The effect of temperature and UV light on infectivity of avian influenza virus

[Mingus]

http://www.ncbi.nlm.nih.gov/entrez/..._uids=16771220&query_hl=3&itool=pubmed_docsum

1: Southeast Asian J Trop Med Public Health. 2006 Jan;37(1):102-5. Related Articles, Links

The effect of temperature and UV light on infectivity of avian influenza virus (H5N1, Thai field strain) in chicken fecal manure.

Chumpolbanchorn K, Suemanotham N, Siripara N, Puyati B, Chaichoune K.

Faculty of Veterinary Science, Mahidol University, Nakhon Pathom, Thailand. tekcp@mahidol.ac.th

Normal chicken fecal manure (pH 8.23 and 13.7% moisture) was investigated for infectivity of the avian influenza virus (AIV; H5N1). The manure was divided into three groups; each group was inoculated with AIV at 2.38 x 10(5.25) ELD50. After viral inoculation, the first group was incubated at 25 degrees C. The second group was kept at 40 degrees C, and the last group was exposed to ultraviolet light at 4-5 microw/cm2 at room temperature. After incubation, a 20% suspension of manure was filtered and the filtrates were inoculated into 9-11 day-old embryonated chicken eggs per WHO protocol (2002). The results showed that at 25 degrees C the virus lost its infectivity within 24 hours, and at 40 degrees C within 15 minutes. UV light, however, could not destroy the infectivity of the virus even after exposure for 4 hours.

PMID: 16771220 [PubMed - in process]

 

[Mingus]

Re: The effect of temperature and UV light on infectivity of avian influenza virus

UV hardly destroy the virus in manure...

very, very surprinsing.

 

[Sally Furniss]

Re: The effect of temperature and UV light on infectivity of avian influenza virus

Does uv usually penetrate manure?

 

[gsgs]

Re: The effect of temperature and UV light on infectivity of avian influenza virus

Influenza Viruses survive on non-porous surfaces such as steel and plastic
for up to 24-48 hours and on cloth,paper,tissue for up to 8-12 hours
Viable viruses can be transmitted from non-porous surfaces to hands
for 24 hours and from tissue to hands for 15 minutes

H5N1 survives in feces for >35d at 4C and >6d at 37C
birds excrete virus for >10d orally and in feces
influenza on hands for <5min

H5N1 survives 4d at 22C in water
30d at 9C
2-3d sunlight
bleach for 2min
alcohol
60C for 30min
56C for 3h

90F 3h
100F 3min
82C 7min
165F
180F=82C CDC

25C : 24h in manure
40C : 15 min in manure



F=9/5*C+32

 

[gsgs]

Re: The effect of temperature and UV light on infectivity of avian influenza virus

the lamps can kill viruses in air or water.
But I think filtering the air , heating the water is the
better method.

 

[Jonesie]

Re: The effect of temperature and UV light on infectivity of avian influenza virus

I saw a unit similar to this being sold at Home Depot. It installs in the furnace ducts and kills airborn viruses and bacteria:

http://www.airpalspectra.com/Installation.asp

It cost between $150-$250.

 

[gsgs]

Re: The effect of temperature and UV light on infectivity of avian influenza virus

as I said, I think you can always clean more air and cheaper by filtering.