Virus leakage through natural membrane condoms.

Area of Science:

• Virology
• Materials Science
• Public Health

Background:

• Condoms made from natural membranes are widely used for disease prevention.
• Previous studies have yielded inconsistent results regarding their efficacy against viral penetration.

Purpose of the Study:

• To quantitatively assess virus leakage through natural membrane condoms.
• To investigate the relationship between the leakage of small and large viruses.

Main Methods:

• Simultaneous use of two viral probes: bacteriophage phi X174 (27 nm) and herpes simplex virus (120-150 nm).
• Condoms were filled with a viral mixture and suspended in a buffered solution.
• Leakage was measured by assaying the surrounding buffer for viral presence.

Main Results:

• Significant leakage of bacteriophage phi X174 was observed in a substantial proportion of condoms tested (10/24 and 13/24 for two brands).
• Leakage varied considerably between individual condoms, even within the same brand.
• Only two condoms that leaked the smaller bacteriophage phi X174 also leaked the larger herpes simplex virus.

Conclusions:

• Natural membrane condoms are permeable to viruses of different sizes.
• There is high variability in viral permeability among individual condoms.
• The leakage of a small virus is not a reliable indicator of larger virus penetration through the same condom.