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Smooth muscle cells (SMCs), Interstitial cells of Cajal (ICC) and Platelet-derived growth factor receptor α positive (PDGFRα+) cells form an integrated, electrical syncytium within the gastrointestinal (GI) muscular tissues known as the SIP syncytium. Immunohistochemical analysis of gastric corpus muscles showed that c-KIT+/ANO1+ ICC-IM and PDGFRα+ cells were closely apposed to one another in the same anatomical niches. We used intracellular microelectrode recording from corpus muscle bundles to characterize the roles of intramuscular ICC and PDGFRα+ cells in conditioning membrane potentials of gastric muscles. In muscle bundles, that have a relatively higher input impedance than larger muscle strips or sheets, we recorded an ongoing discharge of stochastic fluctuations in membrane potential, previously called unitary potentials or spontaneous transient depolarizations (STDs) and spontaneous transient hyperpolarizations (STHs). We reasoned that STDs should be blocked by antagonists of ANO1, the signature conductance of ICC. Activation of ANO1 has been shown to generate spontaneous transient inward currents (STICs), which are the basis for STDs. Ani9 reduced membrane noise and caused hyperpolarization, but this agent did not block the fluctuations in membrane potential quantitatively. Apamin, an antagonist of small conductance Ca2+-activated K+ channels (SK3), the signature conductance in PDGFRα+ cells, further reduced membrane noise and caused depolarization. Reversing the order of channel antagonists reversed the sequence of depolarization and hyperpolarization. These experiments show that the ongoing discharge of STDs and STHs by ICC and PDGFRα+ cells, respectively, exerts conditioning effects on membrane potentials in the SIP syncytium that would effectively regulate the excitability of SMCs.
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Células Gigantes , Células Intersticiais de Cajal , Potenciais da Membrana , Receptor alfa de Fator de Crescimento Derivado de Plaquetas , Animais , Células Intersticiais de Cajal/fisiologia , Células Intersticiais de Cajal/metabolismo , Camundongos , Potenciais da Membrana/fisiologia , Células Gigantes/metabolismo , Células Gigantes/fisiologia , Receptor alfa de Fator de Crescimento Derivado de Plaquetas/metabolismo , Anoctamina-1/metabolismo , Estômago/fisiologia , Estômago/citologia , Miócitos de Músculo Liso/metabolismo , Miócitos de Músculo Liso/fisiologia , Proteínas Proto-Oncogênicas c-kit/metabolismo , Masculino , Camundongos Endogâmicos C57BLRESUMO
We reviewed data obtained in October 2021-May 2023 from youth who reported a history of sexual activity upon admission to 1 of 12 juvenile justice facilities in Utah, USA, that offered screening for Chlamydia trachomatis and Neisseria gonorrhoeae. Urinalysis revealed C. trachomatis positivity of 10.77%, N. gonorrhoeae positivity of 1.08%, and coinfection C. trachomatis N. gonorrhoeae) of 0.90%. Prevalence of infection was similar for youths in rural and urban facilities. A total of 12.01% of those identifying as male and 14.01% of those identifying as female tested positive for C. trachomatis, N. gonorrhoeae, or coinfection. Of young adults who tested positive, 74.65% received their results while incarcerated, all of whom accepted treatment. Our research underscores the feasibility of providing prompt C. trachomatis/N. gonorrhoeae screening and treatment in juvenile correctional facilities. The pervasiveness of infection emphasizes the urgent need for early identification and treatment for C. trachomatis and N. gonorrhoeae in incarcerated youth nationwide.
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Infecções por Chlamydia , Coinfecção , Gonorreia , Adulto Jovem , Adolescente , Masculino , Feminino , Humanos , Gonorreia/diagnóstico , Gonorreia/epidemiologia , Gonorreia/prevenção & controle , Infecções por Chlamydia/diagnóstico , Infecções por Chlamydia/epidemiologia , Utah/epidemiologia , Coinfecção/epidemiologia , Neisseria gonorrhoeae , Chlamydia trachomatis , Estabelecimentos Correcionais , Prevalência , Programas de Rastreamento/métodosRESUMO
Sexually transmitted infections (STIs) continue to be a health concern in the United States, particularly in rural settings. Point-of-care (POC) STI testing is useful in overcoming access barriers in these settings. The purpose of this project was to implement POC STI testing to increase access to care in rural settings and test the feasibility of this model. Six mobile health clinics were implemented by a nurse-led team in three rural communities in the Blackbelt region of Alabama utilizing the Binx IO® to test for chlamydia and gonorrhea. Mobile clinic volunteers participated in focus groups to determine provider satisfaction with clinic workflow. The mobile health clinics were a feasible way to increase access to STI testing in rural settings with reported provider and client satisfaction in work flow.
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People who use crack cocaine (PWUCC) are a population severely impacted by a concentrated epidemic of HIV. Behavioral interventions to prevent and treat HIV among PWUCC have been implemented around the world including in low- and middle-income countries which have been disproportionately affected by HIV. However, few studies have validated and assessed psychometric properties of measures on PWUCC, especially in transnational populations. Our sample was comprised of 1324 PWUCC, Spanish mono-lingual speakers, residing in the metropolitan area of San Salvador, El Salvador. Exploratory factor analysis and subsequent confirmatory factor analysis using statistical softwares SPSS and Amos were conducted on three abbreviated and translated condom use attitude measures (i.e., Condom Use Attitudes Scale-Spanish Short Form, Condom Use Social Norm-Spanish Short Form [CUSN-SSF], Condom Use Self-Efficacy-Spanish Short Form). Convergent validity was examined by computing bivariate correlations between the scales and condom use and sexually transmitted disease diagnosis. Results indicated that a two-factor, 8-item correlated model for the CUAS-SSF scale had an excellent fit and adequate reliability (α = .76). The confirmatory factor analysis for the 5-item CUSN-SSF scale indicated a satisfactory fit with 3 of 6 fit indices indicating adequate fit. Analysis of the two-factor 5-item CUSE-SSF scale indicated satisfactory fit and adequate reliability (α = .84). There were significant correlations between all measures and with self-reported condom use. Results indicate that these brief measures are reliable and valid and can be utilized to assess the effectiveness of HIV risk reduction interventions among Spanish-speaking PWUCC.
Assuntos
Cocaína Crack , Infecções por HIV , Preservativos , El Salvador , Infecções por HIV/prevenção & controle , Humanos , Psicometria , Reprodutibilidade dos Testes , Inquéritos e QuestionáriosRESUMO
In the context of sex-ratio imbalance and rural-to-urban migration in China, never-married male migrants may become a vulnerable group as well as a bridge population that facilitates HIV/STDs transmission. It is still not clear, however, whether increased HIV/STDs transmission risk can be attributed to bachelorhood, migration, or both. This study identified the contributions of bachelorhood and migration to an increased risk of HIV/STDs infection, as well as the risk of HIV/STDs transmission across populations and regions. Data were from a cross-sectional questionnaire survey, in which 180 never-married non-migrant males in rural areas, 558 never-married male migrants, and 302 married male migrants in urban areas of China were interviewed in 2017. Results showed that never-married male migrants are more likely to engage in commercial sex and unsafe sex than never-married non-migrant males, and their likelihood of engaging in unsafe sex was also higher than married male migrants. Although never-married male migrants were less likely to have multiple sex partners than married male migrants, they were more likely to have multiple sex partners and sex partners from different regions than never-married non-migrant males. These findings indicate that both migration and bachelorhood increase the risk of HIV/STDs infection for never-married male migrants, and migration also increases the risk of HIV/STDs transmission across populations and regions.
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Infecções por HIV , Infecções Sexualmente Transmissíveis , Migrantes , China/epidemiologia , Estudos Transversais , Infecções por HIV/epidemiologia , Humanos , Masculino , Trabalho Sexual , Comportamento SexualRESUMO
Objectives: HIV and sexually transmitted diseases (STDs) are serious health conditions among American Indian and Alaska Native (AIAN) populations, especially youth. However, few sexual risk reduction evidence-based interventions (EBIs) have been implemented by AIAN-serving organizations. This project sought to identify and assess the parameters facilitating the uptake and use of EBIs in order to strengthen opportunities for sustainability and improved sexual health among AIANs.Design: Guided by Rogers' theory of diffusion of innovation, we conducted a survey with a national sample of stakeholders involved with sexual health and well-being of AIAN youth (N = 142). We collected surveys for nine months beginning September 2010 and analyzed data in 2014 and 2015. We assessed respondents' perceptions of factors that might facilitate or hinder the use of a sexual risk reduction EBI, called RESPECT, in their communities. We regressed the scale of likely program uptake (alpha = 0.88) on each of five measures of perception of diffusion and uptake: trialability (extent new program can be altered), relative advantage (more advantageous than current program), observability (impact of program), complexity (difficulty of implementation), and compatibility (consistent with community values and practices).Results: Trialability (p = .009), observability (p = .003), and compatibility (p = .005) were found to be significantly related to program uptake in the adjusted model. Standardized betas showed that compatibility ranked highest of the three, followed by trialability and observability.Conclusions: For AIAN-serving organizations and AIAN communities, demonstrating trialability, compatibility, and observability of a sexual risk reduction EBI in specific cultural settings may increase likelihood of implementation and sustainability.
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Infecções por HIV , Indígenas Norte-Americanos , Infecções Sexualmente Transmissíveis , Adolescente , Infecções por HIV/prevenção & controle , Humanos , Infecções Sexualmente Transmissíveis/prevenção & controle , Indígena Americano ou Nativo do AlascaRESUMO
A cross-sector collaboration among a community-based organization, a prison arts program, and state departments of Public Health, Education, and Correction was established to address critical health education prevention efforts for at-risk high school-aged youth. The Tell Me What You See initiative utilizes artwork and poetry created by incarcerated youth to promote sexually transmitted disease (STD), HIV, and hepatitis prevention with students in public high schools and juvenile justice facilities. This innovative intervention integrates functional health knowledge and skills-based education through an art-based interdisciplinary approach reaching various populations of youth in multiple settings across a state. Evaluation results indicated that the materials effectively engage youth and open up a critical dialogue among peers and adults by addressing the role personal behavior can have in the prevention of STDs, hepatitis, and HIV. Lessons learned and recommendations are provided.
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Educação em Saúde , Infecções Sexualmente Transmissíveis , Adolescente , Adulto , Criança , Escolaridade , Promoção da Saúde , Humanos , Instituições Acadêmicas , Infecções Sexualmente Transmissíveis/prevenção & controleRESUMO
Although a growing body of literature has explored the association between religion and the prevalence of sexually transmissible infections (STIs), the focus has mainly been on HIV/AIDS and developing countries. Using data from the British National Surveys of Sexual Attitudes and Lifestyles (Natsal), we examine the direct association between religion and the prevalence of STIs including individual perception of exposure and risk of STIs. We focus on the importance of religion to respondents, religious affiliation as well as frequency of attendance to religious meetings. Our analyses suggest that being religious and frequently attending religious meetings are associated with lower odds of being diagnosed with STIs as well as lower self-assessed risk of getting HIV/AIDS. This seems particularly true for adherents of Christianity and more specifically, those of the Catholic denomination.
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Religião , Infecções Sexualmente Transmissíveis , Catolicismo , Cristianismo , Humanos , Prevalência , Comportamento Sexual , Infecções Sexualmente Transmissíveis/epidemiologia , Reino Unido/epidemiologiaRESUMO
Shigellosis outbreaks caused by Shigella with decreased susceptibility to azithromycin (DSA-Shigella) among men who have sex with men (MSM) have been reported worldwide. We describe sexual health indicators and antimicrobial drug resistance for shigellosis cases in Minnesota, USA. We analyzed a sample of isolates received during 2012-2015 and cross-referenced cases with the Minnesota Department of Health Sexually Transmitted Disease Database to ascertain patients' HIV status and recent chlamydia, gonorrhea, and syphilis infections. Of 691 Shigella isolates, 46 (7%) were DSA-Shigella; 91% of DSA-Shigella patients were men, of whom 60% were living with HIV. Among men, those with DSA-Shigella infection had greater odds of living with HIV, identifying as MSM, or having a recent diagnosis of a sexually transmitted disease. DSA-Shigella was associated with MSM, HIV infection, and recent sexually transmitted disease. To decrease spread of DSA-Shigella, interventions targeted at communities at high risk are needed.
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Disenteria Bacilar , Gonorreia , Infecções por HIV , Minorias Sexuais e de Gênero , Infecções Sexualmente Transmissíveis , Shigella , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Azitromicina/farmacologia , Farmacorresistência Bacteriana , Disenteria Bacilar/tratamento farmacológico , Disenteria Bacilar/epidemiologia , Feminino , Gonorreia/tratamento farmacológico , Gonorreia/epidemiologia , Infecções por HIV/tratamento farmacológico , Infecções por HIV/epidemiologia , Homossexualidade Masculina , Humanos , Masculino , Minnesota/epidemiologia , Infecções Sexualmente Transmissíveis/tratamento farmacológico , Infecções Sexualmente Transmissíveis/epidemiologiaRESUMO
PURPOSE: The goal of this study was to evaluate the effect of pubertal timing, and its interaction with prior childhood maltreatment, on the risk of cervical human papillomavirus (HPV) among sexually active adolescent minority female adolescents and young adults. METHODS: This cross-sectional study includes 842 adolescent girls and young women (aged 12 to 20 years; predominately Black and Hispanic) enrolled in an HPV vaccine surveillance study at a large adolescent health clinic in New York City between 2007 and 2016. Pubertal timing was assessed by self-reported age at menarche at baseline, with "early" and "late" defined as one standard deviation below (<11 years) or above (>13 years) the mean. Childhood exposure to abuse (sexual, physical and emotional) and neglect (physical and emotional) was assessed using the Childhood Trauma Questionnaire. Over 40 types of HPV infection were detected using the polymerase chain reaction in cervical Pap specimens. RESULTS: Results from multivariable logistic regression showed that early and late pubertal timing were marginally associated with a higher risk of HPV infection, adjusting for demographic and health covariates. Childhood maltreatment moderated the association between early pubertal timing and HPV infection: early pubertal timing was associated with a higher risk for HPV infection among maltreated girls (OR = 3.32, 95%CI:1.61-6.85), but not among non-maltreated girls (OR = 0.96, 95%CI:0.61-1.50; p-interaction<0.01). CONCLUSIONS: Variation in the timing of puberty and history of childhood maltreatment may have implications for adolescent sexual and reproductive health. Findings suggest that clinicians need to assess the biological and psychosocial risks in caring for youth.
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Maus-Tratos Infantis , Infecções por Papillomavirus , Adolescente , Criança , Estudos Transversais , Feminino , Humanos , Cidade de Nova Iorque , Infecções por Papillomavirus/epidemiologia , Puberdade , Adulto JovemRESUMO
BACKGROUND: Despite dual method (DM) contraception being effective in reducing repeat-births and sexually transmitted infections (STIs), Latinx adolescent parents who live in non-traditional migration areas remain vulnerable for both outcomes. OBJECTIVE: This study applied the Unified Theory of Behavior (UTB) and drew upon Bronfenbrenner's social ecological model to explore multiple stakeholders' (adolescent parents, caregivers, and nurses) perceptions of factors that influence DM intentions and use among Latinx adolescent parents. METHODS: Semi-structured interviews with Latinx adolescent parent-caregiver dyads and nurses were analyzed using thematic analysis. RESULTS: Study findings revealed that while all participant groups considered medical providers as DM influencers, contradicting views related to caregivers' as DM influencers emerged among adolescent parents and caregivers. Findings suggest that DM is deemed both acceptable and effective; and adolescent parents' reported DM self-efficacy. DM obstacles included negative emotions, environmental constraints, and poor knowledge and skills. CONCLUSIONS: Study results suggest that constructs from the UTB framework are useful in identifying individual and social factors that can potentially influence DM intentions and use among Latinx adolescent parents. IMPLICATIONS FOR PUBLIC HEALTH NURSING: This study's findings have potential implications for public health nurses interested in designing community-based interventions to reduce repeat-births and STIs among Latinx adolescent parents.
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Cuidadores/psicologia , Anticoncepção/estatística & dados numéricos , Hispânico ou Latino/psicologia , Enfermeiras e Enfermeiros/psicologia , Poder Familiar/etnologia , Pais/psicologia , Adolescente , Adulto , Cuidadores/estatística & dados numéricos , Feminino , Hispânico ou Latino/estatística & dados numéricos , Humanos , Masculino , Meio-Oeste dos Estados Unidos , Enfermeiras e Enfermeiros/estatística & dados numéricos , Pesquisa QualitativaRESUMO
OBJECTIVE: To evaluate the young adults' awareness of sexually transmitted diseases, complications, prevention and management. METHODS: The descriptive, cross-sectional study was conducted from September 4, 2017, to September 4, 2018, in Karachi, and comprised residents of the city aged 18-35 years of either gender. Data was collected from January 1 to March 31, 2018, using an online questionnaire. Data was analysed using SPSS 21. RESULTS: Of the 413 subjects, 245(59.3%) were females. The overall mean age was 24.7±4.76 years, and the mean household income was Rs2,18,294±205434. Of the total, 342(83%) had not heard the term 'sexually transmitted diseases'. Knowledge regarding transmission and complications of common sexually transmitted diseases was also low 293(56.4%). Leading source of sexual health knowledge was media 182(44%). Awareness levels differed significantly by age, educational level, field of study, occupation and educational level of the parents (p<0.05). CONCLUSIONS: There was deficiency in terms of knowledge and awareness regarding sexually transmitted diseases.
Assuntos
Saúde Sexual , Infecções Sexualmente Transmissíveis , Adolescente , Adulto , Estudos Transversais , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Masculino , Comportamento Sexual , Infecções Sexualmente Transmissíveis/epidemiologia , Adulto JovemRESUMO
OBJECTIVES: In many populations, men who have sex with men (MSM) are at a high risk of HIV infection. This study aimed to estimate the burden of HIV, other STIs and risk behaviours among Rwandan MSM. METHODS: In this cross-sectional study, we recruited through peer referral men aged between 18 and 60 years, who reported sex with men at least once in the 12 months prior to the survey. Representativeness was increased using 'seeds' from a variety of sources. Signed informed consent was obtained from all participants. Data on demographics, risk behaviours and self-reported STIs were collected through an interviewer-administered questionnaire. We screened all eligible participants for HIV using the Rwanda-approved protocol for rapid HIV detection. RESULTS: 504 MSM were recruited from five major cities in Rwanda. Participants were mostly young (median age 23 years, range 18-55 years) and unmarried (484/504, 96.0%). Thirteen per cent (65/504) of the participants reported past gonorrhoea and/or syphilis infection. Of 504 MSM, 53 (10.5%) reported they were diagnosed and treated for gonorrhoea in the past 12 months and 24 (4.8%) tested positive for HIV. A high proportion (232/504, 46%) reported receiving payment for sex by a man, with almost half of these reporting on more than three occasions (107/232, 46%). Many reported having had an HIV test within the past 12 months (385/504, 76.4%). In multivariate logistic regression models controlling for age, being paid for sex was associated with higher odds of past STI (OR 3.36 (1.82-6.43]; P<0.001) and testing HIV positive (OR 3.13, P<0.05). CONCLUSION: Further research is needed to understand the high rate of payment for sex in this population, which appears to be a major risk factor for STI including HIV.
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Infecções por HIV/epidemiologia , Soroprevalência de HIV , Minorias Sexuais e de Gênero , Infecções Sexualmente Transmissíveis/epidemiologia , Adolescente , Adulto , Estudos Transversais , Gonorreia/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Assunção de Riscos , Ruanda/epidemiologia , Autorrelato , Sífilis/epidemiologia , Adulto JovemRESUMO
Opioid use and the rising case reports of STDs represent co-occurring epidemics; research indicates that persons who inject drugs (PWID) may be at increased risk for acquiring STDs. We use the National Survey of Family Growth (NSFG, 2011-2015) to examine the prevalence of risky sexual behaviors and STD diagnoses among PWID. We describe demographic characteristics, sexual behaviors, and self-reported STD diagnoses of sexually active women and men, separately, by whether they had ever engaged in injection-related behaviors (age 15-44; Nâ¯=â¯9006 women, Nâ¯=â¯7210 men). Results indicate that in 2011-15, 1.4% of women and 2.6% of men reported ever engaging in injection-related behaviors. Examining the full logistic regression models indicate that for women, sex with a PWID in the past 12â¯months (AORâ¯=â¯5.8, 95% CI: 2.9, 11.7), exchanging money/drugs for sex in the past 12â¯months (AORâ¯=â¯3.6, 95% CI: 1.2, 10.9), chlamydia and/or gonorrhea diagnosis in the past 12â¯months (AORâ¯=â¯2.6, 95% CI: 1.2, 5.3), ever having a syphilis diagnosis (AORâ¯=â¯8.5, 95% CI: 3.1, 23.4), and ever having a herpes diagnosis (AORâ¯=â¯3.3, 95% CI: 1.0, 10.3) were associated with increased odds of engaging in injection-related behaviors. For men, sex with a PWID in the past 12â¯months (AORâ¯=â¯10.9, 95% CI: 4.3, 27.7), ever being diagnosed with syphilis (AORâ¯=â¯5.8, 95% CI: 1.8, 18.0), and ever being diagnosed with herpes (AORâ¯=â¯2.7, 95% CI: 1.0, 7.1) were significantly associated with increased odds of engaging in injection-related behaviors. Future research may examine critical intervention points, including co-occurring factors in both STD acquisition and injection drug use.
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Transtornos Relacionados ao Uso de Opioides/psicologia , Comportamento Sexual/psicologia , Comportamento Sexual/estatística & dados numéricos , Infecções Sexualmente Transmissíveis/epidemiologia , Infecções Sexualmente Transmissíveis/psicologia , Abuso de Substâncias por Via Intravenosa/psicologia , Adolescente , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Assunção de Riscos , Distribuição por Sexo , Abuso de Substâncias por Via Intravenosa/epidemiologia , Estados Unidos/epidemiologia , Adulto JovemRESUMO
The corpus cavernosum smooth muscle is important for both erection of the penis and for maintaining penile flaccidity. Most of the time, the smooth muscle cells are in a contracted state, which limits filling of the corpus sinuses with blood. Occasionally, however, they relax in a co-ordinated manner, allowing filling to occur. This results in an erection. When contractions of the corpus cavernosum are measured, it can be deduced that the muscle cells work together in a syncytium, for not only do they spontaneously contract in a co-ordinated manner, but they also synchronously relax. It is challenging to understand how they achieve this.In this review we will attempt to explain the activity of the corpus cavernosum, firstly by summarising current knowledge regarding the role of ion channels and how they influence tone, and secondly by presenting data on the intracellular Ca2+ signals that interact with the ion channels. We propose that spontaneous Ca2+ waves act as a primary event, driving transient depolarisation by activating Ca2+-activated Cl- channels. Depolarisation then facilitates Ca2+ influx via L-type voltage-dependent Ca2+ channels. We propose that the spontaneous Ca2+ oscillations depend on Ca2+ release from both ryanodine- and inositol trisphosphate (IP3)-sensitive stores and that modulation by signalling molecules is achieved mainly by interactions with the IP3-sensitive mechanism. This pacemaker mechanism is inhibited by nitric oxide (acting through cyclic GMP) and enhanced by noradrenaline. By understanding these mechanisms better, it might be possible to design new treatments for erectile dysfunction.
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Sinalização do Cálcio , Canais Iônicos/fisiologia , Músculo Liso/fisiologia , Pênis/fisiologia , Cálcio/fisiologia , Humanos , Masculino , Ereção PenianaRESUMO
The urethra is a muscular tube that extends from the bladder neck and is composed of an inner layer of smooth muscle referred to as the internal urethral sphincter and an outer layer of striated muscle which forms the external urethral sphincter. The smooth muscle layer can be separated into an inner layer of longitudinally orientated smooth muscle and an outer, relatively thinner, layer of circular muscle. Tonic contraction of both the smooth and striated muscle components of the urethra generates a urethral closure pressure which exceeds intravesical pressure in the bladder to maintain urinary continence. It is likely that contraction of urethral smooth muscle is involved in the long-term maintenance of tone, since it can achieve this at relatively low energy cost, whereas the striated muscle contributes more to the rise in urethral tone that accompanies increases in bladder pressure secondary to coughing or other sudden increases in intra-abdominal pressure. The level of urethral smooth muscle tone is regulated by several autonomic neurotransmitters, including noradrenaline, acetylcholine, ATP and nitric oxide. However, it is also clear that urethral smooth muscle is capable of generating significant tone in the absence of neural input. In this chapter we will discuss the mechanisms responsible for contraction of urethral smooth muscle, with specific focus on the role of ion channels and Ca2+ handling proteins to this process. The mechanisms underlying spontaneous activity in urethral interstitial cells (UICs), putative pacemaker cells of the urethra, will also be examined along with the modulation of these mechanisms by key excitatory and inhibitory neurotransmitters.
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Contração Muscular , Músculo Esquelético/fisiologia , Músculo Liso/fisiologia , Uretra/fisiologia , Humanos , Células Intersticiais de Cajal/fisiologia , Bexiga Urinária/fisiologiaRESUMO
BACKGROUND AND OBJECTIVES: Human papillomavirus (HPV) is the most prevalent etiological agent of viral sexually-transmitted infection. This study retrospectively evaluated the impact of a switch to a real-time PCR assay in the HPV prevalence and genotypes distribution by a quasi-experimental before-and-after approach. MATERIALS AND METHODS: In total, 1742 samples collected from 1433 patients were analyzed at the UOC Microbiology and Virology of Policlinico of Bari, Italy. HPV DNA detection was performed using initially nested PCR and subsequently multiplex real-time PCR assay. RESULTS: Statistically significant difference in HPV overall prevalence after the introduction of the real-time assay was not detected (48.97% vs. 50.62%). According to different extraction-DNA amplification methods, differences were observed in the prevalence rates of HPV-45, 68, 40, 42, and 43. The lowest prevalence for HPV-45 was observed in the Magna Pure-Real Time PCR group, while HPV-68, 40, 42, and 43 were less observed in the Qiagen-Real Time PCR group. After, a multivariate logistic regression, an increase in the prevalence of HPV-42 (aOR: 4.08, 95% CI: 1.71-9.73) was associated with the multiplex real-time PCR assay. CONCLUSIONS: Although this study is a not a direct comparison between two diagnostic methods because it has a sequential structure, it serves to verify the impact of a new molecular assay on HPV distribution. Moreover, the stability of HPV prevalence over time suggests that the population composition and the behavioral variables did not likely change during the observation period. Our study proposes that the introduction of a molecular test for HPV detection may be related to changes of HPV genotypes distribution.
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Reação em Cadeia da Polimerase Multiplex/normas , Infecções por Papillomavirus/virologia , Reação em Cadeia da Polimerase/normas , Humanos , Itália , Reação em Cadeia da Polimerase Multiplex/métodos , Reação em Cadeia da Polimerase Multiplex/estatística & dados numéricos , Papillomaviridae/genética , Reação em Cadeia da Polimerase/métodos , Reação em Cadeia da Polimerase/estatística & dados numéricos , Prevalência , Estudos RetrospectivosRESUMO
This article reviews the epidemiology, diagnosis, and management of common viral infections of the perianal skin and anorectum including herpes simplex virus, human immune deficiency virus, and molluscum contagiosum. Human papilloma virus infection is reviewed in the subsequent article.
RESUMO
BACKGROUND: Partner notification services (PNS) are recommended by the Centers for Disease Control and Prevention as a public health intervention for addressing the spread of HIV and other sexually transmitted diseases (STDs). Barriers and facilitators to the partner notification process from a public health perspective have not been well described. METHODS: In 2015, a coalition of New England public health STD directors and investigators formed to address the increasing STD prevalence across the region (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont) and to promote communication between state STD programs. To evaluate barriers and facilitators of PNS programs, a survey was administered to representatives from each state to describe PNS processes and approaches. RESULTS: Of the six PNS programs, Connecticut, Maine, Massachusetts, Vermont, and New Hampshire had combined HIV and STD PNS programs; Rhode Island's programs were integrated but employed separate disease intervention specialists (DIS). All states performed PNS for HIV and syphilis. Maine, New Hampshire and Vermont performed services for all gonorrhea cases. Rhode Island, Connecticut, and Massachusetts performed limited partner notification for gonorrhea due to lack of resources. None of the six states routinely provided services for chlamydia, though Maine and Vermont did so for high-priority populations such as HIV co-infected or pregnant individuals. Across all programs, clients received risk reduction counseling and general STD education as a component of PNS, in addition to referrals for HIV/STD care at locations ranging from Planned Parenthood to community- or hospital-based clinics. Notable barriers to successful partner notification across all states included anonymous partners and index cases who did not feel comfortable sharing partners' names with DIS. Other common barriers included insufficient staff, inability of DIS to identify and contact partners, and index cases declining to speak with DIS staff. CONCLUSIONS: In New England, state health departments use different strategies to implement PNS programs and referral to STD care. Despite this, similar challenges exist across settings, including difficulty with anonymous partners and limited state resources.