Volume 18, Number 4—April 2012
Cosavirus Infection in Persons with and without Gastroenteritis, Brazil
|Cohort no.||Cohort description†||Sampling site‡||Sampling time||Participant age, mo, mean (SD)||No. participants||No. (%) RT-PCR positive§||Virus concentration, log10 RNA copies/g feces, mean (SD)¶|
|1||HIV-infected adults with gastroenteritis||Infectious Diseases HIV Outpatient Department||2007 Mar–2010 Mar||487.6 (114.4)||105||1 (1.0)||4.43|
|2||HIV-infected adults without gastroenteritis||2007 Mar–2010 Mar||533.8 (115.9)||49||0||–|
|3||Children with gastroenteritis||Department of Pediatrics Metabolic Unit#||2006 Feb–2007 Sep||19.0 (15.6)||359||13 (3.6)||3.40 (0.93)|
|4||Control children without gastroenteritis||Community child-care center**||2008 Dec||29.6 (13.1)||132||65 (49.2)||2.97 (0.97)|
|5||Control children without gastroenteritis||Community child-care center**||2011 Nov–2011 Dec||14.3 (5.5)||62||4 (6.5)||3.41 (0.49)|
|6||Control children without gastroenteritis||University child-care center**||2011 Oct–2011 Nov||18.6 (4.2)||10||0||–|
*RT-PCR, reverse transcription PCR; –, no virus obtained.
†Gastroenteritis was defined as acute diarrhea with >3 watery stools in the previous 24 h and within 13 d before hospital admission.
‡All hospital units were located within the Hospital Professor Edgard Santos, Federal University of Bahia. All sites were located in Salvador, Bahia, in northeastern Brazil.
§Samples only considered if positive in nested RT-PCR as in (3) and in strain-specific real-time RT-PCR.
¶Measured by strain-specific RT-PCR.
#Reports of diarrhea in the preceding 2 wk served as an exclusion factor.
**Written consent was obtained from adult family members.
1These authors contributed equally to this article.