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Harrison's Principles of Internal Medicine, 17e
| Part Seven: Infectious Diseases > Section 10: Diseases Caused by Rickettsia, Mycoplasma, and Chlamydia > |
Chapter 167. Rickettsial Diseases
Sections: Rickettsial Diseases: Introduction, Tick-, Mite-, Louse-, and Flea-Borne Rickettsioses, Scrub Typhus, Ehrlichioses and Anaplasmosis, Q Fever, Acknowledgment, Further Readings.
Topics Discussed: rickettsia infections.
Excerpt:
"The rickettsiae are a heterogeneous group of small, obligately
intracellular, gram-negative coccobacilli and short bacilli, most
of which are transmitted by a tick, mite, flea, or louse vector.
Except for louse-borne typhus, humans are incidental hosts. Among
rickettsiae, Coxiella burnetii, Rickettsia
prowazekii, and R. typhi have
the well-documented ability to survive for an extended period outside
the reservoir or vector and to be extremely infectious: inhalation
of a single Coxiella microorganism
can cause pneumonia. High infectivity and severe illness after inhalation
make R. prowazekii, R. rickettsii, R. typhi,
R. conorii, and C. burnetii bioterrorism threats...."
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