Importance of high IgG anti-Toxoplasma gondii titers and PCR detection of T. gondii DNA in peripheral blood samples for the diagnosis of AIDS-related cerebral toxoplasmosis: a case-control study

BackgroundCerebral toxoplasmosis (CT) continues to cause significant morbidity and mortality in human immunodeficiency virus (HIV)-infected patients in Brazil. In clinical practice, the initial diagnosis is usually presumptive and alternative diagnosis tools are necessary. Our objective was to evaluate whether the detection of high titers of IgG anti-Toxoplasma gondii and T. gondii DNA in blood samples are associated with the diagnosis of CT.MethodsIn this case-control study we included 192 patients with HIV-1 infection: 64 patients with presumptive CT (cases) and 128 patients with other diseases (controls). Blood samples to perform indirect immunofluorescense reaction (IFI) to detect anti-T. gondii IgG antibodies and polymerase chain reaction (PCR) were collected before or within the first three days of anti-Toxoplasma therapy. Two multivariate logistic regression models were performed: one including the variable qualitative serology and another including quantitative serology.ResultsIn the first model, positive IgG anti-T. gondii (OR 4.7, 95% CI 1.2-18.3; p = 0.027) and a positive T. gondii PCR result (OR 132, 95% CI 35-505; p < 0.001) were associated with the diagnosis. In the second model, IgG anti-T. gondii titres ≥ 1:1024 (OR 7.6, 95% CI 2.3-25.1; p = 0.001) and a positive T. gondii PCR result (OR 147, 95% CI 35-613; p < 0.001) were associated with the diagnosis.ConclusionsQuantitative serology and molecular diagnosis in peripheral blood samples were independently associated with the diagnosis of CT in HIV-infected patients. These diagnostic tools can contribute to a timely diagnosis of CT in settings where Toxoplasma infection is common in the general population.     

Congenital toxoplasmosis in a reference center of Paraná, Southern Brazil

This study describes the characteristics of 31 children with congenital toxoplasmosis children admitted to the University Hospital of Londrina, Southern Brazil, from 2000 to 2010. In total, 23 (85.2%) of the mothers received prenatal care but only four (13.0%) were treated for toxoplasmosis. Birth weight was <2500 g in 37.9% of the infants. During the first month of life, physical examination was normal in 34.5%, and for those with clinical signs and symptoms, the main manifestations were hepatomegaly and/or splenomegaly (62.1%), jaundice (13.8%), and microcephaly (6.9%). During ophthalmic examination, 74.2% of the children exhibited injuries, 58.1% chorioretinitis, 32.3% strabismus, 19.4% microphthalmia, and 16.2% vitreitis. Anti-Toxoplasma gondii IgM antibodies were detected in 48.3% of the children. Imaging brain evaluation was normal in 44.8%; brain calcifications, hydrocephaly, or both conditions were observed in 27.6%, 10.3%, and 17.2%, respectively, of the patients. Patients with cerebrospinal fluid protein ≥ 200 mg/dL presented more brain calcifications (p = 0.0325). Other sequelae were visual impairment (55.2% of the cases), developmental delay (31.0%), motor deficit (13.8%), convulsion (27.5%), and attention deficit (10.3%). All patients were treated with sulfadiazine, pyrimethamine, and folinic acid, and 55.2% of them exhibited adverse effects. The results demonstrate the significance of the early diagnosis and treatment of toxoplasmosis during pregnancy to reduce congenital toxoplasmosis and its consequences.     

Toxoplasma gondii antibody profile in HIV-1-infected and uninfected pregnant women and the impact on congenital toxoplasmosis diagnosis in Rio de Janeiro, Brazil

ObjectiveCompare the anti-T. gondii IgG titer between HIV-1 infected and non HIV-1 infected pregnant women and report three cases of congenital toxoplasmosis resulting from reactivation of infection during pregnancy of HIV-1 infected women.MethodsThis study was conducted among 2,270 pregnant women with chronic Toxoplasma gondii infection (absence of IgM and presence of IgG), including 82 HIV-1 infected and 2,188 non-infected women.ResultsThe average anti-T. gondii IgG titer was 127 for the 2,188 non-HIV-1 infected women, and 227 for the 82 HIV-1-infected women (p = 0,007). These results suggested that higher anti-T. gondii IgG titers in HIV-1-infected pregnant women may not be indicative of an elevated risk for fetal infection. In this study three cases of congenital toxoplasmosis that resulted from infection reactivation during pregnancy of HIV-1-infected women were manifested by fetal death, symptomatic infection, and infant without symptoms, respectively. In two of these women, a ten-fold increase in IgG levels above used cutoff was observed (2,320 UI/mL and 3,613 UI/mL, respectively). In the third pregnant women anti-T. gondii IgG titers during pregnancy did not rise despite the occurrence of congenital toxoplasmosis (204; 198; 172 UI/mL).ConclusionsCongenital toxoplasmosis resulting reactivation of infection during pregnancy in the studied group leads us to believe that it is a public health problem, especially in our population, in which seroprevalence of T. gondii infections is high. These findings also suggest that special attention is necessary during pregnancy, because the serologic diagnosis may not be indicative of toxoplasmosis reactivation.     

HLA-B*14 allele predicts HIV-1 mother-to-child-transmission,in Salvador,Brazil

BackgroundClass I human leukocyte antigens, especially the molecules encoded at the B locus (HLA-B), are associated with AIDS progression risk. Different groups of HLA-B alleles have been associated to a protective effect or increasing susceptibility to HIV infection and are expressed from the earliest stages of gestation.ObjectiveThe aim of this study was to evaluate which variants of HLA-B are associated with the risk of HIV vertical transmission in infected pregnant women and in their offspring, in a referral center in Salvador Bahia.MethodsWe performed HLA-B genotyping in 52 HIV-infected mothers and their children exposed to HIV-1 during pregnancy (N = 65) in Salvador, Brazil. We compared the HLA-B alleles frequency in mothers, uninfected and infected children, according to the use of antiretroviral prophylaxis.ResultsAbsence of antiretroviral antenatal and postnatal prophylaxis was significantly associated with vertical transmission of HIV-1 (p = <0.01, and p = <0.01 respectively). Frequency of HLA-B*14 (29.2%, p = 0.002), HLA-B*18 (16.7%, p = 0.04) or HLA-B*14:1 (20.8%, p = 0.01) alleles subgroups were significantly higher in HIV-1 infected children and persisted (HLA-B*14, p = 0.04) even after adjusting for use of antiretroviral prophylaxis. No significant difference in expression of HLA-B alleles was observed among mothers who transmitted the virus compared to those who did not.ConclusionsExpression of HLA-B*14 allele in children exposed to HIV-1 is predictive of vertical transmission and reinforces the important role of genetics in mother-to-child transmission.     

Profile of drug–drug interactions and impact on the effectiveness of antiretroviral therapy among patients living with HIV followed at an Infectious Diseases Referral Center in Belo Horizonte,Brazil

HIV infection may be considered a chronic condition for people living with HIV with access to antiretrovirals and this has effectively increased survival. Moreover, this has also facilitated the emergence of other comorbidities increasing the risk for drug–drug interactions and polypharmacy. The profile of these interactions as well as their consequences for people living with HIV are still not completely elucidated. The objectives of this study were to describe the profile of these interactions, their prevalence and their classification according to the potential for significant or non-significant drug–drug interactions. From June 2015 to July 2016, people living with HIV on follow-up at an Infectious Diseases Referral Center in Belo Horizonte, Brazil have been investigated for the presence of drug–drug interactions. A total of 304 patients were included and the majority (75%) had less than 50 years of age, male (66.4%), and 37.8% self-defined as brown skinned. Approximately 24% were on five or more medications and half of them presented with drug–drug interactions. Patients older than 50 years had a higher frequency of antiretrovirals drug–drug interactions with other drugs compared to younger patients (p = 0.002). No relationship was found between the number of drug–drug interactions and the effectiveness of antiretrovirals. As expected, the higher the number of non-HIV medications used (OR = 1.129; 95%CI 1.004–1.209; p = 0.04) was associated with an increase in drug–drug interactions. The high prevalence of drug–drug interactions found and the data collected should be useful to establish measures of quaternary prevention and to increase the medication security for people living with HIV.     

Pneumocystis jirovecii pneumonia in children. A retrospective study in a single center over three decades

IntroductionPneumocystis jirovecii pneumonia (PJP) is a life-threatening condition in immunocompromised children. Our aim is to analyze the epidemiologic and clinical characteristics of PJP cases in our setting, describing the prognosis and related risk factors.MethodsRetrospective study including all pediatric patients (≤18 years) with PJP admitted to our hospital (January 1989–December 2016). Case definition: patient with acute pneumonitis and P. jirovecii detection in bronchoalveolar lavage or tracheal aspirate using methenamine silver or direct antibody fluorescence staining, or Real-Time Polymerase Chain Reaction.ResultsTwenty-five cases (0.9 cases/year) were identified. Median age was 2.2 years (interquartile range: 0.5–12.3), 64% were male, and 12% were receiving appropriate antimicrobial prophylaxis. Cytomegalovirus coinfection was detected in 26% cases. The most common underlying diseases were primary immunodeficiencies (36%) and 16% were human immunodeficiency virus (HIV)-infected children. Eighteen were admitted to the pediatric intensive care unit (PICU) and overall 30-day mortality was 20% (31.25% in HIV non-infected vs 0% in HIV-infected patients; OR: 0.33, 95% CI: 0.02–7.24, p = 0.55). Clinical outcome was worse in girls and those patients requiring adjuvant steroid therapy. HIV non-infected patients, higher initial LDH, younger age and shorter time elapsed between diagnosis of PJP and the underlying disease were identified as risk factors to be admitted to the PICU (p = 0.05, p = 0.026, p = 0.04 and p = 0.001 respectively).ConclusionAccompanying the widespread use of combined antiretroviral therapy, PJP has been diagnosed almost exclusively in HIV non-infected children at our institution. Moreover, significant higher morbidity rates associated with PJP are seen in this group of patients.     

Prevalence of metabolic syndrome assessed by IDF and NCEP ATP 111 criteria and determinants of insulin resistance among HIV patients in the Eastern Cape Province of South Africa

AimsTo determine the prevalence of metabolic syndrome (MS) and insulin resistance (IR) and their determinants in HIV on ART, ART naive HIV and HIV negative patients.MethodsCross sectional study. ART experienced HIV, ART naive HIV and HIV negative patients were compared for differences in prevalence of MS and IR. Determinants of MS and IR were assessed.ResultsPrevalence of MS by NCEP criteria was 26.6%, 15.7% and 21.9% (P = 0.3) respectively for HIV on ART, ART naive HIV and HIV negative groups. The MS rates with the IDF definition were 22.7%, 23.2% and 19.3% (P = 0.8) for HIV on ART, ART naive HIV and HIV negative patients respectively. Increased waist circumference by IDF criteria (P = 0.03), visceral to subcutaneous fat ratio (P = 0.049), hypertriglyceredemia (P < 0.001) and high LDL-Cholesterol (P < 0.001) were more common in HIV patients on ART than other groups. IR was found in 12.8%, 3.6% and 2.4% (P = 0.003) of HIV on ART, ART naive HIV and HIV negative groups respectively. Male gender (odds ratio (OR) 11 95% CI 3–48; P < 0.001) was independently associated with MS. HIV patients on ART (OR 6.6 95% CI 1.3–32.3; P = 0.020), IDF definition of MS (OR 3.4 95% CI 1.1–10.7; P = 0.040), NCEP definition of MS (OR 3.2 95% CI 1.01–10.3; P = 0.049) and low HDL-Cholesterol (OR 5.7 95% CI 1.2–27; P = 0.029) were independently associated with IR.ConclusionPrevalence of MS with IDF and NCEP definitions was similar across groups. HIV patients on ART and MS were independently associated with IR while male gender was independently associated with MS.     

Syphilis and HIV-1 among parturient women in Salvador,Brazil: low prevalence of syphilis and high rate of loss to follow-up in HIV-infected women

BackgroundThe occurrence of syphilis and HIV-1 infections during pregnancy are major risks to the fetus due to mother-to-child transmission (MTCT).ObjectivesTo determine peripartum seroprevalence and risk factors of syphilis and HIV-1 infection among pregnant women in Salvador, Brazil, and the rate of HIV-1 MTCT.MethodsCross-sectional study of pregnant women who were admitted for delivery in a reference maternity hospital between May 2008 and March 2009 was conducted. Women were screened for HIV-1 infection and syphilis, and interviewed regarding demographic, behavioral and obstetric data. Newborns to HIV-infected mothers were tested by b-DNA and DNA-PCR to detect HIV-1.ResultsA total 3300/8516 women were evaluated. Mean age was 25.8 ± 7.3 years. HIV-1 and syphilis seroprevalence rates were 0.84% (28/3300) and 0.51% (17/3300), respectively. HIV-1 infection was associated with: low education (p = 0.04), having a partner with known HIV infection (p < 0.0001) or with previous sexually transmitted infection (p < 0.0001), blood transfusion (p = 0.003), or accidental exposure to blood (p = 0.003). Syphilis was associated with being Caucasian (p = 0.02), having no steady partner (p = 0.02), being a housewife (p = 0.01), having an intravenous drug user (IVDU) sexual partner (p = 0.04) or a sexual partner with previous STI (p < 0.001). Higher education (p = 0.04) was protective against HIV-infection. Attending a prenatal care program was protective against syphilis (p = 0.008) and HIV-1 (p = 0.02). No case of HIV-1 MTCT was detected, but 25% of children born to HIV-infected mothers were lost to follow up.ConclusionsIn Salvador, peripartum prevalence of syphilis and HIV-1 infection among pregnant women were low, and associated with classic risk factors for both infections. The great proportion of very late diagnosis of HIV infection, and the high rate of loss of follow-up among positive mothers and their infants are of high concern.     

Trichomonas vaginalis and associated factors among women living with HIV/AIDS in Amazonas,Brazil

ObjectivesOur goal was to determine the prevalence of Trichomonas vaginalis and its associated factors among women living with HIV attending an AIDS clinic in Manaus, Amazonas, Brazil.MethodsCross-sectional study among women attending an AIDS clinic in Manaus between March and December 2010 for gynecological examination were invited to participate. Enrolled patients answered a face-to-face interview including demographic, behavioral and clinical data. They also underwent a gynecological evaluation and cervical scrape samples were collected for wet mount, Gram stain, culture and cytological analysis. A blood sample was obtained to determine TCD4+ lymphocytes and viral load.ResultsA total of 341 (91.2%) women participated in the study. The prevalence of T. vaginalis was 4.1% (95% CI: 2.0–6.2%). Median age was 32 (interquartile range 27–38) years and median years of schooling was 9.0 (interquartile range 4–11). A total of 165 (53.2%) HIV women were classified as patients with AIDS. In multivariate analyses, squamous intraepithelial lesions in cytology [OR = 2.46 (95% CI: 1.31–4.63, p = 0.005)] and anal sex practice [OR = 3.62 (95% CI: 1.08–12.19, p = 0.037)] were associated with T. vaginalis.ConclusionsThese results highlight that HIV-infected women should be screened for T. vaginalis. The control of this infection may have an impact on preventing reproductive complications among these women.     

Central nervous system infection following allogeneic hematopoietic stem cell transplantation

Objective/backgroundHere, we described the clinical characteristics and outcomes of central nervous system (CNS) infections occurring after allogeneic hematopoietic stem cell transplantation (allo-HSCT) in a single institution over the previous 6 years.MethodsCharts of 353 consecutive allogeneic transplant recipients were retrospectively reviewed for CNS infection.ResultsA total of 17 cases of CNS infection were identified at a median of 38 days (range, 10–1028 days) after allo-HSCT. Causative pathogens were human herpesvirus-6 (n = 6), enterococcus (n = 2), staphylococcus (n = 2), streptococcus (n = 2), varicella zoster virus (n = 1), cytomegalovirus (n = 1), John Cunningham virus (n = 1), adenovirus (n = 1), and Toxoplasma gondii (n = 1). The cumulative incidence of CNS infection was 4.1% at 1 year and 5.5% at 5 years.ConclusionMultivariate analysis revealed that high-risk disease status was a risk factor for developing CNS infection (p = .02), and that overall survival at 3 years after allo-HSCT was 33% in patients with CNS infection and 53% in those without CNS infection (p = .04).     

Dyslipidemia and fasting glucose impairment among HIV patients three years after the first antiretroviral regimen in a Brazilian AIDS outpatient clinic

ObjectiveTo evaluate the cumulative incidence of dyslipidemia and fasting glucose impairment three years after initiating the first antiretroviral (ART) regimen and the association with the type of ART regimen in an AIDS outpatient clinic in Brazil.MethodsRetrospective cohort of HIV-1 infected patients attending an outpatient HIV clinic in Vitoria, Brazil, between January/2010 and May/2011. Data, including blood pressure, dyslipidemia (high total cholesterol and low HDL-C), fasting glucose, and cardiovascular risk by Framingham Risk Score were abstracted from medical records from clinic visits six months prior and three years after starting ART. We assessed independent associated factors for dyslipidemia using multiple logistic regression.ResultsFour hundred and ninety-eight patients on ART were studied. Median age was 45 years (interquartile range (IQR): 37–52), and median time since HIV diagnosis was 7.7 years (IQR: 3.8–10.0). The proportion of patients with dyslipidemia was 22.3% (95% CI: 18.6–25.9%) 36 months after ART initiation. Triglycerides levels >150 mg/dL (55.2% vs. 25.4%, p = 0.021) and high fasting glucose (5.8% vs. 2.3%, p = 0.034) were diagnosed more frequently after ART use when compared to baseline values. Multiple logistic regression analysis has shown dyslipidemia to be associated with lopinavir/r use [OR = 1.74 (95% CI: 1.12–2.86)].ConclusionThese data show high chance of dyslipidemia after initiation of ART. Long-term follow-up will help identify the impact of ART on cardiovascular risk.     

Diarrhea in children less than two years of age with known HIV status in Kisumu,Kenya

ObjectiveTo compare the frequency and etiology of diarrhea in children aged less than 2 years with known HIV status.MethodsThis was a nested cohort study, whereby children were followed during monthly routine and unscheduled visits. The HIV status of children was determined with PCR. A stool culture was obtained from children with diarrhea. A subset of stool samples was examined for parasites and tested for rotavirus.ResultsBetween 1997 and 2001, 682 children (51.0% male) contributed observation periods with a mean of 47 weeks. Overall there were 198 episodes of diarrhea per 100 child-years of observation (CYO); diarrhea was more common among HIV-positive children than among HIV-negative children (321 vs. 183 episodes/100 CYO, respectively, p < 0.01) and was not statistically different for HIV-negative children born to HIV-positive compared with HIV-negative mothers (182 vs. 187 episodes/100 CYO, respectively, p = 0.36). For 66.5% of the acute episodes a stool culture was obtained; 27.8% of stool cultures yielded a bacterial pathogen. A positive stool culture was less likely among HIV-positive children compared to children of HIV-negative mothers (20.5% vs. 34.3%, p = 0.01). Susceptibility of Salmonella and Shigella to commonly used antibiotics was low. Rotavirus was detected in 13.9% of 202 examined stool samples, and a stool parasite in 3.8% of 394 samples. Diarrhea was associated with 37.8% of child deaths.ConclusionsDiarrhea was more common among HIV-infected children, but was not associated with specific bacterial pathogens. Measures that reduce diarrhea will benefit all children, but may benefit HIV-infected children in particular.     

Detection of Toxoplasma gondii oocysts in different water resources by Loop Mediated Isothermal Amplification (LAMP)

Human toxoplasmosis is potentially contracted due to consumption of contaminated drinking water and represents an increasing public health risk worldwide. Toxoplasma gondii oocysts can be resistant to standard disinfection processes, including UV radiation. Increased awareness of the risk of waterborne toxoplasmosis outbreaks has led to an increase in research interest in the detection of oocysts in environmental water systems. Ninety-five environmental water samples from the Lower Rhine area in Germany have been included in the study and examined for the presence of Toxoplasma. Water samples were filtered or flocculated by aluminum sulfate and purified by sucrose density gradient. DNA was then extracted, and the DNA samples were then examined by LAMP analysis. T. gondii DNA was detected in eight out of 83 (9.6%) influent and effluent samples obtained from wastewater treatment plants. All samples (n = 12) from the surface, ground, raw and tap waters tested negative. The purpose of this work was to investigate the occurrence and distribution of Toxoplasma oocysts on the Lower Rhine in Germany. Our study provides evidence that the assay is a sensitive, specific, rapid and cost effective method for the detection of T. gondii and is useful for both the investigations of cases of waterborne outbreaks and for identifying the source of contamination.     

Outcome of tracheostomy after pediatric cardiac surgery

ObjectiveTo investigate the incidence, timing indications and outcome of tracheotomy in children who underwent cardiac surgeries.MethodsAll pediatric cardiac patients (under 14 years of age) who underwent cardiac surgeries and required tracheotomy from November 2000 to November 2010 were reviewed. The data were collected and reviewed retrospectively.ResultsSixteen children underwent tracheotomy after cardiac surgery. Fifteen of these cases had surgery for congenital heart disease, and one had surgery for an acquired rheumatic mitral valve disease. The mean ± SEMs of the durations of ventilation before and after tracheotomy were 60.4 ± 9.8 and 14.5 ± 4.79 days respectively (P value 0.0002). The means ± SEM of the lengths of ICU stay before and after tracheotomy were 63.31 ± 10.15 and 22 ± 5.4 days respectively (P value 0.0012). After the tracheotomy 12/16 patients (75%) were weaned from their ventilators and 10/16 were discharged from the PCICU. Six patients were discharged from the hospital and 3 were successfully decannulated. The overall survival rate was 9/16 (56%).ConclusionTracheostomy shortens the duration of mechanical ventilation and facilitates discharge from the ICU. The mortality of tracheotomy patients is still significant but is mainly related to the primary cardiac disease.     

Molecular identification and typing of Mycobacterium massiliense isolated from postsurgical infections in Brazil

ObjectiveOne hundred thirty-one cases of postsurgical infections were reported in Southern Region of Brazil between August 2007 and January 2008. Thirty-nine (29.8%) cases were studied; this report describes epidemiological findings, species identification, antimicrobial susceptibility and clonal diversity of rapidly growing mycobacteria isolated in this outbreak.MethodsAll 39 isolates were analyzed by Ziehl-Nielsen stained smear, bacterial culture and submitted to rpoB partial gene sequencing for identification. The isolates were also evaluated for their susceptibility to amikacin, cefoxitin, clarithromycin, ciprofloxacin, doxycycline, tobramycin and sulfamethoxazole.ResultsThirty-six isolates out of the confirmed cases were identified as Mycobacterium massiliense and the remaining three were identified as Mycobacterium abscessus, Mycobacterium chelonae and Mycobacterium fortuitum. All M. massiliense isolates were susceptible to amikacin (MIC₉₀ = 8 μg/mL) and clarithromycin (MIC₉₀ = 0.25 μg/mL) but resistant to cefoxitin, ciprofloxacin, doxycycline, tobramycin and sulfamethoxazole. Molecular analysis by pulsed-field gel electrophoresis clustered all 36 M. massiliense isolates and showed the same pattern (BRA 100) observed in three other outbreaks previously reported in Brazil.ConclusionsThese findings suggest a common source of infection for all patients and reinforce the hypotheses of spread of M. massiliense BRA100 in Brazilian hospital surgical environment in recent years.     

Gut microbiota of children with atopic dermatitis: Controlled study in the metropolitan region of São Paulo,Brazil

BackgroundIt is possible that imbalances in the composition of the gut microbiota or the relationship of the microbiota with the host may be implicated in the origin of allergy. Therefore, we studied the intestinal microbiota of children with atopic dermatitis (AD).MethodsCross-sectional study with 81 children aged 5–11; 23 with AD and 58 controls. Surveys were conducted to obtain demographic, socioeconomic and neonatal data. Diagnosis of AD was made based on the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. Eubacteria, Bacteroidetes, Firmicutes, B. fragilis, E. coli, Lactobacillus spp., S. aureus, E. faecalis, Salmonella spp., M. smithii, Bifidobacterium spp., C. difficile and C. perfringens were quantified using real-time PCR.ResultsThe analysis showed an association between presence of C. difficile (OR: 5.88; 95 % CI: 1.24; 27.98), greater abundance of bifidobacteria (OR: 11.09; 95 % CI: 2.14; 57.39) and a lower abundance of lactobacilli (OR: 0.07; 95 % CI: 0.01; 0.51) in the gut microbiota of children with AD. Counts of Eubacteria (0,05 × 10³ and 8.49 × 10³), B. fragilis (0.72 × 10⁹ and 4.5 × 10⁹), Lactobacillus spp. (0.02 × 10⁸ and 0.38 × 10⁸), E. coli (0.13 × 10⁹ and 1.52 × 10⁹) and M. smithii (0.02 × 10⁸ and 0.31 × 10⁸) were lower in children with AD (P < 0.05).ConclusionsThis study confirmed that children living in the metropolitan area of São Paulo (Brazil) with AD have a different microbiota pattern with higher prevalence of C. difficile, lower abundance of Lactobacillus and greater abundance of bifidobacteria, regardless of socioeconomic status.     

Hypoadiponectinemia in lipodystrophic HIV individuals: A metabolic marker of subclinical cardiac damage

Background and aimTo evaluate cardiovascular abnormalities in highly active antiretroviral therapy (HAART) treated HIV patients with no signs or symptoms of cardiovascular impairment, and to assess the relative role of multiple concomitant risk factors.Methods and resultsForty-four consecutive HIV subjects (mean age 41 ± 6 yrs) were enrolled. Inclusion criteria were HIV infection, CD4 + cell count > 150/ml, HAART treatment for at least 4 years. Metabolic serum levels, morphological and functional echocardiographic parameters were assessed in all subjects. Sixteen healthy age and sex matched subjects with no cardiovascular risk factors were recruited as controls.HIV patients showed increased left ventricular mass index with reduced mid-wall fractional shortening (mFS) when compared to controls (50.2 ± 10.5 vs. 38.6 ± 14.4, p = 0.05 and 18.3 ± 0.6 vs. 21.9 ± 0.7, p < 0.05, respectively). Twenty-nine patients were lipodystrophic (LD) and showed a longer HAART period (p = 0.0004) and greater use of protease inhibitors (PI) (p = 0.001). Coronary flow reserve (CFR) was significantly reduced in HIV patients as compared to controls (p < 0.0001), as it was in LD subjects when compared to non-lipodystrophic ones (NLD) (p < 0.001). Adiponectin concentrations were found to be significantly lower in LD subjects than in NLD ones (7.8 ± 0.8 vs. 13.8 ± 1.2 μg/ml, p = 0.01), and showed a direct correlation with CFR. In multiple regression analysis, insulin, HDL and adiponectin accounted for 63% of CFR variations.ConclusionsLeft ventricular hypertrophy, depressed mFS and reduced CFR represent the main signs of subclinical cardiac damage in HIV subjects treated with HAART. Hypoadiponectinemia in these subjects seems to be a metabolic risk factor of cardiovascular impairment.     

Human Immunodeficiency Virus Infection in Alabama Women: Sociodemographic,Behavioral, and Reproductive Health Characteristics and Factors Associated With Lack of Human Immunodeficiency Virus-1 Viral Control

BackgroundHuman immunodeficiency virus (HIV) infection among women in the southern United States is on the rise. This study examined sociodemographic profile and behavioral risk factors for HIV and sexually transmitted infections and assessed factors associated with HIV-1 viral control in a cohort of 280 HIV-infected Alabama women aged 17 to 66 years.MethodsWomen receiving care for HIV infection at a university outpatient HIV clinic were enrolled in the study. Women completed a self-administered questionnaire on demographics and behavioral risk factors at enrollment. They were followed up with appointments at least every 6 months with Papanicolaou smears, cervicovaginal lavages, cervical and vaginal swabs, and blood specimens collected at each visit.ResultsOf the women in the study, 69% were black, had mean age of 36 years, and ~ three fourths were mothers with annual household income < $20,000. White women were likely to have been HIV infected for a longer period (50.2 versus 36.3 months; P = 0.02) and had significantly lower viral loads at enrollment (P = 0.04) than black women. Factors associated with lack of HIV-1 control (≥ 10,000 RNA copies/mL) at enrollment included black race/ethnicity (odds ratio [OR]: 2.8; 95% confidence interval [CI]: 1.2 ? 6.8), CD4 + T-cell count < 200 cells/μL (OR: 20.1; CI: 8.6 ? 47.0), being diagnosed with HIV < 6 months (OR: 3.5; CI: 1.4 ? 8.9) and not being on any antiretroviral therapy (OR: 2.5; CI: 1.1 ? 5.7).ConclusionsPoorer HIV-1 viral control in black women at enrollment may indicate suboptimal access to HIV testing, delays in receipt of medical care after HIV-1 diagnosis, and/or some underlying biologic or social race-related influence.