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Influenza B virus outbreak at a religious residential school for boys in Northern Bangladesh, 2011

View Article: PubMed Central - PubMed

ABSTRACT

Background: National media reported a febrile illness among dormitory residents of a boys' religious school. We investigated the outbreak to identify cause.

Methods: Individuals with fever (>100°F) and cough or sore throat between 1 and 13 August 2011 were influenza‐like‐illness (ILI) case‐patients. We collected histories and specimens from hospitalized case‐patients and visited campus to explore environmental context.

Results: All 28 case‐patients were dormitory residents including 27 hospitalizations. Accommodation space per resident was <0.8 square metres. Nasal and oropharyngeal swabs from 22 case‐patients were positive for influenza B virus using real‐time reverse transcription polymerase chain reaction (rRT‐PCR).

Conclusions: Overcrowding likely facilitated transmission leading to this dormitory outbreak.

No MeSH data available.


Related in: MedlinePlus

Date of onset of illness of case‐patients in the religious residential school for boys, Akkelpur subdistrict of Joypurhat District, Bangladesh, 1–13 August 2011 (n=28)
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irv12430-fig-0001: Date of onset of illness of case‐patients in the religious residential school for boys, Akkelpur subdistrict of Joypurhat District, Bangladesh, 1–13 August 2011 (n=28)

Mentions: All 28 case‐patients were dormitory residents. Among these, 27 were hospitalized. The index case‐patient, a 16‐year‐old residential student, developed low‐grade fever, headache, mild cough and runny nose at 5:00 pm on 4 August. He was not hospitalized and recovered on 8 August 2011. Two students developed ILI on 7 August and 25 reported onset on 9 August 2011 (Fig. 1). The outbreak peaked during the first week of Ramadan, when Bangladeshi Muslims were fasting during daylight hours. The attack rate in school was 32% (28/88). Attack rates varied significantly between dormitory vs non‐dormitory students (28/59, 47% vs 0/29, 0%; P=0).


Influenza B virus outbreak at a religious residential school for boys in Northern Bangladesh, 2011
Date of onset of illness of case‐patients in the religious residential school for boys, Akkelpur subdistrict of Joypurhat District, Bangladesh, 1–13 August 2011 (n=28)
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304566&req=5

irv12430-fig-0001: Date of onset of illness of case‐patients in the religious residential school for boys, Akkelpur subdistrict of Joypurhat District, Bangladesh, 1–13 August 2011 (n=28)
Mentions: All 28 case‐patients were dormitory residents. Among these, 27 were hospitalized. The index case‐patient, a 16‐year‐old residential student, developed low‐grade fever, headache, mild cough and runny nose at 5:00 pm on 4 August. He was not hospitalized and recovered on 8 August 2011. Two students developed ILI on 7 August and 25 reported onset on 9 August 2011 (Fig. 1). The outbreak peaked during the first week of Ramadan, when Bangladeshi Muslims were fasting during daylight hours. The attack rate in school was 32% (28/88). Attack rates varied significantly between dormitory vs non‐dormitory students (28/59, 47% vs 0/29, 0%; P=0).

View Article: PubMed Central - PubMed

ABSTRACT

Background: National media reported a febrile illness among dormitory residents of a boys' religious school. We investigated the outbreak to identify cause.

Methods: Individuals with fever (>100°F) and cough or sore throat between 1 and 13 August 2011 were influenza‐like‐illness (ILI) case‐patients. We collected histories and specimens from hospitalized case‐patients and visited campus to explore environmental context.

Results: All 28 case‐patients were dormitory residents including 27 hospitalizations. Accommodation space per resident was <0.8 square metres. Nasal and oropharyngeal swabs from 22 case‐patients were positive for influenza B virus using real‐time reverse transcription polymerase chain reaction (rRT‐PCR).

Conclusions: Overcrowding likely facilitated transmission leading to this dormitory outbreak.

No MeSH data available.


Related in: MedlinePlus