SUMMARYAdenovirus are important pathogen primarily associated to respiratory infections of children and military personnel, even though it is also associated to cases of conjunctivitis and keratoconjunctivitis. We analyzed respiratory secretion collected from subjects with and without respiratory infection symptoms, being 181 civilians and 221 military subjects. The samples were inoculated in HEp-2 and/or A549 tissue cultures for viral isolation. Samples presenting cytopathogenic effect (CPE) in any tissue culture were tested by a polymerase chain reaction (PCR) assay to confirm adenovirus isolation. The isolates confirmed as adenovirus were further analyzed by restriction endonuclease assay for determination of viral species. Three isolates were identified as specie A (two from civilian and one from military), one isolate from military was identified as specie C, and one isolate from civilian was identified as specie D. For two isolates the specie could not be identified.
KEYWORDS: Adenovirus; Respiratory infections; Epidemiology.Human adenovirus comprises 51 serotypes classified into the genera Mastadenovirus of the Adenoviridae family, and are divided in six species (formerly subgenera) designated from A to F (BENKÖ et al., 1999;DE JONG et al., 1999, HORWITZ, 2001). The adenoviruses were first isolated and characterized as viral agent by two groups who were searching for the etiologic agents of acute respiratory infections (ROWE et al., 1953;HILLEMAN & WERNER, 1954). Besides respiratory diseases, which includes acute respiratory disease of the military recruits, acute febrile pharyngitis, pharingoconjuctival fever, and pneumonia, the adenoviruses have been associated to a variety of clinical syndromes, such as epidemic keratoconjunctivitis, acute hemorrhagic cystitis, hepatitis and gastroenteritis (HORWITZ, 2001). Recently, the detection of adenovirus genome was described in cases of myocarditis (PAUSCHINGER et al., 1999), sudden infant death associated to myocarditis and pericartitis (SHIMIZU et al., 1995), toxic shock-like syndrome (PRICE et al., 2001), and unexplained deaths (PERKINS et al., 1996). Isolation of adenovirus from patients with central nervous system manifestations such of fatal acute flaccid paralysis (CARDOSA et al., 1999) and encephalitis with cerebral edema have also been described (CHATTERJEE et al., 2000).Epidemiologic studies initiated by the Commission of Acute Respiratory Disease of the U.S. Armed Forces confirmed that the adenoviruses were the cause of a large number of respiratory syndromes among military recruits (GINSBERG et al., 1955;DINGLE & LANGMUIR, 1968). Because of crowded living conditions, stressful working environment, and exposure to respiratory pathogens in diseaseendemic areas, military trainees and newly mobilized troops are at particularly high risk for respiratory disease epidemics (GRAY et al., 1994;GAYDOS & GAYDOS, 1995). During the 1950s and 1960s, up to 10% of recruits were infected with adenovirus, and these pathogens were responsible for approximately 90% of ...