title: HSV-1 DNA in tears and saliva of normal adults.
abstract: OBJECTIVE
  To assess the frequency of shedding of herpes simplex virus type 1 (HSV-1) DNA in tears and saliva of asymptomatic individuals.
  
  
  METHODS
  Fifty subjects without signs of ocular herpetic disease participated. Serum samples from all subjects were tested for HSV IgG antibodies by enzyme-linked immunosorbent assay (ELISA) and for HSV-1 by neutralization assay. HSV-1 DNA copy number and frequency of shedding were determined by real-time polymerase chain reaction (PCR) analysis of tear and saliva samples collected twice daily for 30 consecutive days.
  
  
  RESULTS
  Thirty-seven (74%) of the 50 subjects were positive for HSV IgG by ELISA. The percentages of positive eye and mouth swabs were approximately equivalent: 33.5% (941/2806) and 37.5% (1020/2723), respectively. However, the percentage of samples with high HSV-1 genome copy numbers was greater in saliva than in tears, which may have been a result of the sample volume collected. Shedding frequency in tears was nearly the same in men (347/1003; 34.6%) and women (594/1705; 34.8%); in saliva, men had a higher frequency of shedding (457/1009; 45.3% vs. 563/1703; 33.1%, men versus women). Overall, 49 (98%) of 50 subjects shed HSV-1 DNA at least once during the course of the 30-day study.
  
  
  CONCLUSIONS
  The percentage of asymptomatic subjects who intermittently shed HSV-1 DNA in tears or saliva was higher than the percentage of subjects with positive ELISA or neutralization antibodies to HSV. Because most HSV transmission occurs during asymptomatic shedding, further knowledge of the prevalence of HSV-1 DNA in tears and saliva is warranted to control its spread. Shedding is simple to study, and its suppression may be an efficient way to evaluate new antivirals in humans.
authors.affiliation: Department of Ophthalmology, LSU Eye Center, New Orleans, LA 70112, USA. hkaufm@lsuhsc.edu
authors.forename: Herbert E
authors.initials: HE
authors.lastname: Kaufman
authors.forename: Ann M
authors.initials: AM
authors.lastname: Azcuy
authors.forename: Emily D
authors.initials: ED
authors.lastname: Varnell
authors.forename: Gregory D
authors.initials: GD
authors.lastname: Sloop
authors.forename: Hilary W
authors.initials: HW
authors.lastname: Thompson
authors.forename: James M
authors.initials: JM
authors.lastname: Hill
mesh_terms: D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000097:blood; D004279:DNA, Viral / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D018628:Gene Dosage; D018259:Herpesvirus 1, Human / Q000235:genetics / Q000276:immunology / Q000302:isolation & purification*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008297:Male; D008875:Middle Aged; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012463:Saliva / Q000821:virology*; D013666:Tears / Q000821:virology*; D017201:Virus Shedding / Q000502:physiology*
chemical_list: D000914:Antibodies, Viral; D004279:DNA, Viral; D007074:Immunoglobulin G