Exam 24: Chlamydia, Rickettsia and Similar Organisms

A 4-day-old infant shows symptoms of conjunctivitis.A Giemsa stain of the conjunctival scraping shows perinuclear cytoplasmic inclusions.This organism is most likely:

A young man goes to his physician complaining of a discharge from his penis.The physician collects a slide for Gram stain and a swab for culture and sends them to the laboratory.The Gram stain is prepared and read: greater than 25 wbc/hpf, no bacteria seen.The culture results after 48 hours show no growth.What is the most probable diagnosis and the organism responsible?

What organisms are considered obligate intracellular parasites?

Guidelines for testing and reporting the results of Chlamydia trachomatis testing on patients include all the following except:

Chlamydia trachomatis is the infectious agent in all the following conditions in humans except:

What organism causes endemic typhus?

What organism causes Rocky Mountain spotted fever?

What disease does Chlamydophila psittaci cause in humans?

What organism has been established as a risk factor for Guillain-Barré syndrome?

What organism causes human monocytic ehrlichiosis and uses the lone star tick (Amblyomma americanum) as its primary vector?

Diseases caused by rickettsial organisms are typically transmitted to man by:

Chlamydia trachomatis produces all the following conditions in adult women except:

Fifty years after his release from a concentration camp, a man develop signs and symptoms of typhus.He has no known contacts or source of disease exposure at this time; however, he may have had it in 1945.What is the most likely current diagnosis?

Infants can contract all the following chlamydial infections when passing through the birth canal except:

What method is used to confirm a positive Chlamydia trachomatis enzyme immunoassay (EIA)?

All of the following are urogenital infections in men, produced by Chlamydia trachomatis except:

What organism causes epidemic louse-borne typhus?

Why are antibody detection methods for Chlamydia trachomatis infection severely limited in the knowledge they provide the physician?

All of the following diseases are associated with Chlamydia trachomatis except:

What has an outer membrane similar to that of many gram-negative bacteria, with the most prominent feature being the major outer membrane protein?