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Biomedical subjects

T Kellogg

Publications and source records attributed to T Kellogg.

3 recordsLinked to original sources

Predictors of human immunodeficiency virus counseling and testing among sexually transmitted disease clinic patients.

OBJECTIVES: To determine the predictors of prior or current, and repeat human immunodeficiency virus (HIV) testing. STUDY DESIGN: Cross-sectional survey. METHODS: Sexually transmitted disease (STD) clinic patients who participated in a blinded HIV seroprevalence survey completed a voluntary questionnaire regarding their reasons for accepting or declining HIV testing. RESULTS: Eighty-seven percent of participants reported a previous HIV test or were HIV testing the day they completed the questionnaire. African Americans were less likely to have been HIV tested (adjusted odds ratio 0.3, 95% confidence limits, 0.1, 0.8). The most common reasons for testing were to be reassured and to receive medical care if infected. The most common reason for not testing was that nontesters did not think that they were infected. Repeated testing was reported by 51% of the participants and was more frequent among patients who were older or members of high-risk groups (P < 0.05). Patients tested repeatedly to confirm a prior HIV test result or because of continued risky behavior. CONCLUSIONS: Testing for HIV is frequent among STD clinic patients but less so among African Americans. Receipt of medical care appears to be an important motivation for HIV testing, whereas lack of perceived risk may discourage testing. Continued high-risk behavior contributes to repeat HIV testing.

AIDS Serodiagnosis

A computational model for electron backscattering in electron dosimetry.

A one-dimensional electron transport algorithm based on the ideas of invariant imbedding has been developed and applied to the problem of electron backscattering in electron dosimetry. Results have been compared with experimental and Monte Carlo results. Agreement appears to be reasonable at low incident energies (0.5 to 10 MeV) and low Z(Z < or = 65) materials.

Electrons

Determination of bile acid pool size, turnover time, and distribution of male broiler chicks during the first 6 weeks posthatch using SEHCAT, a gamma ray-emitting bile acid analogue.

A bile acid analogue, SEHCAT (tauro-23-75SE-selena-homocholic acid), was used to determine bile acid pool size, turnover time, and distribution in the developing broiler chick. Bile acid pool size was significantly affected by age and followed a quintic trend (a fifth degree polynomial). It remained steady until 30 days of age when it decreased significantly and then rose significantly at 37 days of age. The bile acid pool half-life remained constant until 28 days of age when it increased significantly and then held steady until it increased again at 8 wk of age following a quartic trend. The distribution of bile acids was affected by age with the amount in the gizzard, duodenum, cloaca, liver, and gall bladder varying significantly with age. Jejunal, ileal, and cecal bile acids did not vary significantly with age. Liver bile acid levels followed a quintic trend, rising until 23 days of age and dropping sharply at 30 days of age and holding steady.

Animals