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Previous Volume 353:626-627 August 11, 2005 Number 6 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: Extensive cross-reactivity exists among antigens of various spotted-fever–group rickettsiae, and routine serologic assays are generally insufficient to identify conclusively the specific rickettsial agent responsible for the infection. Since 1989 one of us (Dr. Raoult) has investigated the reactivity of serum specimens from patients with various rickettsioses to define the serologic criteria for several of these infections in the Eastern Hemisphere.^1,2 Rickettsia parkeri, a spotted-fever–group rickettsia first identified in 1939 in Gulf Coast ticks (Amblyomma maculatum) collected from Texas, has only recently been shown to be a cause of the disease in the United States.³ Herein . . . [Full Text of this Article]

This article has been cited by other articles:

• PADDOCK, C. D. (2005). Rickettsia parkeri as a Paradigm for Multiple Causes of Tick-Borne Spotted Fever in the Western Hemisphere. Ann. N. Y. Acad. Sci. 1063: 315-326 [Abstract] [Full Text]  
• Parola, P., Paddock, C. D., Raoult, D. (2005). Tick-Borne Rickettsioses around the World: Emerging Diseases Challenging Old Concepts. Clin. Microbiol. Rev. 18: 719-756 [Abstract] [Full Text]