Community spread of legionella pneumophila serogroup 1 in temporal relation to a nosocomial outbreak
2001 (English)In: Scandinavian Journal of Infectious Diseases, ISSN 0036-5548, Vol. 33, no 3, 194-199 p.Article in journal (Refereed) Published
To clarify whether a nosocomial outbreak of legionnaires' disease in the Värnamo hospital in Sweden was part of a wider outbreak in the Värnamo community a number of investigations were performed. First, the proportion of cases of legionnaires' disease in a group with nosocomially acquired pneumonia (11%) was compared to the proportion within a group with community-acquired pneumonia (14%) and the difference was found not to be significant (p>0.05). Second, the proportion of the nursing staff at the Värnamo hospital with an elevated antibody titre (≥ 16) to Legionella pneumophila serogroup (sg) 1 (33%, 84/258) was compared to the proportion in a group of local residents of Värnamo community (26%, 25/96) and found not to be significant; in contrast, comparison with the proportion in a group from the assistant nursing staff at another hospital 60 km away (5%, 4/80) was highly significant (p<0.001). Furthermore, Legionella species were cultured from samples drawn from the hospital water supply as well from the water supply from municipal buildings. In 1996 a follow-up study was conducted, which showed that <1% of the assistant nurses and local residents had an elevated titre to L. pneumophila sg 1. These results indicate that there was a temporary spread of L. pneumophila sg 1 in the Värnamo community at the beginning of 1991, both in the local hospital and the surrounding community. This implies that physicians should be aware of community-acquired cases of legionnaires' disease when a nosocomial outbreak is detected.
Place, publisher, year, edition, pages
2001. Vol. 33, no 3, 194-199 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-25879DOI: 10.1080/00365540151060824Local ID: 10316OAI: oai:DiVA.org:liu-25879DiVA: diva2:246427