Ricardo Diaz

Publication Date: 1996

Publication Name: Aids

Research Interests:
Developing Countries, Brazil, Health, Medicine, HIV, and 11 moreBiological Sciences, Population, Humans, Female, Male, AIDS, Retrospective Studies, Amino Acid Sequence, Base Sequence, Acquired immunodeficiency syndrome, and Molecular Sequence Data

To determine temporal trends in HIV infection and risk factors among persons seeking anonymous HIV testing in Santos, Brazil. Data and sera from persons testing for HIV from 1996 to 1999 were used. Exposures were abstracted from HIV... more

To determine temporal trends in HIV infection and risk factors among persons seeking anonymous HIV testing in Santos, Brazil. Data and sera from persons testing for HIV from 1996 to 1999 were used. Exposures were abstracted from HIV testing risk assessments. Stored HIV-positive sera were tested to identify recently acquired HIV infection using a serologic testing algorithm for detecting recent HIV seroconversion (STARHS). Independent associations between exposures and recently acquired HIV infection were determined using multivariate analyses. Overall, estimated HIV incidence was 2.0% (95% CI: 1.1-3.5) for the 4-year period: 1.2% (95% CI: 0.5-2.6) in women and 2.7% (95% CI: 1.3-5.0) in men. Incidence increased among women but remained stable among men. Exposures independently associated with incident infection included a history of sex work (OR= 5.4, 95% CI: 1.5-18.7), concurrent syphilis infection (OR =4.1, 95% CI: 1.4-11.9), anal sex (OR = 3.0, 95% CI: 1.3-7.1), and having an HIV-positive sexual partner (OR= 1.4, 95% CI: 1.1-1.9). This study further demonstrates the public health utility of using the STARHS for the assessment of emerging trends in the HIV epidemic. Results from this study will help to target appropriate prevention strategies directed toward at-risk populations in Santos.

Publication Date: 2003

Publication Name: Jaids-journal of Acquired Immune Deficiency Syndromes

Research Interests:
Algorithms, Brazil, HIV, Multivariate Analysis, Humans, and 12 moreFemale, Male, Sexual Behavior, Hiv Infection, Incidence, Risk factors, Clinical Sciences, Prevalence, HIV testing, Adult, Risk Factors, and Sensitivity and Specificity

Publication Date: 2006

Publication Name: PLOS One

Research Interests:
Immune response, Multidisciplinary, HIV, Pregnancy, Humans, and 11 moreCord Blood, Female, Infant, PLoS one, Newborn Infant, Adult, Young Children, Drug Therapy, T cell activation, Vertical Transmission, and Cohort Studies

Download (.pdf)

Research Interests:
Polymorphism, Africa, Virology, Brazil, Adolescent, and 25 moreHIV, Genetic Diversity, Molecular Epidemiology, India, Biological Sciences, Phylogeny, Humans, Mutation, HIV protease, Virus, Female, Drug Resistance, Male, Polymerase Chain Reaction, AIDS, Middle Aged, Human immunodeficiency virus, Genotype, Adult, Phylogenetic Tree, Genetic variation, Amino Acid Profile, Amino Acid Sequence, Reverse Transcriptase, and Molecular Sequence Data

Download (.pdf)

Publication Date: 2005

Publication Name: Aids Research and Human Retroviruses

Research Interests:
Brazil, HIV, Phylogeny, AIDS, Clinical Sciences, and 4 moreHuman immunodeficiency virus, Spectrum, Genetic Recombination, and Full Length Movies

Download (.pdf)

Publication Date: 1995

Research Interests:
Virology, HIV, Biological Sciences, Phylogeny, Humans, and 10 moreSequence alignment, Close relationships, Newborn Infant, Human immunodeficiency virus, Genetic Recombination, Blood Transfusion, Species Specificity, Amino Acid Sequence, Base Sequence, and Molecular Sequence Data

Download (.pdf)

Publication Date: 1999

Publication Name: Aids

Research Interests:
Brazil, HIV, Biological Sciences, Humans, Male, and 5 moreAIDS, Incidence, Prisoners, Adult, and Sensitivity and Specificity

Publication Date: 1997

Research Interests:
Molecular Evolution, Virology, HIV, Biological Sciences, Humans, and 10 moreMutagenesis, Human immunodeficiency virus, Time Factors, Genetic Divergence, Amino Acid Profile, Host Specificity, Amino Acid Sequence, Base Sequence, Driving force, and Molecular Sequence Data

Download (.pdf)

Publication Date: 1997

Publication Name: Aids

Research Interests:
HIV, Biological Sciences, Phylogeny, Humans, Female, and 8 moreMale, AIDS, Time Factors, Disease Progression, Blood Transfusion, Amino Acid Sequence, Base Sequence, and Molecular Sequence Data

Download (.pdf)

Publication Date: 2002

Publication Name: Aids

Research Interests:
HIV, Biological Sciences, Humans, HIV protease, Female, and 6 moreMale, AIDS, Incidence, Genetic variation, Blood Donors, and Sensitivity and Specificity

Download (.pdf)

Since flow cytometry allows rapid,simultaneous and quantitative measurementsrelated to cell morphology andphysiologicy, the lipid-specificfluorescent dye, Nile Red, was employed forthe in vivo lipid quantification of Crypthecodinium... more

Since flow cytometry allows rapid,simultaneous and quantitative measurementsrelated to cell morphology andphysiologicy, the lipid-specificfluorescent dye, Nile Red, was employed forthe in vivo lipid quantification of Crypthecodinium cohnii, a heterotrophicmarine dinoflagellate rich inpolyunsaturated long chain fatty acids. Thefluorescence signal was linearly correlatedwith the neutral and polar lipid content asdetermined by gravimetric techniques. Asignificant correlation of NR signal wasalso observed between the polar to neutrallipid ratio and docohexaenoic acid percell. The results demonstrate a method forrapid lipid quantification that can be usedin the selection, isolation and culturecontrol of C. cohnii clones with highlipid and DHA content.