Search

Made available in DSpace on 2020-12-12T02:05:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 The presence of microorganisms in potable water can alter its quality and cause public health issues when ingested or after contact with skin and mucous membranes, especially in individuals with impaired immune system. The aim of this study was to assess the occurrence and seasonality of potentially pathogenic yeast in the public water supply of a municipality in the state of São Paulo, Brazil. In addition, to evaluate the in vitro susceptibility profiles of the isolates against four antifungal drugs. Water samples (n = 1923) were collected from distinct points of the public water system, 15 days after the beginning of each climatic season. They were filtered through a cellulose membrane, which was subsequently upturned on an agar plate. Results show that 11.5% of the samples were positive for yeasts. After identification of the isolates, Rhodotorula minuta was the most prevalent in spring (48.6%), fall (35.2%), and summer (46.3%); and Candida spp. in winter (68.2%). Resistant phenotypes were observed in 54.2% of the isolates, mainly because of Rhodotorula spp. As conclusions, yeasts are present in the water supply during all seasons of the year with great species variability and significant rates of resistance. These results indicate a health concern, suggesting that water quality control protocols require changes to minimize exposure to potentially pathogenic microorganisms and selection of resistant strains. Department of Infectious Diseases São José do Rio Preto School of Medicine (FAMERP), Brigadeiro Faria Lima Av., 5416 Dermatology Laboratory University Hospital of Geneva, Street Gabrielle Perret-Gentil 4 Microbiology Post-Graduation Program Institute of Biosciences Humanities and Exact Sciences (Ibilce) São Paulo State University (UNESP), Cristóvão Colombo St., 2265 Capture/Quality Division SeMAE – Autonomous Municipal Water and Sewage Service, Antônio de Godoy St., 2181 Department of Molecular Biology São José do Rio Preto School of Medicine (FAMERP), Brigadeiro Faria Lima Av., 5416 Microbiology Post-Graduation Program Institute of Biosciences Humanities and Exact Sciences (Ibilce) São Paulo State University (UNESP), Cristóvão Colombo St., 2265

Made available in DSpace on 2021-06-25T10:35:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-09-01. Added 1 bitstream(s) on 2021-07-15T15:04:43Z : No. of bitstreams: 1 S0103-50532020000901926.pdf: 2171924 bytes, checksum: bda45f03c09642f18b9474d829b3b9c0 (MD5) The essential oil of Cymbopogon nardus, citronella, has been extensively studied. However, the chemical and biological properties of the ethanolic extract (EE) of C. nardus have not been evaluated. The aim of this study was to characterize the chemical composition of the EE of C. nardus and its active fraction (FrD). Moreover, the cytotoxic and antifungal properties of these extracts against Candida species with different resistance profiles to conventional drugs were evaluated. The compounds identified in EE were mono-C- and di-C-glycosyl flavones and phenylpropanoid glycosides. Phenylpropanoid glycosides were identified in FrD. EE showed antifungal activity, with minimum inhibitory concentration (MIC) values ranging from 62.5 to 500 µg mL-1. FrD was more effective against C. glabrata, as evidenced by the lowest MIC value (15.6 µg mL-1). EE inhibited yeast growth similar to amphotericin-B, as demonstrated by similar time-kill curves. EE inhibited C. albicans hyphae formation and mature biofilm of C. albicans, C. krusei and C. parapsilosis. The results of the chemical and biological analyses of EE and its fractions provided novel information and may contribute to control of infections caused by Candida species. Departamento de Ciências Biológicas Faculdade de Ciências Farmacêuticas Universidade Estadual Paulista (Unesp) Departamento de Doenças Infecciosas Faculdade de Medicina de São José do Rio Preto (FAMERP) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Departamento de Princípios Ativos Naturais e Toxicologia Faculdade de Ciências Farmacêuticas Universidade Estadual Paulista (Unesp) Departamento de Ciências Biológicas Faculdade de Ciências Farmacêuticas Universidade Estadual Paulista (Unesp) Departamento de Princípios Ativos Naturais e Toxicologia Faculdade de Ciências Farmacêuticas Universidade Estadual Paulista (Unesp)

Made available in DSpace on 2020-12-12T02:24:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01. Added 1 bitstream(s) on 2021-07-15T15:07:34Z : No. of bitstreams: 1 S1516-31802019000600512.pdf: 185752 bytes, checksum: 61644e5a66196ab3b3a568f4d06d4bee (MD5) BACKGROUND: Fungi are ubiquitous in the environment. They are able to grow in water and many of them may be opportunistic pathogens. OBJECTIVE: The aims were to identify fungi in registered wells (RWs) and nonregistered wells (NRWs) that tap into groundwater; and to correlate the results from physicochemical assays on this water (free residual chlorine and pH) with the presence of fungi. DATA AND SETTING: Analytical cross-sectional quantitative study on groundwater wells in São José do Rio Preto, São Paulo, Brazil. METHODS: 52 samples of 500 ml of water were collected from RWs and 107 from NRWs. These were sent to a microbiology laboratory to identify any fungi that were present. In addition, free residual chlorine and pH were measured immediately after sample collection. Several statistical analysis tests were used. RESULTS: Fungal contamination was present in 78.8% of the samples from RWs and 81.3% from NRWs. Filamentous fungi were more prevalent than yeast in both types of wells. There was no significant difference in presence of fungi according to whether chloride and pH were within recommended levels in RWs; or according to whether pH was within recommended levels in NRWs. Furthermore, there was no statistical difference in the levels of fungal contamination between RWs and NRWs. CONCLUSION: Both RWs and NRWs are potential reservoirs for many types of fungi. Many of these may become opportunistic pathogens if they infect immunosuppressed individuals. Furthermore, this study confirms that fungi are able to grow even when chlorine and pH parameters are within the standards recommended. Faculdade de Medicina de São José do Rio Preto (FAMERP) Universidade Estadual Paulista (UNESP) Universidade Federal do Mato Grosso do Sul (UFMS) Adolfo Lutz Institute Regional Laboratory of São José do Rio Preto Department of Infectious and Parasitic Diseases Faculdade de Medicina de São José do Rio Preto (FAMERP) Department of General and Specialized Nursing Escola de Enfermagem de Ribeirão Preto da Universidade de São Paulo (EERP-USP) Institute of Hygiene and Medicine Tropical New University of Lisbon Department of Molecular Biology School of Medicine of São José do Rio Preto Department of Infectious and Parasitic Diseases School of Medicine of São José do Rio Preto Universidade Estadual Paulista (UNESP)

Made available in DSpace on 2019-10-04T13:15:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-06-01 The objectives of this study were to identify yeasts in 40 feces samples of Agapornis birds and determine their antifungal susceptibility profile by two methodologies. Results indicated 92.5% of positivity (46 isolates). Six genera were identified (14 species): Cryptococcus (39.13%), four species; Candida (36.96%), four species; Rhodotorula (13.05%), two species; Trichosporon (6.52%), two species; Kodamaea ohmeri (2.17%); and Sporobolomyces salmonicolor (2.17%). Regarding the susceptibility profiles, 41.3% of the isolates showed low sensibility to fluconazole and 47.8% to itraconazole. Thus, Agapornis sp. disseminate potentially pathogenic and resistant yeasts. Precautionary measures should be taken regarding breeding and keeping them as pets. Fac Med Sao Jose do Rio Preto, Lab Microbiol, 5416 Brigadeiro Faria Lima Ave, BR-15090000 Sao Jose Do Rio Preto, Brazil Univ Estadual Paulista, 2265 Cristovao Colombo St, BR-15054000 Sao Jose Do Rio Preto, Brazil Univ Estadual Paulista, 2265 Cristovao Colombo St, BR-15054000 Sao Jose Do Rio Preto, Brazil

Made available in DSpace on 2018-11-26T17:39:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-06-30 Background: Laboratory analysis of organisms in water include arduous methods, such as the multiple tube and membrane filter. The ATP bioluminescence system, proposes a new way of measuring cellular material in water by measuring adenosine triphosphate (ATP) levels, which are expressed in relative light units (RLU). The ATP bioluminescence assay has been increasingly used to assess the microbiological safety of the hospital environment. However, there are few studies investigating the use of this methodology to evaluate the microbiological quality of water. The objective of the present study was to verify whether ATP, as measured by the 3 M (TM) Clean-Trace Water (TM) ATP test, can be used as an alternative tool for presumptive testing for the presence of microorganisms in hospital water. Methods: Water samples (N = 88) were collected from faucets (74) and water purifiers (14) in a university hospital. The sample were filtered by the membrane filter technique (100 mL for bacterial analysis and 100 mL for fungal analysis) and then submitted to ATP bioluminescence assay to the determine quantity of RLU in each sample. In order to compare RLU and the presence of microorganisms, a receiver operating characteristic (ROC) curve was used to calculate sensitivity and specificity (levels higher than 90% were considered significant). In addition, control tests were conducted to compare RLU to the quantities of bacterial and fungal organisms added to distilled water (ANOVA and Tukey's tests; p

Background: The incidence of fungal infections, especially those caused by Candida yeasts, has increased over the last two decades. However, the indicated therapy for fungal control has limitations. Hence, medicinal plants have emerged as an alternative in the search for new antifungal agents as they present compounds, such as essential oils, with important biological effects. Published data demonstrate important pharmacological properties of the essential oil of Cymbopogon nardus (L.) Rendle; these include anti-tumor, anti-nociceptive, and antibacterial activities, and so an investigation of this compound against pathogenic fungi is interesting. Objective: The aim of this study was to evaluate the chemical composition and biological potential of essential oil (EO) obtained from the leaves of C. nardus focusing on its antifungal profile against Candida species. Methods: The EO was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). Testing of the antifungal potential against standard and clinical strains was performed by determining the minimal inhibitory concentration (MIC), time-kill, inhibition of Candida albicans hyphae growth, and inhibition of mature biofilms. Additionally, the cytotoxicity was investigated by the IC50 against HepG-2 (hepatic) and MRC-5 (fibroblast) cell lines. Results: According to the chemical analysis, the main compounds of the EO were the oxygen-containing monoterpenes: citronellal, geranial, geraniol, citronellol, and neral. The results showed important antifungal potential for all strains tested with MIC values ranging from 250 to 1000 μg/mL, except for two clinical isolates of C. tropicalis (MIC > 1000 μg/mL). The time-kill assay showed that the EO inhibited the growth of the yeast and inhibited hyphal formation of C. albicans strains at concentrations ranging from 15.8 to 1000 μg/mL. Inhibition of mature biofilms of strains of C. albicans, C. krusei and C. parapsilosis occurred at a concentration of 10× MIC. The values of the IC50 for the EO were 96.6 μg/mL (HepG-2) and 33.1 μg/mL (MRC-5). Conclusion: As a major virulence mechanism is attributed to these types of infections, the EO is a promising compound to inhibit Candida species, especially considering its action against biofilm.

The preparation and thermal decomposition of lanthanide selenates [1] and magnesium selenate [2,3] have been reported previously. However, no information is available in the literature concerning the thermal decomposition of lanthanide and magnesium double selenates.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:18:36Z No. of bitstreams: 1 WOS000207598400124.pdf: 103179 bytes, checksum: b375f3d4533efbfa3e87eb2a684354cc (MD5) Made available in DSpace on 2014-02-26T17:18:36Z (GMT). No. of bitstreams: 1 WOS000207598400124.pdf: 103179 bytes, checksum: b375f3d4533efbfa3e87eb2a684354cc (MD5) Previous issue date: 2007-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:41:46Z No. of bitstreams: 1 WOS000207598400124.pdf: 103179 bytes, checksum: b375f3d4533efbfa3e87eb2a684354cc (MD5) Made available in DSpace on 2014-05-20T13:41:46Z (GMT). No. of bitstreams: 1 WOS000207598400124.pdf: 103179 bytes, checksum: b375f3d4533efbfa3e87eb2a684354cc (MD5) Previous issue date: 2007-01-01 The objective of the present study was quantifying the spermatic production per gram and daily rate of the testicular parenchyma. Testis of 12 crossbred Murrah buffaloes aged 24 to 48 months created under extensive conditions in the State of São Paulo/Brazil were analyzed. Animals were divided into groups based on the testicular shape (long and long-moderate) and testicular sides (right and left) and the studied parameters were: length and testicular width, weight and volume of the albuginea and mediastinum and net weight of the testicular parenchyma, gonadic sperm reserves, spermatic production/g of testicular parenchyma, daily spermatic production/g, total daily spermatic production, resulting into the values: 8.16 +/- 0.87 and 4.29 +/- 0.50 cm; 9.09 +/- 1.91 g and 8.77 +/- 1.88 mL; 0.97 +/- 0.39 g and 0.90 +/- 0.38 mL; 112.91 +/- 18.85 g; 14.32 x 10(9) +/- 0.15; 13.42 x 10(6) +/- 0.17; 27.40 x 10(6) +/- 0.35 and 2.92 x 10(9) +/- 0.30, registering no difference between right and left testis in relation to the parameters (P>0.05). There was no relation between testicular biometry and spermatic production (P>0.05). According to the obtained values, all animals were considered sexually mature and presented an efficient spermatic production per gram of testicular parenchyma and total daily production. UNESP, FMVZ, Dept Anim Reprod & Vet Radiol, BR-18618000 Botucatu, SP, Brazil Univ Fed Vicosa, Dept Vet Med, BR-36570000 Vicosa, MG, Brazil UNESP, FMVZ, Dept Anim Reprod & Vet Radiol, BR-18618000 Botucatu, SP, Brazil

The HIV/AIDS epidemic is a dynamic unstable global phenomenon, constituting a veritable mosaic of regional sub-epidemics. As a consequence of the deep inequalities that exist in Brazilian society, the spread of HIV infection has revealed an epidemic of multiple dimensions undergoing extensive epidemiological transformations. Initially restricted to large urban centers and markedly masculine, the HIV/AIDS epidemic is currently characterized by heterosexualization, feminization, interiorization and pauperization. The evolution of the profile of AIDS in Brazil is above all due to the geographical diffusion of the disease from large urban centers towards medium and small municipalities in the interior, to the increase in heterosexual transmission and the persistent growth of cases among injecting drug users. The increase in transmission through heterosexual contact has resulted in substantial growth of cases among women, which has been pointed out as the most important characteristic of the epidemic's current dynamic in Brazil.

In Brazil, implementation of the so-called "Provão", or National Medical Course Examination, has raised numerous levels of discussion. This article aims to identify patterns in some of the more controversial issues: whether the Exam is really an instrument for evaluation of medical courses themselves, or that of future physicians; adequacy of assumptions underlying the questions as formulated; and lack of precision in the questions.

This study proposes a procedure to estimate the number of orphans due to maternal AIDS. The procedure estimates the number of orphans by calendar year, multiplying the cumulative fertility rate by the number of AIDS deaths among women aged 15-49 years. Because the procedure refers to the number of children that are alive, the estimate is adjusted by contemplating the proportion of pediatric AIDS cases due to vertical transmission and the probability of survival in the 5-9-year age group. To estimate the number of AIDS orphans in Brazil from 1987 to 1999, the procedure was applied by stratifying according to geographical region, taking into account the differences in regional fertility rates, completeness of death reporting, and misclassification of AIDS-related deaths as due to other causes. The total number of cumulative AIDS orphans for 1987-99 was estimated at approximately 30,000.

This study estimates the number of HIV-infected individuals from 15 to 49 years of age in Brazil in 1998 based on sentinel population studies in pregnant women, with a selection bias in the sample. A principal components procedure was used to group 44 counties in homogeneous 13 clusters. Two indicators were constructed for each cluster: a) the logarithm of the accumulated AIDS incidence rate among women from 15 to 34 years of age (1996) and b) the logarithm of the growth ratio for the mean AIDS incidence rate for women from 15 to 34 years of age for the period from 1990-1992 to 1993-1996. Taking the log of the proportion of HIV-infected pregnant women as the dependent variable and the two above-mentioned indicators as the independent variables, a regression line was fitted to the aggregate data. Estimation of the model's parameters allowed us to calculate the proportion of infected individuals by macro-region, by age (15-34 and 35-49 years) and gender. The point estimate was 536 thousand HIV-infected adults with a 68% CI (470.689 - 603.305).

A study of HIV-related risk behavior was carried out in 1998 among Brazilian military conscripts aged 17-20 years. A sample of 30,318 subjects was selected in three strata, pertaining to counties from: 1) the North and Central-West (N/CW); 2) South (S); and the states of Rio de Janeiro and São Paulo. HIV prevalence rates were estimated in all strata. The objective of this paper was to analyze the results according to differences in socioeconomic status (SES). The statistical analysis used an index of sexual risk behavior and logistic regression models. The N/CW stratum showed the worst indicators for SES, sexual risk behavior, and sexually transmitted infections (STIs), as well as the highest HIV seroprevalence rate. The best indicators for all variables were found in the RJ/SP stratum. The South showed intermediate results. Level of schooling also played a relevant role. In all three strata the conscripts with an incomplete high school education displayed the worst sexual risk behavior index, shown to be a relevant predictor of STI-related problems, including HIV infection.

HIV-1-positive individuals were recruited from January 1993 to December 1996 from several cohorts receiving follow-up in the city of Rio de Janeiro, Brazil, to evaluate HIV-1 genetic variability and the potential association with modes of transmission. HIV-1 subtyping was carried out using the heteroduplex mobility assay (HMA), and those samples corresponding to the typical Brazilian subtype B variant were further identified based on the Fok I restriction fragment length polymorphism (RFLP). DNA sequencing was performed to evaluate one case of subtype D infection. From the 131 HIV-1-positive individuals analyzed, 106 (80.9%) could be identified as infected by subtype B and 20 (15.3%) by subtype F. One of the samples (0.8%) was classified as subtype D. DNA samples from 4 patients (3.0%) did not yield polymerase chain reaction (PCR)-amplified products to be typed. Based on the Fok I RFLP, 39 of the 106 subtype B samples (37%) were identified as corresponding to the typical Brazilian subtype B variant containing the GWGR motif at the tip of the V3 loop. No statistically significant association could be detected between HIV-I subtypes and modes of transmission, exposure categories, or gender. This is the first reported case of HIV-1 subtype D infection in Brazil.

Several risk factors for male-to-female human immunodeficiency virus (HIV) transmission are well established, but few studies have examined the role of postcoital vaginal bleeding.Couples recruited from AIDS centers in Rio de Janeiro, Brazil, were interviewed for risk factors and had blood collected for examinations. Eligibility criteria included confirmed HIV positivity for the male partner, aged 18 years of older, heterosexual contact in the past year, and no other risk factor for female partners except sexual contact with the HIV-infected male partner. Logistic regression was used to assess the association between HIV serostatus and risk factors in the female partners.The prevalence of HIV infection was 47.6% among the 418 women available for analysis. The following factors were independently associated with HIV infection; anal sex (odds ratio [OR], 3.06), condom use during vaginal sex sometimes (OR, 1.42) and rarely to never (OR, 2.00) compared with always, frequency of sexual contacts (100 in the previous year) (OR, 1.71), HIV-infected male partners with symptoms of acquired immunodeficiency syndrome (OR, 1.70), and postcoital vaginal bleeding (OR, 1.89). The association of postcoital bleeding and HIV infection was more pronounced among women who did not engage in anal sex.The results support previous studies showing that advanced HIV infection in the male partner, anal sex, inconsistent condom use, and frequent sex are associated with HIV infection among the female partners of HIV-infected men. Postcoital vaginal bleeding was also identified as a risk factor for infection. In addition to other established preventive measures, a recommendation for seeking diagnosis and treatment of sexually transmitted diseases that are associated with postcoital bleeding and using water-soluble lubricants during sex to minimize trauma seems prudent.

A heterosexual partner study was carried out in Rio de Janeiro, Brazil, from August 1990 to December 1991. The main objectives were to determine the rate of male-to-female transmission of human immunodeficiency virus (HIV) and to determine risk factors. Male index cases were recruited according to the following criteria: 1) confirmed HIV positivity, 2) 18 years old or older; 3) heterosexual contact within the past year. Only female partners who reported not to have other risk factors but to have had sexual contact with the index case were invited to participate. Couples were interviewed for risk factors and had blood collected for laboratory studies. The overall prevalence of HIV infection was 45 percent among 204 female partners in the study. Using logistic regression, the authors found the following factors to be independently (p0.05) associated with HIV infection: 1) anal sex (odds ratio (OR) = 3.74, 95% confidence interval (CI) 1.87-7.45); 2) condom use during vaginal sex sometimes (OR = 1.45, 95% CI 1.07-1.96), rarely (OR = 2.10, 95% CI 1.15-3.83), or never (OR = 3.04, 95% CI 1.23-7.50) as compared with always; 3) frequency of sexual contacts in the year prior to interview (100+) (OR = 2.00, 95% CI 1.03-3.91); and 4) oral contraceptive use (OR = 2.04, 95% CI 0.97-4.29). In addition to a borderline significance of oral contraceptive use, there was a strong suggestion of an interaction with history of sexually transmitted diseases.

We studied 567 patients with active pulmonary tuberculosis (APT) in Rio de Janeiro, Brazil, by using a standardized questionnaire and by testing blood for HIV antibodies. The rate of HIV infection was 3.9% in 1987, 4.8% in 1988, and 5.2% in 1989, and did not differ by sex. It was highest (7.4%) in the 15- to 39-year age group. There was no difference between patients infected and not infected by HIV with regard to education, income, housing, or employment. Among all patients with definite HIV risk behavior, the HIV infection rate was 23.3%, rising to 31.2% among homo/bisexual men and 36.4% among intravenous drug users, and the rate was 6.5% for blood-transfusion recipients. Among patients who denied risk behavior, the rate was 1.2%. Generalized lymphadenopathy and oral candidiasis occurred with greater frequency among HIV-infected patients (p0.0001). Applying the World Health Organization 1985 clinical criteria and revised case definition for AIDS, we found, respectively, sensitivities of 34% and 76.9% and specificities of 31% and 26.3%; in the Rio de Janeiro environment, these clinical criteria without HIV serology should not be adopted for tuberculosis patients. For chest radiographs, a significant association was found between HIV infection and the occurrence of atypical images (p = 0.0001), and hilar and/or mediastinal adenopathy (p = 0.0002) and absence of cavities (p = 0.0003). A PPD (purified protein derivative) skin test induration of5 mm was identified in 53% of the HIV-positive cases and in 31.3% of the HIV-negative cases. Only 11.5% of HIV-infected APT patients met the Centers for Disease Control 1987 AIDS criteria.

Os valores de complemento hemolítico total, C3 total (nativo + produtos de degradação) e o grau de conversão de C3 nativo foram estudados em dois subgrupos de pacientes chagásicos, nas formas cardíaca e indeterminada, e em um subgrupo de indivíduos não chagásicos, clinicamente sadios. Os níveis de C3 total e as taxas de conversão de C3 em seus produtos de degradação foram semelhantes nos três subgrupos. Os valores de complemento hemolítico total foram estatisticamente diferentes nos três subgrupos (nível de significância descritivo p = 0,0757), tendo sido observada média aritmética mais baixa no subgrupo de cardíacos e mais elevada no subgrupo de controles. Maior amplitude de variação dos níveis de complemento hemolítico total foi notada no subgrupo de cardíacos, no qual se encontraram os valores extremos (máximo e mínimo), considerando-se todos os subgrupos. The levels of hemolytic complement and total C3 (native C3 plus its degration products) and the degree of conversion of native C3 into its breakdown products were studied in sera from two subgroups of chagasic patients (indeterminate and cardiac forms) and from non chagasic individuals (control subgroup). The levels of total C3 and the degree of conversion of native C3 into its breakdown products were similar in the three subgroups. The levels of hemolytic complement were statistically different among the three subgroups. The lowest average was observed in the subgroup of cardiac patients and the highest average in the control subgroup of non chagasic individuals. The widest variation on levels of hemolytic complement was observed in the subgroup of cardiac patients in which we found the maximum and minimum values among all the subgroups.