Volume 26, Number 8—August 2020
Dispatch
Spread of Multidrug-Resistant Bacteria by Moth Flies from Hospital Waste Water System
Table 2
No. | Specimens tested | Location found | Species identified† | Can produce biofilm? | Resistance level‡ | Macroscopic/ histologic findings |
---|---|---|---|---|---|---|
1 |
Biofilm |
Sewage line |
Achromobacter xylosoxidans |
Yes |
Not classified |
Biofilm, Candida, mucin, eggs |
2 | Biofilm | Sewage line | Pseudomonas spp. | Yes | Potential XDR§ | Biofilm, cocoons, eggs |
Escherichia coli | MDR | |||||
Lysinibacillus fusiformis |
||||||
3 |
Moth fly |
OR 7 |
Bacillus spp., Citrobacter freundii |
Yes |
MDR |
NA |
4 | Biofilm | Endoscopy of sewage lines in washroom, OR 7 | Advenella species | Yes | Potential XDR§ | Extensive biofilm in all sewage lines, mucin, Candida |
Bacillus spp. | Yes | |||||
Pseudomonas aeuginosa | Yes | |||||
Stenotrophomonas maltophilia | ||||||
Moth fly |
Washroom OR 7 |
Sterile |
NA |
ND |
NA |
|
5 |
Moth fly |
Corridor OR 7 |
P. mosselii
S. maltophilia |
Yes |
Potential XDR§ |
NA |
7 |
Moth fly |
Corridor OR 1-6 |
Bacillus spp.
B. megatariume |
Yes
Yes |
ND |
NA |
8 |
Moth fly |
Corridor ICU CS |
Bacillus spp. |
Yes |
NA |
|
9 | Moth fly | Toilet (A3-40) | S. maltophilia | Potential XDR§ | ||
2 moth flies |
Toilet (A3-40) |
Sterile |
NA |
ND |
NA |
|
10 | Moth fly | Doctors room (A3-43) | Bacillus spp. P. nitroreducens | Yes Yes | ND | NA |
Moth fly |
Doctors room (A3-43) |
B. cereus
B. thuringienses |
Yes
Yes |
ND |
NA |
|
14 |
Moth fly |
Toilet (A3-06) |
Bacillus spp.
B. cereus
Chryseobacterium indologenses |
Yes |
ND |
NA |
16 | Biofilm | Shower drain | B. cereus Bacillus spp. P. putida | Yes | ND | Biofilm, eggs, Candida albicans |
Moth fly | Shower (F3-07) | Bacillus cereus L. sphaericus Staphylococcus epidermidis | Yes | ND | NA | |
2 moth flies |
Shower (F3-07) |
S. maltophilia
B. thuringiensis |
Yes |
Potential XDR |
NA |
|
17 | Moth fly | Shower (F3-31) | Enterococcus faecium (vanA) Bacillus spp. S. maltophilia | Yes | Possible XDR¶ Potential XDR§ | NA |
Moth fly |
Shower (F3-31) |
E. faecium |
Yes |
MDR |
NA |
|
24 | Moth fly | ICU floor C | Sterile | NA | ND | NA |
*Numbers at left are patient numbers, which correspond to the numbers in Table 1 and Figure 1, panel C. CS, cardiosurgery; C, cardiology; ICU, intensive care unit; MDR, multidrug resistant; OR, operating room; NA, not applicable; ND, not detected; XDR, extensively drug resistant.
†Microbiology, histology, and fluorescence in situ hybridization findings in the investigated specimens. Note that not every moth fly from the Table 1 count column was analyzed.
‡Resistance levels defined in Magiorakos et al. (13).
§Potential XDR means that the international standards have not been applied to the bacterium S. maltophilia. Additional details are available in the Appendix.
¶Possible XDR means that it could be XDR but not all antimicrobial categories were tested. Additional details are available in the Appendix.
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1These authors were co–principal investigators.