Assessment of Community Awareness and Screening of Chagas Disease in the Latin American Community of Greater New Orleans.

Chagas disease is a public health problem in the Americas, from the southern United States (USA) to Argentina. In the USA, less than 1% of domestic cases have been identified and less than 0.3% of total cases have received treatment. Little is known about affected immigrant Latin American communities. A prospective study was conducted to assess knowledge about Chagas disease among the Latin American community living in the Greater New Orleans area. Participants answered a baseline questionnaire, viewed a short educational video presentation, completed a post-presentation questionnaire, and were screened with an FDA-approved blood rapid diagnostic test (RDT). A total of 154 participants from 18 Latin American countries (n = 138) and the USA (n = 16) were enrolled and screened for Trypanosoma cruzi infection. At baseline, 57% of the participants knew that Chagas disease is transmitted through an insect vector, and 26% recognized images of the vector. Following the administration of an educational intervention, the participants' knowledge regarding vector transmission increased to 91% and 35% of participants were able to successfully identify images of the vector. Five participants screened positive for T. cruzi infection, indicating a 3.24% [95%CI: 1.1-7.5%] prevalence of Trypanosoma cruzi infection within the Latin American community of the New Orleans area. Results highlight the urgent need for improving access to education and diagnostics of Chagas disease.

Modeling Sustained Transmission of Wolbachia among Anopheles Mosquitoes: Implications for Malaria Control in Haiti.

Wolbachia infection in Anopheles albimanus mosquitoes can render mosquitoes less capable of spreading malaria. We developed and analyzed a mechanistic compartmental ordinary differential equation model to evaluate the effectiveness of Wolbachia-based vector control strategies among wild Anopheles mosquitoes in Haiti. The model tracks the mosquito life stages, including egg, larva, and adult (male and female). It also accounts for critical biological effects, such as the maternal transmission of Wolbachia through infected females and cytoplasmic incompatibility, which effectively sterilizes uninfected females when they mate with infected males. We derive and interpret dimensionless numbers, including the basic reproductive number and next-generation numbers. The proposed system presents a backward bifurcation, which indicates a threshold infection that needs to be exceeded to establish a stable Wolbachia infection. The sensitivity analysis ranks the relative importance of the epidemiological parameters at baseline. We simulate different intervention scenarios, including prerelease mitigation using larviciding and thermal fogging before the release, multiple releases of infected populations, and different release times of the year. Our simulations show that the most efficient approach to establishing Wolbachia is to release all the infected mosquitoes immediately after the prerelease mitigation process. Moreover, the model predicts that it is more efficient to release during the dry season than the wet season.

Detection of HIV Virologic Failure and Switch to Second-Line Therapy: A Systematic Review and Meta-analysis of Data From Sub-Saharan Africa.

Background: The late recognition of virologic failure (VF) places persons with HIV in Sub-Saharan Africa at risk for HIV transmission, disease progression, and death. We conducted a systematic review and meta-analysis to determine if the recognition and response to VF in the region has improved. Methods: We searched for studies reporting CD4 count at confirmed VF or at switch to second-line antiretroviral therapy (ART). Using a random-effects metaregression model, we analyzed temporal trends in CD4 count at VF-or at second-line ART switch-over time. We also explored temporal trends in delay between VF and switch to second-line ART. Results: We identified 26 studies enrolling patients with VF and 10 enrolling patients at second-line ART switch. For studies that enrolled patients at VF, pooled mean CD4 cell count at failure was 187 cells/mm3 (95% CI, 111 to 263). There was no significant change in CD4 count at confirmed failure over time (+4 cells/year; 95% CI, -7 to 15). Among studies that enrolled patients at second-line switch, the pooled mean CD4 count was 108 cells/mm3 (95% CI, 63 to 154). CD4 count at switch increased slightly over time (+10 CD4 cells/year; 95% CI, 2 to 19). During the same period, the mean delay between confirmation of VF and switch was 530 days, with no significant decline over time (-14 days/year; 95% CI, -58 to 52). Conclusions: VF in Africa remains an event recognized late in HIV infection, a problem compounded by ongoing delays between VF and second-line switch.

Uncertainty and Posttraumatic Stress: Differences Between Mothers and Fathers of Infants with Disorders of Sex Development.

Parents of children with disorders of sex development (DSD) report significant psychological distress, including posttraumatic stress symptoms (PTSS), with mothers consistently reporting higher rates of psychological distress than fathers. However, psychological factors contributing to PTSS in both parents are not well understood. The present study sought to fill this gap in knowledge by examining PTSS and illness uncertainty, a known predictor of psychological distress, in parents of children recently diagnosed with DSD. Participants were 52 mothers (Mage = 32.55 years, SD = 5.08) and 41 fathers (Mage = 35.53 years, SD = 6.78) of 53 infants (Mage = 9.09 months, SD = 6.19) with DSD and associated atypical genital development. Participants were recruited as part of a larger, multisite study assessing parents' psychosocial response to their child's diagnosis of DSD. Parents completed measures of illness uncertainty and PTSS. Mothers reported significantly greater levels of PTSS, but not illness uncertainty, than fathers, and were more likely than fathers to report clinical levels of PTSS (21.2% compared to 7.3%). Hierarchical regression revealed that parent sex, undiagnosed or unclassified DSD status, and illness uncertainty were each associated with PTSS. The overall model accounted for 23.5% of the variance associated with PTSS. Interventions targeting illness uncertainty may be beneficial for parents of children with newly diagnosed DSD.

Parent-Rated Severity of Illness and Anxiety among Caregivers of Children Born with a Disorder of Sex Development Including Ambiguous Genitalia.

BACKGROUND/AIMS: Parents of children born with disorders of sex development (DSD) often experience anxiety, but risk factors, including parental perception of the severity of their child's DSD, have not been examined. We hypothesized that severity of illness (SOI) ratings would relate to parental anxiety, and would be higher for parents of children with a potentially life-threatening DSD (e.g., 21-hydroxylase deficiency). METHODS: Eighty-nine parents (Mage = 33.0, 56.2% mothers) of 51 children (Mage in months = 8.7) with a DSD including ambiguous genitalia were recruited from 12 specialized DSD clinics. Parents completed questionnaires prior to genitoplasty, 6 months post-genitoplasty, and 12 months post-genitoplasty (if completed). Data were analyzed with linear mixed modeling. RESULTS: Parental anxiety decreased over time, χ2(1) = 10.14, p < 0.01. A positive relationship between SOI and anxiety was found, with SOI being a strong predictor of anxiety (b = 0.53, p < 0.01; χ2[1] = 5.33, p < 0.05). An SOI by time interaction indicated SOI had an increasing effect on anxiety over time, b = 0.06, p < 0.05; χ2(1) = 6.30, p < 0.05. There was no diagnosis by SOI interaction. CONCLUSION: Parental anxiety decreased over time, but those with higher SOI ratings reported greater initial anxiety followed by slower resolution over time. Underlying etiology of DSD had no effect on the relationship between SOI and anxiety.

Antimicrobial resistance in West Africa: a systematic review and meta-analysis.

Growing data suggest that antimicrobial-resistant bacterial infections are common in low- and middle-income countries. This review summarises the microbiology of key bacterial syndromes encountered in West Africa and estimates the prevalence of antimicrobial resistance (AMR) that could compromise first-line empirical treatment. We systematically searched for studies reporting on the epidemiology of bacterial infection and prevalence of AMR in West Africa within key clinical syndromes. Within each syndrome, the pooled proportion and 95% confidence interval were calculated for each pathogen-antibiotic pair using random-effects models. Among 281 full-text articles reviewed, 120 met the eligibility criteria. The majority of studies originated from Nigeria (70; 58.3%), Ghana (15; 12.5%) and Senegal (15; 12.5%). Overall, 43 studies (35.8%) focused on urinary tract infections (UTI), 38 (31.7%) on bloodstream infections (BSI), 27 (22.5%) on meningitis, 7 (5.8%) on diarrhoea and 5 (4.2%) on pneumonia. Children comprised the majority of subjects. Studies of UTI reported moderate to high rates of AMR to commonly used antibiotics including evidence of the emergence of cephalosporin resistance. We found moderate rates of AMR among common bloodstream pathogens to typical first-line antibiotics including ampicillin, cotrimoxazole, gentamicin and amoxicillin/clavulanate. Among S. pneumoniae strains isolated in patients with meningitis, levels of penicillin resistance were low to moderate with no significant resistance noted to ceftriaxone or cefotaxime. AMR was common in this region, particularly in hospitalized patients with BSI and both outpatient and hospitalized patients with UTI. This raises concern given the limited diagnostic capability and second-line treatment options in the public sector in West Africa.

Linking the degree of virilization in females with congenital adrenal hyperplasia to genotype.

Mutations of CYP21A2 variably decrease 21-hydroxylase activity and result in a spectrum of disease expressions in patients with congenital adrenal hyperplasia (CAH). We examined the association between CYP21A2 mutations and virilization (Prader score) in females with CAH. The study population included 187 CAH females with fully characterized CYP21A2 mutations. One hundred fifty-eight patients were sorted into groups by expected enzyme activity (percent of normal activity) of the less severely affected allele: (A) null, 0%; (B) I2G, 1%; (C) I172N, 2%; and (D) V281L, >2%. We observed an inverse relationship between virilization and residual enzyme activity (P < 0.001). Subjects in group A or B had a significantly higher likelihood (unadjusted odds ratio: 16; P < 0.001) of developing severe virilization compared with those in group C. Surprisingly, 24% of group D patients, whose mutation is usually associated with nonclassical (NC) CAH, had severe virilization. Among subjects with the NC P30L mutation, 66% expressed unexpected virilization. Virilization, usually leading to extensive reconstructive surgery, is highly likely in patients with null or I2G mutations; however, NC mutations (P30L/V281L) may also lead to unexpected virilization. These findings have implications for prenatal counseling and highlight the need for additional investigations into other factors that influence virilization in CAH.

Urinary continence outcomes following vaginoplasty in patients with congenital adrenal hyperplasia.

BACKGROUND: Feminizing genitoplasty techniques have diversified to encompass the spectrum of atypical genitalia in 46,XX congenital adrenal hyperplasia (CAH) patients. However, long-term outcomes evaluating postoperative continence following complex vaginoplasty remain scarce. OBJECTIVE: The aim was to review our surgical experience and assess postoperative urinary continence outcomes in CAH patients following complex, primary vaginoplasty. STUDY DESIGN: We retrospectively reviewed CAH patients who underwent complex, primary vaginoplasty at a single center by a single surgeon from 1996 to 2013. We collected data on clinical characteristics, surgical techniques and postoperative urinary continence outcomes. In patients who had reached toilet-training age, continence outcomes were reviewed. RESULTS: Twenty-four patients met the inclusion criteria. The median age at the time of surgery was 8 months (interquartile range [IQR] 1 year-6 months). The median length of follow up was 6 years (IQR 10 years-3 years). These patients required complex reconstruction because of more extensive virilization: total urogenital mobilization (TUM, 10), pull-through vaginoplasty (9), partial urogenital mobilization (3), or pull-through vaginoplasty with partial urogenital mobilization (2). After surgery, 15 out of 24 (62.5%) reported age appropriate toilet-training without further complaints. Seven (29.2%) patients reported daytime incontinence or enuresis that resolved with conservative management. Two patients reported day and night incontinence requiring urethral bulking procedures following TUM. DISCUSSION: Twenty-two (91.7%) of our patients achieved continence without further surgical intervention. Of these patients, the TUM patients had serious incontinence issues. Our study represents a review of clinically significant cases from the female CAH population. The limitations of our study include a relatively small sample size and retrospective design. CONCLUSION: Females with CAH and urogenital virilization most often achieved age appropriate toilet-training following vaginoplasty. Daytime incontinence and enuresis resolved without operative management in the vast majority of cases. TUM carries a risk of severe incontinence and may require further procedures to achieve urinary continence.

Nerve Sparing Clitoroplasty is an Option for Adolescent and Adult Female Patients with Congenital Adrenal Hyperplasia and Clitoral Pain following Prior Clitoral Recession or Incomplete Reduction.

PURPOSE: In the past many female patients with congenital adrenal hyperplasia and atypical genitalia were surgically treated with clitoral recession or incomplete reduction of erectile bodies. We report the results of repeat clitoral surgery performed for clitoral pain or enlargement using a nerve sparing reduction clitoroplasty technique. MATERIALS AND METHODS: We identified 6 female patients with congenital adrenal hyperplasia who had undergone prior clitoral recession or incomplete reduction elsewhere. They then presented to our center with clitoral pain or enlargement, where they were treated with nerve sparing clitoroplasty between 2000 and 2010. We collected patient reported data relating to clitoral sensation and sexual function outcomes. RESULTS: Mean ± SD age at evaluation for repeat clitoral surgery was 21 ± 7 years and mean age at clitoroplasty was 22 ± 8 years. Median postoperative followup was 9 months (IQR 32-6). All patients showed improvement with resolution of clitoral pain or enlargement. CONCLUSIONS: Clitoral pain and enlargement upon arousal can be a major concern for women with clitoromegaly and congenital adrenal hyperplasia after clitoral recession is performed. Our series suggests that clitoral recession or incomplete reduction in childhood may be an inadequate initial solution in the congenital adrenal hyperplasia population due to the potential for future androgen elevation and the possibility of later symptom development. In addition we found that patients may be successfully treated with nerve sparing clitoroplasty, resulting in resolution of pain and ability to engage in sexual activity.