B737 flight attendant reported the crew and passengers were unknowingly exposed to pesticide spray i...

Narrative:

Four flight attendants boarded the aircraft. There was an extremely thick fog throughout the cabin. It was as heavy as smoke. It was difficult to see the other two flight attendants at the opposite end of the aircraft. After determining that the thick fog was not smoke; we concluded that the cause of the thick fog was due to condensation. The weather in den was very hot (90 degree range). Passengers boarded 10 minutes after us and were also exposed to inhalation of the thick fog. The pilots arrived about 15-20 minutes after passenger boarding. It was determined that the thick fog was pesticide spray. Our aircraft came in from cancun and was treated [here]. My contact lenses had a permanent heavy film on them and my voice became very weak and scratchy. I continued to taste and smell the pesticide spray in my sinuses and mouth for several days; in addition to nausea. Please tell us what we were exposed to.

Original NASA ASRS Text

Title: B737 Flight Attendant reported the crew and passengers were unknowingly exposed to pesticide spray in the form of a heavy fog when they boarded the aircraft.

Narrative: Four Flight Attendants boarded the aircraft. There was an extremely thick fog throughout the cabin. It was as heavy as smoke. It was difficult to see the other two Flight Attendants at the opposite end of the aircraft. After determining that the thick fog was NOT smoke; we concluded that the cause of the thick fog was due to condensation. The weather in DEN was very hot (90 degree range). Passengers boarded 10 minutes after us and were also exposed to inhalation of the thick fog. The Pilots arrived about 15-20 minutes after passenger boarding. It was determined that the thick fog was pesticide spray. Our aircraft came in from Cancun and was treated [here]. My contact lenses had a permanent heavy film on them and my voice became very weak and scratchy. I continued to taste and smell the pesticide spray in my sinuses and mouth for several days; in addition to nausea. Please tell us what we were exposed to.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1374340
Time
Date	201607
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Flight Attendant (On Duty)
Qualification	Flight Attendant Current
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

B737 flight attendant reported the crew and passengers were unknowingly exposed to pesticide spray in the form of a heavy fog when they boarded the aircraft.