Mapping the Anatomy of Respiratory Syncytial Virus Infection of the Upper Airways in Chinchillas (Chinchilla lanigera)
Abstract:Although most viral infections of the upper respiratory tract can predispose to bacterial otitis media, human respiratory syncytial virus (HRSV) is the predominant viral copathogen of this highly prevalent pediatric polymicrobial disease. Rigorous study of the specific mechanisms by which HRSV predisposes to otitis media has been hindered by lack of a relevant animal model. We recently reported that the chinchilla, the preferred rodent host for studying otitis media, is semipermissive for upper-airway HRSV infection. In the current study, we defined the anatomy and kinetics of HRSV infection and spread in the upper airway of chinchilla hosts. Chinchillas were challenged intranasally with a fluorescent-protein–expressing HRSV. Upper-airway tissues were recovered at multiple time points after viral challenge and examined by confocal microscopy and immunohistochemistry. HRSV replication was observed from the rostral- to caudalmost regions of the nasal cavity as well as throughout the Eustachian tube in a time-dependent manner. Although fluorescence was not observed and virus was not detected in nasopharyngeal lavage fluids 14 d after infection, the latest time point examined in this study, occasional clusters of immunopositive cells were present, suggesting that the nasal cavity may serve as a reservoir for HRSV. These data provide important new information concerning the time course of HRSV infection of the uppermost airway and suggest that chinchillas may be useful for modeling the HRSV-induced changes that predispose to secondary bacterial infection.
Document Type: Research Article
Affiliations: 1: Center for Microbial Pathogenesis, Department of Pediatrics, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 2: Center for Microbial Pathogenesis, Department of Pediatrics, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 3: Center for Vaccines and Immunity, Department of Pediatrics, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 4: Center for Microbial Pathogenesis, Department of Pediatrics, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio. Lauren.Bakaletz@nationwidechildrens.org
Publication date: June 1, 2010
Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.
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