Chlamydia

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Chlamydia

 [klah-mid´e-ah]
a widespread genus of gram-negative, nonmotile bacteria. They are obligate intracellular parasites that are totally dependent on the host cell for energy in the form of adenosine triphosphate (ATP), which they cannot synthesize. Outside a host they exist as elementary bodies that have a rigid cell wall and are unable to grow and divide. The elementary bodies attach to the host cells and are taken in by phagocytosis. Inside the phagosome they become reticulate bodies that have flexible cell walls and are able to grow and divide. Subsequent release of elementary bodies and lysis of the host cell permit infection of surrounding cells.

The genus Chlamydia contains two species, C. tracho´matis and C. psit´taci. C. trachomatis can cause trachoma, inclusion conjunctivitis, lymphogranuloma venereum, nongonococcal urethritis, and a number of other genital infections. C. psittaci causes psittacosis.

The symptoms of sexually transmitted chlamydial infections may be mild; hence this is sometimes called “the silent STD.” Victims may not be aware they have the disease and may not seek treatment until serious complications and unwitting transmission to other persons have occurred. Males who have symptoms usually have painful urination and a watery discharge from the penis. Women may suffer itching and burning in the genital area, an odorless, thick, yellow-white vaginal discharge, dull abdominal pain, and bleeding between menstrual periods. C. trachomatis causes about half of all pelvic inflammatory disease. Symptoms can appear from a week to five weeks after exposure to the bacteria, during which time almost all sexual contacts become infected.

Chlamydial infection during pregnancy can increase the risk of stillbirth or premature birth. The newborn is at risk for infection from its mother and may suffer from inclusion conjunctivitis. Chlamydial infection can also lead to pneumonia some weeks after birth, probably because of infectious material from the eye draining through the nasolacrimal ducts and being aspirated into the lungs.

Chlamydial infection is usually treated with an antibiotic; effective single antibiotic therapy is available. It is essential that condoms be used during sexual intercourse throughout the treatment period to prevent reinfection, and condom use is usually recommended for 3 to 6 months after treatment. As with all sexually transmitted diseases, both partners should be treated at the same time to prevent reinfection. If left untreated, chlamydial infection can cause scarring in the fallopian tubes and lead to infertility and tubal pregnancies. In the male, nongonococcal urethritis due to chlamydiae may lead to epididymitis and sterility.

The U.S. Preventive Services Task Force has drawn up guidelines that strongly recommend routine screening for Chlamydia infections for all sexually active women ages 25 and younger in order to insure detection. Printed copies of the Guidelines are available online through the National Guideline Clearinghouse at http://www.guideline.gov. They can also be obtained from the AHRQ Publications Clearinghouse by calling 1-800-358-9295.

chlamydia

 [klah-mid´e-ah]
any member of the genus Chlamydia.

Chlamydia

(kla-mid'ē-ă),
One of three genera in the family Chlamydiaceae, Chlamydia muridarum, the cause of pneumonitis; Chlamydia suis; and Chlamydia trachomatis. Chlamydia are obligatory intracellular spheric or ovoid bacteria with a complex intracellular life cycle; the infective form is the elementary body, which penetrates the host cell, replicating as the rediculate body by binary fission; replication occurs in a vacuole called the inclusion body; lack peptidoglycan in cell walls; type species in Chlamydia trachomitis. Formerly called Betsonia.
Synonym(s): Chlamydozoon
[G. chlamys, cloak]

chla·myd·i·a

, pl.

chla·myd·i·ae

(kla-mid'ē-ă, -mid'ē-ē),
A vernacular term used to refer to any member of the genus Chlamydia.

Chlamydia

/Chla·myd·ia/ (klah-mid´e-ah) a genus of the family Chlamydiaceae. Some strains of C. psitta´ci cause psittacosis, ornithosis, and other diseases; various strains of C. tracho´matis cause trachoma, inclusion conjunctivitis, urethritis, proctitis, and lymphogranuloma venereum.

chlamydia

(klə-mĭd′ē-ə)
n. pl. chlamyd·iae (-ē-ē′)
1. Any of various gram-negative, coccoid bacteria of the genus Chlamydia, especially C. psittaci and C. trachomatis, that are pathogenic to humans and other animals, causing infections such as conjunctivitis in cattle and sheep and trachoma, urethritis, and pneumonia in humans.
2. Any of several common, often asymptomatic, sexually transmitted diseases caused by the bacterium Chlamydia trachomatis.

chla·myd′i·al adj.

Chlamydia

[kləmid′ē·ə]
Etymology: Gk, chlamys, cloak
1 a microorganism of the genus Chlamydia.
2 a genus of microorganisms that live as intracellular parasites, have a number of properties in common with gram-negative bacteria, and are currently classified as specialized bacteria. Three species of Chlamydia have been recognized; all are pathogenic to humans. Chlamydia trachomatis, an organism that lives in the conjunctiva of the eye and the epithelium of the urethra and cervix, is responsible for inclusion conjunctivitis and the sexually transmitted diseases lymphogranuloma venereum, pelvic inflammatory disease, and trachoma. C. trachomatis is one of the most common sexually transmitted organisms in North America and a frequent cause of sterility. C. psittaci is an organism that infects birds and causes a type of pneumonia in humans. Chlamydia pneumoniae is the causative organism of Taiwan acute respiratory disease, which is responsible for both upper and lower respiratory tract infections and commonly causes community acquired pneumonias. The incubation period ranges from 3 to 21 days. The diagnosis is made by tissue culture or Gram's stain of endocervical or urethral discharge. Treatment consists of one of the following: doxycycline, azithromycin, erythromycin, or ofloxacin. Considerations for health care providers include encouraging patients to refer for testing any sexual partners of the past 60 days. The health care provider should educate the patient about condom use, medications, and avoidance of sexual intercourse until drug therapy is completed and symptoms are gone. See also psittacosis. chlamydial, adj.

Chla·myd·i·a

(klă-mid'ē-ă)
One of three genera in the family Chlamydiaceae; includes Chlamydia muridarum, the cause of pneumonitis in mice, C. suis, and C. trachomatis, the type species. Chlamydiae are obligatory intracellular spheric or ovoid bacteria with a complex intracellular life cycle; the infective form is the elementary body, which penetrates the host cell, replicating as the reticulate body by binary fission. Replication occurs in a vacuole called the inclusion body. Chlamydiae lack peptidoglycan in their cell walls. Formerly called Bedsonia.

chla·myd·i·a

, pl. chlamydiae (klă-mid'ē-ă, -ē)
A vernacular term used to refer to any member of the bacterial genus Chlamydia.

Chlamydia,

A genus of small, non-motile, GRAM NEGATIVE bacteria that occupy cells and were thus once thought to be viruses. They carry both DNA and RNA and multiply by binary fission. They can be destroyed by tetracycline antibiotics.

Chlamydia

Gram-negative BACTERIA (see GRAM'S STAIN) that are OBLIGATE INTRACELLULAR PARASITES of man and other animals. They can only reproduce (see REPRODUCTION) within a host CELL. They are smaller than some of the largest VIRUSES. They are COCCOID, about 0.2–1.5 μm in size and can be transmitted by interpersonal contact or by respiratory routes. Chlamydia trachomatis causes trachoma, a common cause of blindness in humans.
expected ratioobserved nos (o values)expected nos (E values)(o-e)(o-e)2(o-e)2/e
red 3 82 75 7 49 0.65
white 1 18 25 7 49 1.96
100 100 χ2=2.61

Chlamydia

One of the most common sexually transmitted diseases in the United States. It causes discharge, inflammation and burning during urination. About half of the cases of nongonococcal urethritis are due to chlamydia.

chlamydia (kl·miˑ·dē·),

n an infection caused by the bacterium,
Chlamydia trachomatis that primarily affects the urethra in males and the cervix in females. Typically, the infection does not present any symptoms, but an atypical discharge from the penis or vagina may appear during urination. If not treated, it can worsen and cause pelvic inflammatory disease in females and epididymitis in males. Worldwide, it is the most common sexually transmitted disease. See also epididymitis; disease, pelvic inflammatory; and providone-iodine.

Chla·myd·i·a

(klă-mid'ē-ă)
Obligatory intracellular spheric or ovoid pathogenic bacteria with a complex intracellular life cycle; infective form is the elementary body, which penetrates the host cell, replicating as the rediculate body by binary fission.

Chlamydia

a genus of bacteria in the family Chlamydiaceae previously comprising three species: C. trachomatis, C. pneumoniae and C. psittaci. Following reclassification in 1999, C. psittaci, C. pecorum and C. pneumoniae are now in the genus Chlamydophylia. C. trachomatis remains in the genus Chlamydia, but the mouse and swine strains previously included are now classified in two new species.

Chlamydia muridarum
associated with respiratory tract infections in mice and hamsters. Previously classified as C. psittaci.
Chlamydia psittaci
see C. muridarum, C. suis, Chlamydophila abortus, C. caviae, C. felis, C. pneumoniae, C. pecorum, and C. psittaci.
Chlamydia suis
associated with enteritis, pneumonia and conjunctivitis in pigs. Previously classified as C. psittaci.

chlamydia

pl. chlamydiae; any member of the family Chlamydiaceae.

Patient discussion about Chlamydia

Q. How do I know if I'm infected by chlamydia?

A. i had this a long time ago,i got it when i was stationed over seas,i had painful urinations,had a puss like discharge,and sores on the penis.i always had discharge stains in my underwear.

Q. after takeing a 1g. dose of zithromax how long do u have to wait to have sex for clamydia i havent been diagnosed yet but to be on the safe side they gave me a 1g. z-pack just in case getting tested in two days but i wanted to see a girl this weekend and sleep with a girl should i wait

A. you need to wait till the doctor says its ok,i would wait 30 days just too be safe.

More discussions about Chlamydia