Legionella longbeachae detected in an industrial cooling tower linked to a legionellosis outbreak, New Zealand, 2015; possible waterborne transmission?

被引：16

作者：

Thornley, C. N. ^{[1
,2
]}

Harte, D. J. ^{[3
]}

Weir, R. P. ^{[1
]}

Allen, L. J. ^{[1
]}

Knightbridge, K. J. ^{[1
]}

Wood, P. R. T. ^{[1
]}

机构：

[1] MidCent Dist Hlth Board, MidCent Publ Hlth Serv, Palmerston North, New Zealand

[2] Hutt Valley Dist Hlth Board, Reg Publ Hlth, Lower Hutt, New Zealand

[3] Inst Environm Sci & Res Ltd, Porirua, New Zealand

来源：

EPIDEMIOLOGY AND INFECTION | 2017年 / 145卷 / 11期

关键词：

Legionnaires' disease; legionella; Legionella longbeachae; occupation-related infections; outbreaks; water-borne infections; SEQUENCE-BASED SCHEME; LEGIONNAIRES-DISEASE; PNEUMOPHILA; STRAINS; SYSTEM; HEALTH; GENE; SOIL;

D O I：

10.1017/S0950268817001170

中图分类号：

R1 [预防医学、卫生学];

学科分类号：

1004 ; 120402 ;

摘要：

A legionellosis outbreak at an industrial site was investigated to identify and control the source. Cases were identified from disease notifications, workplace illness records, and from clinicians. Cases were interviewed for symptoms and risk factors and tested for legionellosis. Implicated environmental sources were sampled and tested for legionella. We identified six cases with Legionnaires' disease and seven with Pontiac fever; all had been exposed to aerosols from the cooling towers on the site. Nine cases had evidence of infection with either Legionella pneumophila serogroup (sg) 1 or Legionella longbeachae sg1; these organisms were also isolated from the cooling towers. There was 100% DNA sequence homology between cooling tower and clinical isolates of L. pneumophila sg1 using sequence-based typing analysis; no clinical L. longbeachae isolates were available to compare with environmental isolates. Routine monitoring of the towers prior to the outbreak failed to detect any legionella. Data from this outbreak indicate that L. pneumophila sg1 transmission occurred from the cooling towers; in addition, L. longbeachae transmission was suggested but remains unproven. L. longbeachae detection in cooling towers has not been previously reported in association with legionellosis outbreaks. Waterborne transmission should not be discounted in investigations for the source of L. longbeachae infection.

引用

页码：2382 / 2389

页数：8