Comparative study of spermatozoa detection using the genital swab versus bedside smear slide technique in sexual assault patients

Journal of Forensic and Legal Medicine
Sakda SathirareuangchaiSaowarat Petchpunya

Abstract

Specimen collection from sexual assault victims is an essential part of practice in forensic medicine. Semen analysis is a forensic test used to confirm sexual contact. Two methods of specimen collection were compared in this study: the genital swab and bedside slide smear. A retrospective chart review was performed in the Division of Clinical Forensic Medicine, Siriraj Hospital, Thailand. Data were collected on microscopic spermatozoa detection in the external and internal genitalia, the time interval from assault to visit, and the history of condom use and genital cleansing. McNemar's test was used for comparison between the genital swab and bedside slide smear techniques. In total, 724 case files from 2009 to 2013 were reviewed. The genital swab technique yielded a higher detection rate than did the bedside slide smear technique in both the external genitalia (37.0% vs. 31.8%, respectively) and internal genitalia (40.8% vs. 34.1%, respectively). Collection of a genital swab only missed positive cases in 4%-6% of negative swabs. When considering both the external and internal genitalia, the genital swab still yielded a higher rate of positive results than did the slide smear (45.9% vs. 39.0%, respectively). Examination of the...Continue Reading

References

Jun 2, 2007·BMJ : British Medical Journal·Jan Welch, Fiona Mason
Sep 5, 2008·Forensic Science International : Synergy·Ole Ingemann-HansenAnnie Vesterbye Charles
Feb 26, 2010·International Journal of Legal Medicine·Stefanie JänischAnette Solveig Debertin
Jul 29, 2011·Acta Obstetricia Et Gynecologica Scandinavica·Cecilie T HagemannBerit Schei
Oct 6, 2011·Journal of Child Sexual Abuse·Cindy W Christian

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