INTRODUCTION

MATERIALS AND METHODS
1. 현황
2. 역학조사와 초기 대응(2019.6-9월)
Table 1
Date of exam | Inspector | Subject | No. specimen (positive/total) | Type of positive specimen | Culture report (CFU/L) | Temp. (℃) | FRC (mg/L) | Location of positive specimen |
---|---|---|---|---|---|---|---|---|
19.06.25 | PHC |
Cooling tower Building 1 |
1/2 4/12 |
Cooling water Hot water |
2,600 400-13,400 |
Washstand, shower in patient’s room | ||
19.07.15 | Self |
Building 1 Building 2 Faculty office |
0/10 2/12 1/1 |
Hot water Hot water |
50-100 4,400 |
49.1 58.8 |
<1.0 <1.0 |
Washstand, shower in patients’ room* Washstand in faculty office |
19.07.31 | Self | Building 1-2 | 0/15 | |||||
19.08.06-28 | PHC |
Building 1 Building 2 Cooling tower |
0/5 0/6 0/2 |
|||||
19.09.10-18 | Self |
Building 2 Building 1 |
1/8 1/2 |
Hot water Hot water |
50 150 |
56.7 55.6 |
<1.0 <1.0 |
Washstand in nurses’ station† Bedside washstand in MICU† |
19.09.25 | Self |
Building 2 Building 1 |
0/28 0/6 |
|||||
19.09.30 | PHC |
Cooling tower Building 1-2 |
1/2 0/18 |
Cooling water | 8,000 | |||
19.10.21 | Self |
Cooling tower Water tank |
1/2 0/1 |
Cooling water | 800 |
![]() | Fig. 1Timeline of nosocomial legionellosis outbreak with initial countermeasures. Circles are the spots where legionella grew from supplied water. Numbers in circle indicate the order of culture where legionella was identified. Black circles are both patients of legionellosis stayed and supplied water had been contaminated by legionella. |
3. 이산화염소 투입 시스템의 도입(2019.10-)

RESULTS
1. 초기대응 조치와 환경배양검사
2. 원내 레지오넬라 폐렴 유행
Table 2
No. case | Sex/age | Underlying illness | Latest hospital admission | Location of admission | Date of diagnosis | Diagnostic examination | Clinical manifestation | Prognosis |
---|---|---|---|---|---|---|---|---|
1* | F/70 | Peripheral T-cell lymphoma | 19.07.07-09 | Building 2 | 19.07.12 | Urinary legionella antigen | Legionnaire’s disease | resolved |
2 | M/61 | Multiple myeloma | 19.06.26 | Building 2 | 19.08.06 | Urinary legionella antigen | Legionnaire’s disease | resolved |
3* | M/58 | SCLC | 19.08.24-30 | Building 2 | 19.09.08 | Urinary legionella antigen | Legionnaire’s disease | death |
*Cases defined as ‘nosocomial legionellosis’ according to Guidelines for the management of legionellosis 2019 by Korea Disease Control and Prevention Agency (https://www.kdca.go.kr/filepath/boardDownload.es?bid=0019&list_no=364566&seq=1).
3. 후기 대응 조치와 결과
Table 3

DISCUSSION
