What part of the face may carry the bigest risk for viral transfer??? is there a scientist in the house who can use this study and answer this question?????
A substantial portion of human respiratory tract infection
is thought to be transmitted via contaminated hand contact
with the mouth, eyes, and/or nostrils. Thus, a key risk factor
for infection transmission should be the rate of hand contact
with these areas termed target facial membranes. A study
was conducted in which 10 subjects were each videotaped
for 3 hr while performing office-type work in isolation from
other persons. The number of contacts to the eyes, nostrils,
and lips was scored during subsequent viewing of the tapes.
The total contacts per subject had sample mean ?x = 47
and sample standard deviation s = 34. The average total
contact rate per hour was 15.7. The authors developed a
relatively simple algebraic model for estimating the dose of
pathogens transferred to target facial membranes during a
defined exposure period. The model considers the rate of
pathogen transfer to the hands via contact with contaminated
environmental surfaces, and the rate of pathogen loss from the
hands due to pathogen die-off and transfer from the hands to
environmental surfaces and to target facial membranes during
touching. The estimation of infection risk due to this dose also
is discussed. A hypothetical but plausible example involving
influenza A virus transmission is presented to illustrate the
model.
http://pdfserve.informaworld.com/271267_751309336_791638792.pdfis thought to be transmitted via contaminated hand contact
with the mouth, eyes, and/or nostrils. Thus, a key risk factor
for infection transmission should be the rate of hand contact
with these areas termed target facial membranes. A study
was conducted in which 10 subjects were each videotaped
for 3 hr while performing office-type work in isolation from
other persons. The number of contacts to the eyes, nostrils,
and lips was scored during subsequent viewing of the tapes.
The total contacts per subject had sample mean ?x = 47
and sample standard deviation s = 34. The average total
contact rate per hour was 15.7. The authors developed a
relatively simple algebraic model for estimating the dose of
pathogens transferred to target facial membranes during a
defined exposure period. The model considers the rate of
pathogen transfer to the hands via contact with contaminated
environmental surfaces, and the rate of pathogen loss from the
hands due to pathogen die-off and transfer from the hands to
environmental surfaces and to target facial membranes during
touching. The estimation of infection risk due to this dose also
is discussed. A hypothetical but plausible example involving
influenza A virus transmission is presented to illustrate the
model.