Fig.6.
Sensitivity of HRV-C15 to low pH. HRV-C15 was diluted 1:10 in citrate phosphate buffer (pH=4.5) or left untreated (pH 7.5), and was then used to infect A) sinus organ cultures (n=3) B) differentiated cultures of HSEC (n=3). Similar experiments were conducted with HRV-A16 (C). Virus titers were determined 24 hr after inoculation. *P<0.05, **P<0.004 by t-test.