[kluh-mid-ee-uh] /kləˈmɪd i ə/

noun, plural chlamydiae
[kluh-mid-ee-ee] /kləˈmɪd iˌi/ (Show IPA)
Microbiology. any coccoid rickettsia of the genus Chlamydia, parasitic in birds and mammals, including humans, and causing various infections, especially of the eyes, as trachoma, lungs, as psittacosis, and genitourinary tract, as urethritis or chlamydia.
Pathology.. Also called lymphogranuloma venereum. a widespread, often asymptomatic sexually transmitted disease caused by Chlamydia trachomatis, a major cause of nongonococcal urethritis in men and pelvic inflammatory disease and ectopic pregnancy in women.
any Gram-negative bacteria of the genus Chlamydia, which are obligate intracellular parasites and are responsible for such diseases as trachoma, psittacosis, and some sexually transmitted diseases

type of genital infection, 1984, from the name of the bacteria that causes it (1945), which is formed from Latinized comb. form of Greek khlamys (genitive khlamydos) “short mantle, military cloak,” of unknown origin, + -ia.

chlamydia chla·myd·i·a (klə-mĭd’ē-ə)
n. pl. chla·myd·i·ae (-ē-ē’)
Any of several common, often asymptomatic, sexually transmitted diseases caused by the microorganism Chlamydia trachomatis.
chla·myd’i·al adj.

Chlamydia Chla·myd·i·a (klə-mĭd’ē-ə)
A genus of coccoid, gram-negative microorganisms that are pathogenic to humans and animals, causing diseases such as conjunctivitis in cattle and sheep, and trachoma, nonspecific urethritis, and proctitis in humans. Also called Bedsonia, Miyagawanella.
Plural chlamydiae (klə-mĭd’ē-ē’)
Any of various bacteria of the genus Chlamydia, several species of which cause common infections in humans and animals, including neonatal conjunctivitis, pneumonia, bronchitis, pharyngitis, and sexually transmitted infections of the pelvis and urethra.


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  • Chlamydial

    /kləˈmɪdɪəl/ adjective 1. of or relating to infections caused by bacteria of the genus Chlamydia

  • Chlamydia psittaci

    Chlamydia psittaci Chlamydia psit·ta·ci (sĭt’ə-sī’) n. A species of Chlamydia that causes psittacosis in humans and ornithosis, pneumonitis, abortion, encephalomyelitis, and enteritis in various animals.

  • Chlamydia trachomatis

    Chlamydia trachomatis Chlamydia tra·cho·ma·tis (trə-kō’mə-tĭs) n. A species of Chlamydia that causes trachoma, inclusion conjunctivitis, lymphogranuloma venereum, nonspecific urethritis, and proctitis in humans.

  • Chlamydiosis

    chlamydiosis chla·myd·i·o·sis (klə-mĭd’ē-ō’sĭs) n. Any of the diseases that are caused by Chlamydia psittaci and C. trachomatis.

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