Table 3.

Identified sources of the BCC outbreaks

Environmental source	9 (8.1%)
Medical device	19 (17.1%)
Medical preparation (including solutions, drugs, disinfectants)	66 (53.2%)
–Contaminated disinfection products	15 (12%)
•Contaminated chlorhexidine	8 (6.5%)
•Contaminated benzalkonium chloride	3 (2.4%)
–Contaminated respiratory care products	11 (8.9%)
•Contaminated albuterol	5 (4%)
–Contaminated alcohol-free mouthwash	6 (4.8%)
Intrinsically contaminated products	35 (28.2%)
Extrinsically contaminated products	55 (44.4%)
Unknown if intrinsically or extrinsically contaminated product	34 (27.4%)