Unwelcome Guest: Airborne Staph in Homes
Staphylococcus aureus, one of the most prevalent causes of infections of the blood, skin, soft tissue, and lower respiratory tract, spreads
through close contact with contaminated people and surfaces. Although a few studies hint that airborne transmission of the microbe may be involved in hospital infections, no studies have examined indoor levels of
S. aureus outside of a hospital setting. The first study to monitor
S. aureus bioaerosols in residences shows that strains of the bacterium are common inhabitants of indoor and outdoor air
[EHP 114:1859–1864; Gandara et al.]. Moreover, indoor strains are particularly resistant to commonly prescribed antibiotics.
Significance of airborne transmission of methicillin-resistant Staphylococcus aureus in an otolaryngology-head and neck surgery unit. - PubMed - NCBI
CONCLUSIONS:
Methicillin-resistant S aureus was recirculated among the patients, the air, and the inamimate environments, especially when there was movement in the rooms. Airborne MRSA may play a role in MRSA colonization in the nasal cavity or in respiratory tract MRSA infections. Measures should be taken to prevent the spread of airborne MRSA to control nosocomial MRSA infection in hospitals.
But, yeah, with e.coli you pretty much have to be in a 'livestock building' in high humidity.
The survival of Escherichia coli in an aerosol at air temperatures of 15 and 30 degrees C and a range of humidities.
The survival of Escherichia coli in an aerosol was studied at several temperatures and over a range of relative humidities using a Henderson apparatus. Death occurred in two phases, the first lasting approximately 1 min; in the second the number of viable microorganisms declined exponentially. E. coli was robust and remained viable for many hours. Death was most rapid at low humidities (less than 50% r.h.) at 15 and 30 degrees C, with half-lives of 14 and 3 min respectively. In humid conditions the half-lives were much longer, approximately 83 and 14 min respectively. Based on this work, preliminary recommendations for the climate of livestock buildings can now be given to control the airborne spread of E. coli.