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Update on the Identification of Coccidioides immitis and Coccidioides posadasii

Rapid Detection using PCR

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August 2012

Coccidioides species are dimorphic fungal pathogens. Coccidioides immitis is endemic to the San Joaquin valley region of California and coccidioidomycosis is sometimes referred to as Valley Fever. Coccidioides posadasii is found in the desert regions of the southwestern United States including Arizona, Utah, New Mexico, and West Texas and also in parts of Mexico, Argentina, Paraguay and Central America. Dr. Wengenack provides an overview of Coccidioides infection and describes transmission, epidemiology, and pathogenesis. She also discusses the laboratory methods that are useful for the detection and identification of Coccidioides species with a particular emphasis on rapid detection using PCR


  • Nancy L Wengenack, PhD, Director of the Mycology and Mycobacteriology Laboratories and Associate Professor of Laboratory Medicine and Pathology in the Division of Clinical Microbiology at Mayo Clinic

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