Volume 26, Number 8—August 2020
Spread of Multidrug-Resistant Bacteria by Moth Flies from Hospital Waste Water System
|No.||Psychodidae larvae/eggs||Count†||Type of room (comment)||Floor‡|
|1||Adult||1||Sewage line service opening (under OR 1)||−4|
|2||Larvae and eggs||>100||Sewage line service opening (200 m distant from OR 1)||−4|
|4||Adult||>500||Washroom, OR 7||−3|
|5||Adult||>50||Corridor, OR 7||−3|
|6||Adult||>50||Supply rooms for OR 7||−3|
|7||Adult||3||Corridor connecting ORs 1–6||−3|
|8||Adult||1||Corridor to ICU 58||−3|
|10||Adult||>5||Doctor’s room (A3–43) St 35||−3|
|12||Adult||>10||OR dermatology (B3–61)||−3|
|13||Adult||>500||Washing room G3–62||−3|
|15||Adult||>5||Supply room (A3–41)||−3|
|16||Adult and eggs||>500 (>100 eggs)||Shower (F3–07) St 35||−3|
|17||Adult||>500||Shower floor 35 (F3–31), patient room and corridor||−3|
|18||Adult||>10||Bathroom floor 34 (E3–07)||−3|
|19||Adult||>10||Shower floor 34 (E3–08)||−3|
|20||Adult||>10||Clean supply room floor 34 (E3–01)||−3|
|21||Adult||>10||Kitchen floor 34 (E3–02)||−3|
|22||Adult||>10||Staff room floor 34 (E3–04)||−3|
|23||Adult||>10||Doctor‘s room floor 34 (E3–05)||−3|
|24||Adult||>5||ICU floor 58 W3001||−3|
|25||Adult||3||OR 12 heart surgery¶||−3|
|26||Adult||>500||Sluice to hospital kitchen (S2–20)||−2|
|27||Adult||>500||Hospital kitchen toilets (S2–20a, b)||−2|
|28||Adult||>10||Supply room emergency department (R1–52)||−1|
|29||Adult||>10||Kitchen emergency department (R1–57)||−1|
|30||Adult||>10||Toilet emergency department (R1–55)||−1|
|31||Adult||>10||Patient rooms emergency department||−1|
Patient numbers correspond to the numbers in Table 2 and Figure 1, panel C. ICU, intensive care unit; OR, operating room; St, suite.
†Count of Psychodidae larvae and adult flies during June 2016–October 2018.
‡Floor numbers are negative because the hospital is in part built on a hill so that Floor 0 is the most top level (Floor 0 had no moth fly observations).
§OR 7 had been closed for years until we eliminated the source of moth flies.
¶In OR 12 only 1 moth fly was found even after an intense search. From all immediately reported occasions 1–2 moth flies were caught and analyzed microbiologically (see Table 2 for results).
1These authors were co–principal investigators.