OBJECTIVE This study was designed to assess a newly developed toothbrush for efficacy in plaque removal, reduction of gingivitis and soft tissue bleeding, and retardation of stain formation over 30 days. METHODOLOGY Healthy adult subjects (N = 112) were admitted to the study, and randomly given a test toothbrush, (the elmex interX medium) or the control toothbrush, an ADA-Accepted flat-bristl...

The microimmunofluorescence test with hyperimmune rooster sera against lymphogranuloma venereum strains gave the same serotype patterns obtained in the standard mouse serum system. Results in a plaque reduction test appeared similar when only 3 prototype strains were tested, but differed when a battery of 11 strains were tested.

The effect of Aloe vera on the reduction of plaque and gingivitis was evaluated in a randomized, parallel and double-blind clinical trial. Subjects were randomly allocated to the test group (n=15) - dentifrice containing Aloe vera - or the control group (n=15) - fluoridated dentifrice. Plaque index (PI) and gingival bleeding index (GBI) were assessed at days 0 and 30. Subjects were asked to bru...

background and objective:   the aim of the study was to evaluate the clinical effects of a mouthwash containing sage (salvia officinalis) extracts on streptococcus mutans (sm) causing dental plaque in school-aged children. material and methods: a double blind clinical trial study was conducted in a dormitory on 70 girls aged 11-14 years having the same socioeconomic and oral hygiene conditions....

A novel neutralization assay for human group C rotavirus (CHRV) was developed by using a reverse passive hemagglutination (RPHA) test for endpoint determination. In this assay, the neutralization (N)-RPHA test, serial twofold dilutions of sera were mixed with a solution of CHRV that yielded an RPHA test titer of 8 at 3 days after infection. The mixtures were incubated at 37 degrees C for 1 h an...

Primary infection of HEp-2 cells with rubella virus resulted in non-cytophatic long-term persistent infection. During four years of persistence the virus was produced in sufficient quantities (up to 6 logs PFU/ml) and did not differ from the parental variant in its pathogenicity for BHK-21 or RK-13 cells, or hemagglutinating activity, but formed smaller plaques. Persistent virus preserved the o...

Mink lung cells (MvILu) are highly susceptible to varicella-zoster virus (VZV). The titres of cell-free VZV suspensions reached 1.0 x 10(7) p.f.u./ml at 3 days post-infection, with subsequent cell degeneration, if MvILu cells were infected with a multiplicity of infectious virus of 0.01 p.f.u./cell. In contrast, during the same period and under the same conditions the titres of cell-free VZV we...

The assessment of immunogenicity of a diluted vaccinia vaccine for possible widespread use of a diluted vaccine in the event of a bioterrorist attack prompted us to focus on the development of a sensitive and specific plaque reduction neutralization (PRN) assay to assess the antibody response of volunteers to a vaccinia (Dryvax) vaccine. Two incubation times, 1 h or overnight (approximately 15 ...