Subacute inflammation of the inguinal lymph glands caused by certain immunotypes of CHLAMYDIA TRACHOMATIS. It is a sexually transmitted disease in the U.S. but is more widespread in developing countries. It is distinguished from granuloma venereum (see GRANULOMA INGUINALE), which is caused by Calymmatobacterium granulomatis.

INFLAMMATION of the MUCOUS MEMBRANE of the RECTUM, the distal end of the large intestine (INTESTINE, LARGE).

Type species of CHLAMYDIA causing a variety of ocular and urogenital diseases.

Pathological developments in the RECTUM region of the large intestine (INTESTINE, LARGE).

Inflammation of the RECTUM and the distal portion of the COLON.

A genus of the family CHLAMYDIACEAE whose species cause a variety of diseases in vertebrates including humans, mice, and swine. Chlamydia species are gram-negative and produce glycogen. The type species is CHLAMYDIA TRACHOMATIS.

Anogenital ulcers caused by Calymmatobacterium granulomatis as distinguished from lymphogranuloma inguinale (see LYMPHOGRANULOMA VENEREUM) caused by CHLAMYDIA TRACHOMATIS. Diagnosis is made by demonstration of typical intracellular Donovan bodies in crushed-tissue smears.

A lesion on the surface of the skin or a mucous surface, produced by the sloughing of inflammatory necrotic tissue.

A genus of CHLAMYDOPHILA infecting primarily birds. It contains eight known serovars, some of which infect more than one type of host, including humans.

A chronic infection of the CONJUNCTIVA and CORNEA caused by CHLAMYDIA TRACHOMATIS.

Pathological processes involving the male reproductive tract (GENITALIA, MALE).

Sexual attraction or relationship between males.

Pathological processes involving the female reproductive tract (GENITALIA, FEMALE).

Infections with bacteria of the genus CHLAMYDIA.

Infection with CHLAMYDOPHILA PSITTACI (formerly Chlamydia psittaci), transmitted to humans by inhalation of dust-borne contaminated nasal secretions or excreta of infected BIRDS. This infection results in a febrile illness characterized by PNEUMONITIS and systemic manifestations.

Proteins isolated from the outer membrane of Gram-negative bacteria.

Sudden increase in the incidence of a disease. The concept includes EPIDEMICS and PANDEMICS.

Process of determining and distinguishing species of bacteria or viruses based on antigens they share.