- Use of Sno Strip filter-paper wicks for collection of genital-tract samples allows reproducible determination of human immunodeficiency virus type 1 (HIV-1) RNA viral load with a commercial HIV-1 viral load assay. Sherlock, C.H., Lott, P.M., Money, D.M., Merrick, L., Arikan, Y., Remple, V.P., Craib, K., Burdge, D.R. J. Clin. Microbiol. (2006)