local disturbance, with a rapid development of septicæmia or glandular enlargement.

The area is covered with a watchglass held in place by a bandage; in a positive case a papulopustule will develop within 24 to 72 hours, and it will then be easy to demonstrate Ducrey bacilli.

The primary lesion appears to be a papulopustule which affects the follicle.

Pyoderma gangrenosum begins as a small papulopustule that expands to form nodules and plaques.

An old closed comedo has been shattered at various points along the epithelial lining and is now a papulopustule.

It is due to a true diphtheritic infection by Corynbacterium diphtheriae, which commences as a papulopustule; within a few days, the top of the papule becomes necrotic and an ulcer forms and the ulcer slowly enlarges, until it attains a diameter of 1–2 cm.