Skip to main content

Table 2 Effects of formaldehyde and glutaraldehyde on infectivity of HCVcc in human serum

From: Thermal stability and inactivation of hepatitis C virus grown in cell culture

Treatment

Infectious titer

(FFU/ml)

IFA result

  

2nd cell passage

3rd cell passage

Formaldehyde (0.037%)

   

   0 h

(8.5 ± 0.7) × 104a

NTb

NT

   1.0 h

(1.9 ± 0.4) × 104

NT

NT

   2.0 h

(3.5 ± 0.7) × 103

NT

NT

   3.0 h

(1.0 ± 0.0) × 103

NT

NT

   4.0 h

< 1.0 × 103

negative

negative

Glutaraldehyde (0.01%)

   

   0 min

(9.5 ± 0.7) × 104a

NT

NT

   10 min

(1.8 ± 0.2) × 104

NT

NT

   20 min

(2.5 ± 0.7) × 103

NT

NT

   30 min

< 1.0 × 103

Positive

NT

   40 min

< 1.0 × 103

negative

negative

  1. a Untreated viral samples were retitrated in culture medium containing 0.00037% formaldehyde or 0.0001% glutaraldehyde as controls.
  2. b NT, not tested. Samples with positive results in FFU assay or at the second cell passage were not tested for NS3 staining for the third cell passage.