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1.
BMC Infect Dis ; 19(1): 352, 2019 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-31029097

RESUMEN

BACKGROUND: Cervical cancer is caused by oncogenic human papillomaviruses (HPV) and is one of the most common malignancies in women living in sub-Saharan Africa. Women infected with the human immunodeficiency virus (HIV) have a higher incidence of cervical cancer, but the full impact on HPV detection is not well understood, and associations of biological and behavioral factors with oncogenic HPV detection have not been fully examined. Therefore, a study was initiated to investigate factors that are associated with oncogenic HPV detection in Kenyan women. METHODS: Women without cervical dysplasia were enrolled in a longitudinal study. Data from enrollment are presented as a cross-sectional analysis. Demographic and behavioral data was collected, and HPV typing was performed on cervical swabs. HIV-uninfected women (n = 105) and HIV-infected women (n = 115) were compared for demographic and behavioral characteristics using t-tests, Chi-square tests, Wilcoxon sum rank tests or Fisher's exact tests, and for HPV detection using logistic regression or negative binomial models adjusted for demographic and behavioral characteristics using SAS 9.4 software. RESULTS: Compared to HIV-uninfected women, HIV-infected women were older, had more lifetime sexual partners, were less likely to be married, were more likely to regularly use condoms, and were more likely to have detection of HPV 16, other oncogenic HPV types, and multiple oncogenic types. In addition to HIV, more lifetime sexual partners was associated with a higher number of oncogenic HPV types (aIRR 1.007, 95% CI 1.007-1.012). Greater travel distance to the clinic was associated with increased HPV detection (aOR for detection of ≥ 2 HPV types: 3.212, 95% CI 1.206-8.552). Older age (aOR for HPV 16 detection: 0.871, 95% CI 0.764-0.993) and more lifetime pregnancies (aOR for detection of oncogenic HPV types: 0.706, 95% CI, 0.565-0.883) were associated with reduced detection. CONCLUSION: HIV infection, more lifetime sexual partners, and greater distance to health-care were associated with a higher risk of oncogenic HPV detection, in spite of ART use in those who were HIV-infected. Counseling of women about sexual practices, improved access to health-care facilities, and vaccination against HPV are all potentially important in reducing oncogenic HPV infections.


Asunto(s)
Infecciones por VIH/patología , Infecciones por Papillomavirus/diagnóstico , Adulto , Factores de Edad , Estudios Transversales , Femenino , Genotipo , Infecciones por VIH/epidemiología , Papillomavirus Humano 16/aislamiento & purificación , Humanos , Kenia/epidemiología , Modelos Logísticos , Estudios Longitudinales , Persona de Mediana Edad , Oportunidad Relativa , Infecciones por Papillomavirus/epidemiología , Infecciones por Papillomavirus/virología , Factores de Riesgo , Parejas Sexuales , Vagina/virología , Adulto Joven
2.
Opt Express ; 23(3): 3221-9, 2015 Feb 09.
Artículo en Inglés | MEDLINE | ID: mdl-25836180

RESUMEN

Picosecond-pulse III-V-on-silicon mode-locked lasers based on linear and ring extended cavity geometries are presented. In passive mode-locked operation a 12 kHz -3dB linewidth of the fundamental RF tone at 4.7 GHz is obtained for the linear cavity geometry and 16 kHz for the ring cavity geometry. Stabilization of the repetition rate of these devices using hybrid mode-locking is also demonstrated.

3.
Opt Lett ; 40(13): 3057-60, 2015 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-26125366

RESUMEN

An anti-colliding pulse-type III-V-on-silicon passively mode-locked laser is presented for the first time based on a III-V-on-silicon distributed Bragg reflector as outcoupling mirror implemented partially underneath the III-V saturable absorber. Passive mode-locking at 4.83 GHz repetition rate generating 3 ps pulses is demonstrated. The generated fundamental RF tone shows a 1.7 kHz 3 dB linewidth. Over 9 mW waveguide coupled output power is demonstrated.

4.
HIV Med ; 13(6): 372-8, 2012 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-22257000

RESUMEN

OBJECTIVES: The extent to which highly active antiretroviral therapy (HAART) affects human papillomavirus (HPV) acquisition and clearance in HIV-infected women is not well understood. We sought to describe high-risk HPV detection and clearance rates over time since HAART initiation, based on time-varying HIV viral load (VL) and CD4 T-cell count, using novel statistical methods. METHODS: We conducted a retrospective analysis of data from the completed AIDS Clinical Trials Group (ACTG) A5029 study using multi-state Markov models. Two sets of high-risk HPV types from 2003 and 2009 publications were considered. RESULTS: There was some evidence that VL>400 HIV-1 RNA copies/mL was marginally associated with a higher rate of HPV detection [P=0.068; hazard ratio (HR) =4.67], using the older set of high-risk HPV types. Such an association was not identified using the latest set of HPV types (P=0.343; HR=2.64). CD4 count >350 cells/µL was significantly associated with more rapid HPV clearance with both sets of HPV types (P=0.001, HR=3.93; P=0.018, HR=2.65). There was no evidence that HPV affects VL or CD4 cell count in any of the analyses. CONCLUSIONS: High-risk HPV types vary among studies and can affect the results of analyses. Use of HAART to improve CD4 cell count may have an impact on the control of HPV infection. The decrease in VL may also have an effect, although to a lesser degree.


Asunto(s)
Terapia Antirretroviral Altamente Activa , Seropositividad para VIH/tratamiento farmacológico , Seropositividad para VIH/inmunología , VIH-1/inmunología , Infecciones por Papillomavirus/inmunología , Adulto , Recuento de Linfocito CD4 , Femenino , Humanos , Infecciones por Papillomavirus/tratamiento farmacológico , Prevalencia , Estudios Retrospectivos , Frotis Vaginal , Carga Viral
5.
Infect Dis Obstet Gynecol ; 2012: 868526, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22505800

RESUMEN

BACKGROUND: The role of suppressive HSV therapy in women coinfected with HSV-2 and HIV-1 taking highly active antiretroviral therapy (HAART) is unclear. METHODS: 60 women with HIV-1/HSV-2 coinfection on HAART with plasma HIV-1 viral load (PVL) ≤75 copies/mL were randomized to receive acyclovir (N = 30) or no acyclovir (N = 30). PVL, genital tract (GT) HIV-1, and GT HSV were measured every 4 weeks for one year. RESULTS: Detection of GT HIV-1 was not significantly different in the two arms (OR 1.23, P = 0.67), although this pilot study was underpowered to detect this difference. When PVL was undetectable, the odds of detecting GT HIV were 0.4 times smaller in the acyclovir arm than in the control arm, though this was not statistically significant (P = 0.07). The odds of detecting GT HSV DNA in women receiving acyclovir were significantly lower than in women in the control group, OR 0.38, P < 0.05. CONCLUSIONS: Chronic suppressive therapy with acyclovir in HIV-1/HSV-2-positive women on HAART significantly reduces asymptomatic GT HSV shedding, though not GT HIV shedding or PVL. PVL was strongly associated with GT HIV shedding, reinforcing the importance of HAART in decreasing HIV sexual transmission.


Asunto(s)
Terapia Antirretroviral Altamente Activa/métodos , Genitales Femeninos/virología , Infecciones por VIH/tratamiento farmacológico , VIH-1/efectos de los fármacos , Herpes Genital/tratamiento farmacológico , Herpesvirus Humano 2 , Aciclovir/uso terapéutico , Adulto , Antivirales/uso terapéutico , Coinfección , ADN Viral/análisis , Femenino , Infecciones por VIH/complicaciones , Humanos , Persona de Mediana Edad , Proyectos Piloto , ARN Viral/sangre , Análisis de Regresión , Carga Viral , Esparcimiento de Virus/efectos de los fármacos , Adulto Joven
6.
Ann Med ; 54(1): 1202-1211, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-35521812

RESUMEN

The East Africa Consortium was formed to study the epidemiology of human papillomavirus (HPV) infections and cervical cancer and the influence of human immunodeficiency virus (HIV) infection on HPV and cervical cancer, and to encourage collaborations between researchers in North America and East African countries. To date, studies have led to a better understanding of the influence of HIV infection on the detection and persistence of oncogenic HPV, the effects of dietary aflatoxin on the persistence of HPV, the benefits of antiretroviral therapy on HPV persistence, and the differences in HPV detections among HIV-infected and HIV-uninfected women undergoing treatment for cervical dysplasia by either cryotherapy or LEEP. It will now be determined how HPV testing fits into cervical cancer screening programs in Kenya and Uganda, how aflatoxin influences immunological control of HIV, how HPV alters certain genes involved in the growth of tumours in HIV-infected women. Although there have been challenges in performing this research, with time, this work should help to reduce the burden of cervical cancer and other cancers related to HIV infection in people living in sub-Saharan Africa, as well as optimized processes to better facilitate research as well as patient autonomy and safety. KEY MESSAGESThe East Africa Consortium was formed to study the epidemiology of human papillomavirus (HPV) infections and cervical cancer and the influence of human immunodeficiency virus (HIV) infection on HPV and cervical cancer.Collaborations have been established between researchers in North America and East African countries for these studies.Studies have led to a better understanding of the influence of HIV infection on the detection and persistence of oncogenic HPV, the effects of dietary aflatoxin on HPV detection, the benefits of antiretroviral therapy on HPV persistence, and the differences in HPV detections among HIV-infected and HIV-uninfected women undergoing treatment for cervical dysplasia by either cryotherapy or LEEP.


Asunto(s)
Aflatoxinas , Alphapapillomavirus , Infecciones por VIH , Infecciones por Papillomavirus , Displasia del Cuello del Útero , Neoplasias del Cuello Uterino , Detección Precoz del Cáncer , Femenino , Infecciones por VIH/complicaciones , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Humanos , Papillomaviridae/genética , Infecciones por Papillomavirus/complicaciones , Infecciones por Papillomavirus/epidemiología , Neoplasias del Cuello Uterino/epidemiología , Displasia del Cuello del Útero/epidemiología
7.
Stat Med ; 30(17): 2160-70, 2011 Jul 30.
Artículo en Inglés | MEDLINE | ID: mdl-21538985

RESUMEN

Multi-state modeling is often employed to describe the progression of a disease process. In epidemiological studies of certain diseases, the disease state is typically only observed at periodic clinical visits, producing incomplete longitudinal data. In this paper we consider fitting semi-Markov models to estimate the persistence of human papillomavirus (HPV) type-specific infection in studies where the status of HPV type(s) is assessed periodically. Simulation study results are presented indicating that the semi-Markov estimator is more accurate than an estimator currently used in the HPV literature. The methods are illustrated using data from the HIV Epidemiology Research Study.


Asunto(s)
Cadenas de Markov , Modelos Inmunológicos , Papillomaviridae/inmunología , Infecciones por Papillomavirus/inmunología , Infecciones por Papillomavirus/virología , Simulación por Computador , Femenino , Humanos , Estudios Longitudinales , Infecciones por Papillomavirus/epidemiología
8.
J Infect Dis ; 202(10): 1567-76, 2010 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-20925532

RESUMEN

BACKGROUND: The prevalence of and risk factors for abnormal anal cytology among men and women with human immunodeficiency virus (HIV) infection have not been extensively investigated. METHODS: The Study to Understand the Natural History of HIV and AIDS in the Era of Effective Therapy (SUN study) is a prospective cohort study of HIV-infected patients in 4 US cities. Baseline questionnaires were administered and anal samples for cytology and human papillomavirus (HPV) detection and genotyping were collected. RESULTS: Among 471 men and 150 women (median age, 41 years), 78% of participants were receiving combination antiretroviral therapy, 41% had a CD4(+) cell count of ≥500 cells/µL, and 71% had an HIV RNA viral load of <400 copies/mL. The anal cytology results were as follows: 336 participants (54%) had negative results, 96 participants (15%) had atypical squamous cells, 149 participants (24%) had low-grade squamous intraepithelial lesions, and 40 participants (6%) had high-grade squamous intraepithelial lesions. In a multivariate analysis, abnormal anal cytology was associated with number of high-risk and low-risk HPV types (adjusted odds ratio [AOR] for both, 1.28; P < .001), nadir CD4(+) cell count of <50 cells/µL (AOR, 2.38; P = .001), baseline CD4(+) cell count of <500 cells/µL (AOR, 1.75; P = .004), and ever having receptive anal intercourse (AOR, 2.51; P < .001). CONCLUSION: HIV-infected persons with multiple anal HPV types or a nadir CD4(+) cell count of <50 cells/µL have an increased risk for abnormal anal cytology.


Asunto(s)
Infecciones por VIH/patología , Enfermedades del Recto/epidemiología , Enfermedades del Recto/patología , Recto/patología , Adulto , Fármacos Anti-VIH/uso terapéutico , Terapia Antirretroviral Altamente Activa , Estudios de Cohortes , Estudios Transversales , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de Células Escamosas/epidemiología , Neoplasias de Células Escamosas/patología , Papillomaviridae/clasificación , Papillomaviridae/aislamiento & purificación , Infecciones por Papillomavirus/epidemiología , Infecciones por Papillomavirus/patología , Enfermedades del Recto/microbiología , Neoplasias del Recto/epidemiología , Neoplasias del Recto/patología , Recto/microbiología , Estados Unidos/epidemiología , Población Urbana
9.
AIDS ; 14(4): 415-21, 2000 Mar 10.
Artículo en Inglés | MEDLINE | ID: mdl-10770544

RESUMEN

OBJECTIVES: To determine the frequency of cervicovaginal lavage and plasma HIV-1 RNA levels that are below detectable levels (< 400 copies/ml) among women on highly active antiretroviral therapy (HAART), non-HAART and on no therapy. To compare the effect of initiating HAART on the timing of HIV-1 RNA suppression in the blood plasma and genital tract among antiretroviral-naïve women. METHODS: Data were obtained from 205 HIV-infected women with paired plasma and cervicovaginal lavage viral load measurements. Seven antiretroviral-naïve women starting HAART had viral load measurements performed daily for one week, at 2 weeks and at 1 month after initiating therapy. Viral load quantification was carried out by nucleic acid sequence-based amplification assay. The lower limit of detection was 400 copies/ml. RESULTS: Plasma and cervicovaginal HIV-1 RNA was detectable in 71 and 26% of the women, respectively. Among women with plasma viral loads less than 400, 400-9999, and 10,000 copies/ml or over, genital tract HIV-1 RNA was detected in 3, 17 and 48%, respectively (P < 0.001). Fifty-one per cent of the women with CD4 cell counts of less than 200/mm3 had detectable cervicovaginal viral loads compared with 18% among women with CD4 cell counts of 200/mm3 or over (P < 0.001). Cervicovaginal HIV-1 RNA was less than 400 copies/ml in 85% of those on HAART, 69% of those on non-HAART and 69% of those on no therapy (P < 0.045). In seven antiretroviral-naïve women initiating HAART, cervicovaginal HIV-1 RNA decreased by 0.7-2.1 log10 within 1-14 days of starting therapy. CONCLUSION: The cervicovaginal HIV-1 RNA level was positively correlated with plasma HIV-1 RNA and negatively with the CD4 cell count. The use of HAART was significantly associated with below-detectable levels of HIV-1 RNA in both plasma and the genital tract. HIV-1 RNA suppression in the genital tract may occur rapidly after initiating therapy.


Asunto(s)
Fármacos Anti-VIH/uso terapéutico , Cuello del Útero/virología , Infecciones por VIH/virología , VIH-1/aislamiento & purificación , ARN Viral/análisis , Vagina/virología , Adulto , Fármacos Anti-VIH/administración & dosificación , Candidiasis Vulvovaginal/complicaciones , Estudios Transversales , Quimioterapia Combinada , Femenino , Infecciones por VIH/complicaciones , Infecciones por VIH/tratamiento farmacológico , Inhibidores de la Proteasa del VIH/administración & dosificación , Inhibidores de la Proteasa del VIH/uso terapéutico , VIH-1/genética , Humanos , Persona de Mediana Edad , ARN Viral/sangre , Inhibidores de la Transcriptasa Inversa/administración & dosificación , Inhibidores de la Transcriptasa Inversa/uso terapéutico
10.
AIDS ; 14(13): 1911-5, 2000 Sep 08.
Artículo en Inglés | MEDLINE | ID: mdl-10997394

RESUMEN

OBJECTIVE: To characterize HIV-1 specific cellular immune responses at mucosal surfaces using a rapid, sensitive enzyme-linked immuno-spot (ELISPOT) technique. DESIGN: Cervicovaginal mononuclear cells obtained from cytobrush and cervicovaginal lavage were assessed for production of interferon-gamma (IFN-gamma) in response to stimulation by HIV-1 antigens. HIV-1 specific responses were compared in a cross-sectional study of two HIV-1-positive patient groups: women not currently on antiretroviral therapy with peripheral CD4 cell counts > 250 x 10(6)/l (n = 12); and women on highly active antiretroviral therapy (HAART) (n = 9). METHODS: Mononuclear cells from peripheral blood or cervicovaginal specimens were assessed in an ELISPOT assay for responses to HIV-1 antigens expressed by recombinant vaccinia viruses. This assay detects primarily CD8 T cells and shows good correlation with MHC class I tetramer staining of cytotoxic T lymphocytes. RESULTS: HIV-1 specific IFN-gamma spot-forming cells were detected in cervicovaginal samples of one out of nine women (11%) on HAART and five out of 12 women (42%) not currently on HAART. In peripheral blood mononuclear cells, HIV-1 specific IFN-gamma spot-forming cells were significantly more numerous in women not currently on HAART than in women on HAART (P = 0.009). In most cases, antigens recognized by mucosal T cells were also recognized by PBMC; however, there were exceptions. CONCLUSIONS: HIV-1-specific antigen-reactive T cells may be detected in routine, noninvasive gynecological specimens. The results suggest that cervicovaginal HIV-1-specific T cells may be less numerous in individuals on HAART than in those not on HAART, as shown previously for HIV-1-specific cytotoxic T lymphocytes in the peripheral blood.


Asunto(s)
Linfocitos T CD8-positivos/inmunología , Cuello del Útero/inmunología , Infecciones por VIH/inmunología , VIH-1/inmunología , Inmunidad Mucosa , Vagina/inmunología , Terapia Antirretroviral Altamente Activa , Recuento de Linfocito CD4 , Cuello del Útero/citología , Estudios Transversales , Ensayo de Inmunoadsorción Enzimática/métodos , Femenino , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/virología , Humanos , Interferón gamma/biosíntesis , Membrana Mucosa/citología , Membrana Mucosa/inmunología , Vagina/citología
11.
AIDS ; 15(12): 1535-43, 2001 Aug 17.
Artículo en Inglés | MEDLINE | ID: mdl-11504986

RESUMEN

OBJECTIVES: To evaluate the effect of the menstrual cycle in HIV-positive women on plasma and genital cytokine levels, interrelationships between vaginal and plasma cytokines, CD4 and CD8 T cell fluctuations, and genital and plasma viral loads. METHODS: Plasma and cervicovaginal lavage specimens were collected from 55 HIV-positive women with CD4 cell counts < 350 cells/microl during phases of the menstrual cycle. Samples were assayed for IL-1beta, IL-6, IL-4, IL-8, IL-10, TGFbeta, TNFalpha, INFgamma, MIP1alpha, MIP1beta, RANTES, and TNFR-II using enzyme-linked immunosorbent assays. CD4 and CD8 T cell expression was evaluated by flow cytometry. Repeated measures regression models were used to assess the effect of the menstrual cycle on cytokines and viral load. Multivariate repeated regression models were used to assess the correlation among selected cytokines and between selected cytokines and HIV viral load. RESULTS: Vaginal IL-1beta, IL-4, IL-6, IL-8, IL-10, MIP1beta, RANTES, TGFbeta, and TNFR-II were significantly elevated during menses but were not altered during other phases. Plasma cytokine levels were not altered during the menstrual cycle. A positive Candida culture increased vaginal IL-8 during menses, whereas vaginal discharge was associated with a reduction in vaginal IL-4, IL-10, and RANTES. CD4 and CD8 cell numbers did not vary with the menstrual cycle. Vaginal cytokine levels correlated only with vaginal viral load, in a sampling method-dependent manner. CONCLUSION: We provide evidence of elevated vaginal cytokine levels during menses, which appear to regulate vaginal and not plasma HIV shedding, suggesting that a menstrual cycle pattern exists for cytokine production in HIV-positive women impacting vaginal shedding of HIV.


Asunto(s)
Citocinas/metabolismo , Infecciones por VIH/inmunología , VIH-1/fisiología , Ciclo Menstrual/inmunología , Vagina/virología , Adolescente , Adulto , Citocinas/sangre , Femenino , Infecciones por VIH/virología , VIH-1/aislamiento & purificación , Humanos , Persona de Mediana Edad , ARN Viral/sangre , Linfocitos T/inmunología , Vagina/inmunología , Carga Viral , Esparcimiento de Virus/fisiología
12.
AIDS ; 14(14): 2101-7, 2000 Sep 29.
Artículo en Inglés | MEDLINE | ID: mdl-11061650

RESUMEN

OBJECTIVE: To assess the variation in HIV-1 over the menstrual cycle, including RNA levels in the female genital tract, plasma HIV-1-RNA levels, CD4 cell counts, and culturable virus. DESIGN: A prospective analysis of 55 HIV-1-infected women. METHODS: Blood and genital tract specimens were collected weekly over 8 weeks, spanning two complete menstrual cycles. Applying repeated-measures models that used menses as the reference level, the variation in viral RNA levels was compared in endocervical canal fluid and cells (collected by Sno-strips and cytobrush, respectively) and ectocervicovaginal lavage (CVL) fluid. Repeated-measures models were also used to assess the variation in plasma CD4 cell counts and viral load. RESULTS: Shedding patterns differed among the three sampling methods, independent of genital tract co-infections. Genital tract HIV-1-RNA levels from CVL fluid and endocervical canal cytobrush specimens were highest during menses and lowest immediately thereafter (P = 0.001 and P = 0.04). The HIV-1-RNA level in endocervical canal fluid was highest in the week preceding menses (P = 0.003). The menstrual cycle had no effect on blood levels of RNA (P = 0.62), culturable virus (P = 0.34), or CD4 cell counts (P = 0.55). HIV-1-RNA levels were higher in endocervical canal fluid than in peripheral blood plasma during the late luteal phase (P = 0.03). CONCLUSION: HIV-1-RNA levels vary with the menstrual cycle in the female genital tract but not the blood compartment. HIV-1-RNA levels are higher in endocervical canal fluid than in blood plasma. These findings may have important implications for sex-specific pathogenesis, heterosexual transmission, and contraceptive hormone interventions in HIV-1-infected women.


Asunto(s)
Genitales Femeninos/virología , Infecciones por VIH/virología , VIH-1/aislamiento & purificación , Ciclo Menstrual , Viremia , Adulto , Recuento de Linfocito CD4 , Femenino , Infecciones por VIH/inmunología , VIH-1/inmunología , Humanos , Fase Luteínica , Estudios Prospectivos , ARN Viral/análisis , Irrigación Terapéutica , Carga Viral
13.
J Immunol Methods ; 202(2): 153-61, 1997 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-9107304

RESUMEN

The purpose of this study was to systematically compare 3 collection methods, Sno-strips, wicks and cervical-vaginal lavage, for analysis of immunoglobulin concentrations in female genital secretions. In each of 8 women, absorbent wicks and Sno-strips were applied at 4 locations: the lateral wall of the vagina; the posterior vaginal fornix; the surface of the exocervix; and the endocervical canal. Cervical-vaginal lavage was then performed in 4 women with 5 ml PBS. Immunoglobulin and protein concentrations in lavage samples were generally over 100 times lower than in the secretions captured directly from mucosal surfaces with either Sno-strips or wicks. Capture of undiluted secretions with either wicks or Sno-strips allowed calculation of actual immunoglobulin concentrations at specific mucosal sites: for example, median IgA levels were consistently highest in the endocervix and lowest in the vagina. Such information may be crucial in evaluating the correlates of protective immunity against micro-organisms that infect or invade discrete regions of the genital mucosa.


Asunto(s)
Cuello del Útero/inmunología , Inmunidad Mucosa , Inmunoglobulinas/análisis , Vagina/inmunología , Adolescente , Adulto , Equipos Desechables , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos
14.
Am J Med ; 101(3): 316-22, 1996 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-8873494

RESUMEN

Women constitute the fastest growing segment of adults with acquired immunodeficiency syndrome (AIDS), representing 18% of all cases in the United States in 1994. Heterosexual transmission is now the dominant route by which women are infected. Recent reports indicate that although certain manifestations may be different in women than in men, the rate of clinical progression is similar when they receive comparable medical treatment. Antiretroviral therapy is equally as effective in women as in men. As in men, Pneumocystis carinii pneumonia is the most frequent AIDS-defining diagnosis in women. Candida esophagitis and ulcers secondary to herpes simplex virus are more common in women. Kaposi's sarcoma is rare. The prevalence of humanpapilloma virus infection and cervical neoplasia is increased in HIV-seropositive women. Vaginitis due to candida, trichomonas, and bacterial vaginosis are common findings among human immunodeficiency virus seropositive women. The clinical course and response to therapy in certain sexually transmitted diseases (syphilis and herpes) may be altered. The use of zidovudine during pregnancy and delivery has been associated with a 67.5% reduction in vertical transmission.


Asunto(s)
Infecciones por VIH , Síndrome de Inmunodeficiencia Adquirida/complicaciones , Síndrome de Inmunodeficiencia Adquirida/diagnóstico , Síndrome de Inmunodeficiencia Adquirida/epidemiología , Costo de Enfermedad , Femenino , Enfermedades de los Genitales Femeninos/complicaciones , Infecciones por VIH/complicaciones , Infecciones por VIH/diagnóstico , Infecciones por VIH/epidemiología , Infecciones por VIH/transmisión , Humanos , Masculino , Embarazo , Complicaciones Infecciosas del Embarazo , Factores Sexuales , Estados Unidos/epidemiología
15.
J Clin Virol ; 19(3): 187-93, 2000 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11090755

RESUMEN

BACKGROUND: polymerase chain reaction (PCR)-based assays for human papillomavirus (HPV) sequences are in wide use in clinical and epidemiological studies. The reproducibility of these assays is not extensively studied. OBJECTIVES: to estimate the intra-laboratory reproducibility of generic and type-specific HPV diagnoses by the MY09/MY11/HMB01 consensus L1 primer-based PCR assay. STUDY DESIGN: systematically collected specimens (n=207) were masked and retested. RESULTS: when specimens negative in both initial and repeat assays were excluded from analysis, the diagnostic reproducibility was 98. 6% for beta-globin, 90.7% for generic HPV (any HPV type), and 76.9% for type-specific HPVs. The reproducibility of type-specific diagnosis increased with increase in signal strength in the hybridization reaction of the initial assay. When a specimen contained five or more HPV types in the initial assay, it was rare to identify all of the HPV types in the repeat assay. CONCLUSIONS: the degree of reproducibility of the PCR diagnosis should be taken into account in the interpretation of HPV data in clinical and epidemiological studies.


Asunto(s)
Cuello del Útero/virología , Laboratorios/normas , Papillomaviridae/aislamiento & purificación , Reacción en Cadena de la Polimerasa/normas , ADN Viral/análisis , Femenino , Genotipo , Globinas , Humanos , Papillomaviridae/genética , Infecciones por Papillomavirus/virología , Reproducibilidad de los Resultados , Infecciones Tumorales por Virus/virología
16.
Obstet Gynecol ; 90(5): 739-43, 1997 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-9351756

RESUMEN

OBJECTIVE: To evaluate human immunodeficiency virus (HIV)-1 RNA burden in paired plasma and cervicovaginal lavage specimens and to assess the relation of plasma HIV-1 RNA level, CD4 cell count, and antiretroviral therapy with cervicovaginal HIV-1 viral load. METHODS: Paired blood and cervicovaginal lavage specimens were collected from 72 HIV-infected women. Quantitation of HIV-1 RNA from plasma and cervicovaginal lavage specimens was performed by using the nucleic acid sequence-based amplification assay. Analyses examined relations between cervicovaginal HIV-1 RNA and plasma HIV-1 RNA level, CD4 count, and antiretroviral therapy. RESULTS: Plasma HIV-1 RNA was detectable in 61 of 72 women (85%), with copy numbers ranging from 330 to 1,600,000 copies/mL. Twenty-eight of 72 (39%) had detectable HIV-1 RNA in cervicovaginal lavage specimens, ranging from 320 to 440,000 copies/mL. The cervicovaginal lavage HIV-1 RNA level was detectable in 9%, 29%, 52%, and 53% of the women with plasma HIV-1 RNA of less than 400, 400-9999, 10,000-100,000, and more than 100,000 copies, respectively (P = .043). Among women with CD4 counts of less than 200, 200-500, and greater than 500/mm3, cervicovaginal lavage HIV-1 RNA was detected in 67%, 32%, and 25% of subjects, respectively (P = .018). Among women receiving antiretroviral therapy, cervicovaginal lavage revealed HIV-1 RNA in 67%, 31%, and 25% with CD4 cell counts of less than 200, 200-500, and more than 500/mm3, respectively (P = .042). CONCLUSION: The presence of HIV-1 RNA in cervicovaginal lavage correlates significantly with the level of HIV-1 RNA in plasma and negatively with CD4 cell count.


Asunto(s)
Cuello del Útero/virología , Infecciones por VIH/virología , VIH-1/aislamiento & purificación , Vagina/virología , Carga Viral , Adulto , Fármacos Anti-VIH/uso terapéutico , Recuento de Linfocito CD4 , Cuello del Útero/metabolismo , Femenino , Infecciones por VIH/diagnóstico , Infecciones por VIH/tratamiento farmacológico , Seropositividad para VIH , Humanos , ARN Viral/sangre , Irrigación Terapéutica , Vagina/metabolismo
17.
Obstet Gynecol ; 94(5 Pt 1): 799-801, 1999 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-10546733

RESUMEN

Vertical transmission of human immunodeficiency virus (HIV) accounts for most new pediatric cases in the United States. With the routine use of zidovudine in the antepartum, intrapartum, and postnatal periods, transmission of HIV from mother to infant has decreased significantly during the past 5 years. Most transmission occurs during labor and delivery, so the effect of mode of delivery recently has been investigated. Several studies support cesarean to further reduce infection in newborns. However, those studies are limited by lack of data on concomitant effects of viral load and effects of combined antiretroviral therapy. There also might be increased operative morbidity in this population. Therefore, we suggest caution in establishing cesarean as a standard for delivery of HIV-infected women.


Asunto(s)
Cesárea , Infecciones por VIH/prevención & control , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Complicaciones Infecciosas del Embarazo , Femenino , Humanos , Embarazo
18.
Obstet Gynecol ; 98(4): 656-63, 2001 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-11576584

RESUMEN

OBJECTIVE: To determine the natural history of bacterial vaginosis in women with or at risk for human immunodeficiency virus (HIV). METHODS: A cohort of 854 HIV-infected women and 434 HIV-uninfected women from four US sites was followed prospectively with gynecologic exams every 6 months over a 5-year period. The prevalence, incidence, persistence, and severity of bacterial vaginosis, which was defined using a Gram-staining scoring system, were calculated using generalized estimating equation methods. RESULTS: In adjusted analyses, HIV-infected women had a higher prevalence of bacterial vaginosis than HIV-uninfected women (adjusted odds ratio [OR] 1.29; 95% confidence interval [CI] 1.08, 1.55). Although HIV-infected women were not more likely to have incident infections, they were more likely to have persistence of their infections (adjusted OR 1.49; 95% CI 1.18, 1.89). Similarly, immunocompromised women (CD4+ cell count less than 200 cells/microL) were more likely than HIV-infected women with higher CD4+ cell counts (more than 500 cells/microL) to have prevalent (adjusted OR 1.29; 95% CI 1.03, 1.60) and persistent (adjusted OR 1.38; 95% CI 1.01, 1.91) bacterial vaginosis infections, but not more likely to have incident infections. Immunocompromised women had more severe bacterial vaginosis by both clinical criteria (adjusted OR 1.40; 95% CI 1.08, 1.82) and by Gram-staining criteria (adjusted OR 1.50; 95% CI 1.12, 2.00). CONCLUSIONS: Bacterial vaginosis is more prevalent and persistent among HIV-infected women, particularly among those who are immunocompromised. Immunocompromised women are more likely than HIV-infected women with higher CD4+ cell counts to have severe bacterial vaginosis.


Asunto(s)
Infecciones Oportunistas Relacionadas con el SIDA/epidemiología , Vaginosis Bacteriana/epidemiología , Infecciones Oportunistas Relacionadas con el SIDA/clasificación , Adolescente , Adulto , Femenino , Infecciones por VIH/complicaciones , Infecciones por VIH/epidemiología , Seronegatividad para VIH , Humanos , Incidencia , Estudios Longitudinales , Persona de Mediana Edad , Oportunidad Relativa , Prevalencia , Factores de Riesgo , Índice de Severidad de la Enfermedad , Estados Unidos/epidemiología , Vaginosis Bacteriana/clasificación , Vaginosis Bacteriana/complicaciones
19.
Obstet Gynecol ; 84(6): 1016-20, 1994 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-7970456

RESUMEN

OBJECTIVE: To evaluate the rate of discrepancy between cytology and histology in a referral-based population of human immunodeficiency virus (HIV)-positive women compared to HIV-negative women and women whose HIV status was unknown. METHODS: From January 1, 1990 to December 31, 1993, approximately 830 women underwent evaluation at Women and Infants' Hospital colposcopy clinic. Women who had histologic diagnosis and recent cytologic evaluation during this interval (N = 678) were selected for study. Forty-one HIV-positive women were compared to 228 HIV-negative women and 409 women whose HIV status was unknown. RESULTS: Of the 41 HIV-positive women, seven (17%) were noted to have a discrepancy between cytologic and histologic findings. In HIV-negative and HIV-unknown women, 15% (34 of 228) and 22% (91 of 409) were discrepant, respectively. Using HIV-negative women as the reference group, the relative risk of cytologic-histologic discrepancy was 1.1 (95% confidence interval [CI] 0.51-2.41) for HIV-positive women and 1.5 (95% CI 1.04-2.14) for women whose HIV status was unknown. CONCLUSION: Human immunodeficiency virus-positive women referred for colposcopic evaluation have no more cytologic-histologic discrepancy than HIV-negative women or women whose HIV status is unknown.


Asunto(s)
Cuello del Útero/patología , Colposcopía , Seropositividad para VIH , Enfermedades del Cuello del Útero/diagnóstico , Frotis Vaginal , Femenino , Seropositividad para VIH/complicaciones , Humanos , Enfermedades del Cuello del Útero/complicaciones , Enfermedades del Cuello del Útero/patología
20.
Soc Sci Med ; 52(4): 599-608, 2001 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11206656

RESUMEN

Women prisoners in the Philippines are particularly vulnerable to HIV infection. The economic and social disadvantages that women endure in mainstream society are magnified once they are committed to penitentiaries where control over one's own life is even more restricted and limited. Outside prison, impoverished and uninformed about the ways of protecting their health, women have engaged in unprotected sex with their male partners, many of whom have had casual sex or extra-marital affairs. Within prison, it is therefore not surprising that over 25% of women were already infected with sexually transmitted diseases (STDs). None were infected with HIV. The presence of STDs among female inmates highlights the importance of addressing health needs while at the correctional facility. It also raises the need for educational and prevention programs and health services that will help reduce women's vulnerability to HIV, AIDS and STDs.


Asunto(s)
Prisioneros/estadística & datos numéricos , Asunción de Riesgos , Conducta Sexual , Enfermedades de Transmisión Sexual/epidemiología , Adulto , Estudios Transversales , Femenino , Infecciones por VIH/prevención & control , Conocimientos, Actitudes y Práctica en Salud , Humanos , Persona de Mediana Edad , Filipinas/epidemiología , Enfermedades de Transmisión Sexual/prevención & control , Factores Socioeconómicos , Trastornos Relacionados con Sustancias/epidemiología
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