Ultrafiltration of Simian Viruses ∗

Abstract

Summary

Millipore filters of 100, 50 and 10 mp pore sizes were found to be satisfactory for estimating the size of simian viruses, and classifying them into 3 size categories of large, medium and small. SV₅ was of large size; SV₁, SV₁₁, SV₁₂, SV₁₃, SV₁₇, SV₂₃, SV₂₅, SV₂₇ SV₃₀, SV₃₁, SV₃₂ SV₃₃, and SV₃₆ were in the medium size range; SV₁₆, SV₁₈, War;, SV₂₉, SV₃₅ and SV₄₀ belong to the small virus group. Simplicity of the filter set would permit its use in a routine virus laboratory.