Date Published: 17 January 2011

Acute respiratory infection warning for bus and tram users

Health News from the United Kingdom (UK).

You are six times more likely to end up at a medical centre with an acute respiratory infection (ARI) if you have recently used a bus or tram ? though those who use buses or trams daily might well be somewhat protected compared with more occasional users.

These are the findings of a study carried out by experts at The University of Nottingham into the relationship between public transport and the risk of catching an acute respiratory infection. Their findings have been published in the online Journal BMC Infectious Diseases.

Jonathan Van Tam, Professor of Health Protection in the School of Community Health Science at Nottingham University (England, UK) and Director of the Health Protection Research Group said:

This is a small exploratory study whose findings require confirmation by a larger study. However, the findings justify the need to practice good respiratory and hand hygiene when using public transport during periods when winter viruses are circulating and where possible to avoid situations where you might spread your germs to others when you have a respiratory illness."

The relationship between public transport use and acquisition of acute respiratory infection is not well understood but potentially important during epidemics and pandemics.

The research, funded by the Health Protection Agency, showed that recent bus or tram use within five days of symptom onset was associated with an almost six-fold increased risk of going to the doctors for acute respiratory infection.

The case-control study, by University of Nottingham medical student Joy Troko, was carried out during the 2008/2009 influenza season. The study ran during a local flu outbreak between December 2 2008 (week 49) and January 15 2009 (week two) which peaked in week 51.

One hundred and thirty eight patients (72 cases of acute respiratory infection and 66 control patients) from a Nottingham GP practice were asked to fill in a questionnaire on bus or tram usages in the five days preceding the onset of their illness or the five days before consultation.

Professor Van Tam said:

We found a statistically significant association between acute respiratory infection and bus or tram use in the five days before symptom onset. The risk appeared greatest among occasional bus or tram users. These data are very plausible when we think about the greater likelihood of developing protective antibodies to common respiratory viruses if repeatedly exposed. The findings have differing implications for the control of seasonal acute respiratory infections and for pandemic influenza. In the latter case we don't have an opportunity to build up any immunity beforehand because it's, by definition, a new virus.?

 

The full study is available online at: http://www.biomedcentral.com/1471-2334/11/16


Source: Nottingham University, England - from Press Release.

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