Hemoglobinopathies in newborns from Salvador, Bahia, Northeast Brazil

Hemoglobinopathies are hereditary disorders of the hemoglobin molecule with a high prevalence worldwide. Brazil has a prevalence of 0.1 to 0.3% of newborns with sickle cell anemia and 20.0 to 25.0% of heterozygous alpha2 thalassemia among African Brazilians. In the present study, we investigated the presence of variant hemoglobins and alpha2(3.7 Kb) and alpha2 (4.2 Kb) thalassemia in newborns from Salvador, Bahia, Brazil. Samples of umbilical cord blood from a total of 590 newborns were analyzed, of which 57 (9.8%) were FAS; 36 (6.5%) FAC; one (0.2%) SF; and five (0.9%) FSC. One hundred fourteen (22.2%) newborns had alpha2(3.7 Kb) thalassemia, of whom 101 (19.7%) were heterozygous and 13 (2.5%) homozygous, showing statistical significance for hematological data between newborns with normal alpha genes and alpha2(3.7 Kb) thalassemia carriers. The alpha2(4.2 Kb) thalassemia was not found. Frequencies found in the present study confirm that hemoglobinopathies are a public health problem in Brazil, emphasizing the need for neonatal screening and genetic counseling programs.     

Giardia duodenalis infection and anthropometric status in preschoolers in Salvador, Bahia State, Brazil

The aim of this study was to estimate the association between Giardia duodenalis infection and anthropometric deficits, as measured by weight-for-age and height-for-age. This cross-sectional study included 629 children from 12 to 48 months of age, selected from 30 geographic areas in the city of Salvador, Bahia State, Brazil. Poisson regression and linear regression were used for the multivariate statistical analyses. G. duodenalis was diagnosed in 13.5% of the children. The children's breastfeeding duration and living conditions (garbage collection and paved streets or sidewalks) modified the effect of G. duodenalis infection on anthropometric status. Among infected children, there were statistically significant associations between weight deficit and shorter breastfeeding (PR=2.22; 95%CI: 1.56-3.14) and inadequate paving of streets and sidewalks (PR=2.00; 95%CI: 1.37-2.92), while height deficit was associated with deficient public garbage collection (PR=2.21; 95%CI: 1.31-2.51). In the linear regression, the association with the anthropometric indicators remained positive and statistically significant. The child's unhealthy living environment aggravated the negative effect of G. duodenalis infection on anthropometric status, and breastfeeding was a protective factor in the outcome.     

Evolution of inequalities in mortality in Salvador, Bahia State, Brazil, 1991/2006

An ecological study was carried out with the aim of analyzing the evolution of inequalities in mortality in Salvador, Bahia State, Brazil, between 1991 and 2006. The city was divided into four social strata from 95 geographic Information Zones. The variables used for social stratification were education level and income of heads of households. Crude and age-standardized mortality rates, age specific mortality rates, proportional Infant mortality and the proportional mortality ratio, were calculated for each zone and social strata. Data was obtained from Death Certificates and the Populational Census. Although differences between strata were smaller in 2000 than in 1991, they persist and are still high, ranging from 28.7% to 65.5%. The differences between Information Zones were as much as 575%. The authors discuss the shortcomings of information systems, recommending that health indicators should be estimated by social classes and pointing out the limits and possibilities of the methodology used here.     

Explaining caesarean section in Salvador da Bahia, Brazil

In Salvador da Bahia the caesarean section rate is excessive, as it is in Brazil as a whole. It is the standard form of delivery in private hospitals, though vaginal delivery still predominates in the public sector. This paper investigates the social context of these styles of childbirth, arguing that the connections between both sectors sustain this situation. Exploring the factors leading to the preference in private and insurance-funded maternity wards, it examines critically two diverging positions on the cause of the rate: that women's cultural preferences for abdominal birth lie behind it; or that obstetricians' self-interest is to blame. The paper critiques the theory of culture behind the first stance and questions the theoretical weight placed on individual action in the second. It argues that no particular social group is the principal cause of the excessive use of caesarean section to deliver babies. Rather, a host of factors converge in sustaining this practice. Finally, the paper stresses that the system as a whole, not any particular group, must be changed if the rate is to be lowered significantly. For this, political will is required.     

Tuberculosis in Salvador, Bahia, Brazil, in the 1990s

The characteristics of tuberculosis (TB) cases and deaths were analyzed in order to characterize the epidemiological profile of TB (incidence and mortality) in Salvador, Bahia, Brazil, in the 1990s. Annual incidence and mortality rates were calculated by gender, age bracket, and clinical forms of the disease using databases from the Tuberculosis Information System of the Bahia State Health Secretariat and the Mortality Information System of the Brazilian Ministry of Health. TB spatial distribution was analyzed according to health district. Cases and deaths were predominantly in males in the 15 to 39 year group. The pulmonary form showed the highest incidence and mortality. The existing data did not corroborate the hypothesis that AIDS/TB co-infection might contribute to maintaining the high mortality rates. The greater occurrence of tuberculosis in certain health districts may be associated with population density and unfavorable living conditions.     

First insights into the genetic diversity of Mycobacterium tuberculosis strains in Salvador, Bahia State, Brazil

This study constitutes a first attempt to describe the genetic population structure of Mycobacterium tuberculosis circulating in Salvador, Bahia State, Brazil. A total of 56 confirmed cases of pulmonary tuberculosis, identified between March and June 2008, were analyzed using restriction fragment length polymorphism (IS6110-RFLP). The study population was characterized by a predominance of males (71.43%) over 30 years of age (68.75%). Forty-one isolates were found to belong to a single pattern (73.2%), while 15 (26.7%) were found in group patterns, forming six clusters. The higher level of diversity observed is much more suggestive of endogenous reactivation than recent transmission.     

Distinct Zika Virus Lineage in Salvador,Bahia, Brazil

Sequencing of isolates from patients in Bahia, Brazil, where most Zika virus cases in Brazil have been reported, resulted in 11 whole and partial Zika virus genomes. Phylogenetic analyses revealed a well-supported Bahia-specific Zika virus lineage, which indicates sustained Zika virus circulation in Salvador, Bahia’s capital city, since mid-2014.Key words: Zika virus, ZIKV, flaviviruses, Bahia, Brazil, mosquito-borne infections, outbreak surveillance, metagenomic next-generation sequencing, viral genome assembly, capture probe enrichment, phylogenetic analysis, molecular clock, viruses, vector-borne infectionsZika virus is an arthropodborne RNA virus primarily transmitted by mosquitoes of the species Aedes (1). The virus has 2 genotypes: African, found only in the continent of Africa; and Asian, associated with outbreaks in Southeast Asia, several Pacific islands, and, recently, the Americas (2). In May 2015, Brazil reported its first autochthonous cases of Zika virus infection, which occurred in northeast Brazil (3,4). As of June 30, 2016, all 27 federal states in Brazil had confirmed Zika virus transmission (http://www.paho.org/hq/index.php?option=com_docman&task=doc_view&Itemid=270&gid=35262&lang=en).The rapid geographic expansion of Zika virus transmission and the virus’s association with microcephaly and congenital abnormalities (5) demand a rapid increase in molecular surveillance in areas that are most affected. Molecular surveillance is particularly relevant for regions where other mosquitoborne viruses, particularly dengue and chikungunya viruses, co-circulate with Zika virus (2); surveillance on the basis of clinical symptoms alone is highly inaccurate. Genetic characterization of circulating Zika virus strains can help determine the origin and potential spread of infection in travelers returning from Zika virus–endemic countries. Previous analyses have suggested that Zika virus was introduced in the Americas at least 1 year before the virus’s initial detection in Brazil (1). The state of Bahia, Brazil, reported most (93%) suspected Zika virus infections in Brazil during 2015 (2), including cases of Zika virus–associated fetal microcephaly (6); however, except for 1 complete genome, no genetic information from the region has been available (2,7). We report molecular epidemiologic findings resulting from 11 new complete and partial Zika virus genomes recovered from serum samples from patients at the Hospital Aliança in the city of Salvador in Bahia, Brazil.     

Community violence and childhood asthma prevalence in peripheral neighborhoods in Salvador, Bahia State, Brazil

This study aimed to identify degrees of exposure to community violence reported by parents and guardians of children from four to 12 years of age and the association with childhood asthma symptoms. A cross-sectional study was conducted with 1,232 parents/guardians in 24 peripheral neighborhoods in Salvador, the capital of Bahia State, Brazil. The authors investigated asthma symptoms in children and acts of violence in the community. More than 75% of parents/guardians had been exposed to community violence in the previous year, with 20% reporting high levels of exposure. Children that were more exposed to violence showed higher asthma prevalence (28.4%) as compared to non-exposed children (16.4%). Children exposed to maximum levels of violence were nearly twice as likely to present asthma symptoms (adjusted OR = 1.94; 95%CI: 1.12-3.36). The study highlighted the relevance of community violence as a risk factor for asthma and the need for further research to elucidate methodological issues.     

Critical issues for implementing oral health policy in the city of Salvador, Bahia State, Brazil

This study focuses on policy implementation by public organizations. This was a qualitative, exploratory case study focusing on Brazil's National Oral Health Policy, known as "Smiling Brazil", implemented in Salvador, the State capital of Bahia. The study aimed to identify factors that facilitated or hindered the policy's implementation, based on the public policy cycle and Carlos Matus' government triangle concept, for the period from 2004 to 2007. Data collection strategies included analysis of municipal documents, interviews with key informants, and direct observation of top management meetings at the Municipal Health Secretariat. The main factors that hindered implementation of the municipal oral health policy were the project's lack of specificity; lack of human resources; and lack of financial autonomy in the Municipal Health Secretariat. The study showed that the lack of connection between the variables comprising the government triangle raised obstacles to the implementation of oral health policy in Salvador.     

Trends and spatial distribution of mortality from external causes in Salvador, Bahia State, Brazil

Since 1980, external causes (ICD-9 E800-E999) have been ranked as the second leading causal group for mortality in Brazil, thus becoming a major public health problem. This study aimed to describe spatial distribution trends for violent deaths in the urban setting of Salvador, a city in Northeast Brazil, for the years 1988, 1991, and 1994. An ecological study was conducted, and mortality data were obtained from death certificates and the archives of the Institute for Forensic Medicine. There was an increase of 34.6% in the number of deaths from external causes between 1988 and 1994. The highest mortality rates were among men from 20 to 29 years of age (from 192.0 to 262.0/100,000) and those 65 years and over (from 188.7 to 258.1/100,000). Homicides were the leading cause of violent deaths in about 75.0% of neighborhoods. The authors discuss the need for comprehensive public policies and an interdisciplinary approach to elucidate the causes and deal with the problem of violence.     

Trends in hospitalizations for respiratory diseases in Salvador, Bahia State, Brazil, 1998-2009

Respiratory diseases are the leading cause of hospitalizations in Brazil (excluding hospital admissions related to childbirth, pregnancy, and postpartum). To analyze the trend and seasonality of hospitalizations for respiratory diseases in Salvador, Bahia State, Brazil, 1998-2009, a time trend study was performed using simple linear regression. Hospitalization rates for all respiratory diseases and specifically for asthma, chronic obstructive pulmonary disease (COPD), and pneumonia were calculated by year and age group. Hospitalizations for all respiratory diseases decreased by 45.6% (β = -2.2; p < 0.001); those due to asthma showed the largest decline (annual average 1.2/10,000), pneumonia showed the largest reduction until 2002, subsequently tending to stabilize, and COPD remained unchanged. The under-5-year age group showed the largest decline in hospitalizations for all respiratory diseases. There was no seasonality in hospitalizations for COPD. There was a reduction in the burden of hospitalizations due to respiratory diseases in Salvador, mainly due to the drop in asthma and pneumonia in children < 5 years. However, the city still has hospitalization rates for respiratory diseases that are higher than in other large Brazilian cities.     

Spatial distribution of tuberculosis mortality in Salvador,Bahia, Brazil

An ecological study was conducted to describe the urban spatial distribution of mortality attributable to tuberculosis in Salvador, Bahia, Brazil in 1991, 1994, and 1997. The unit of analysis was the Health District (HD). The HD with the highest standardized rates was Sub rbio Ferrovi rio in 1991, 1994, and 1997, with 15.7, 10.6, and 10.6/100.000 inhabitants, respectively. Inequalities in mortality between HDs were high. The year 1997 showed the lowest standardized rates. The proportional mortality ratios for tuberculosis when compared with total deaths from infectious diseases were 20.7%, 18.2%, and 16.9% for 1991, 1994, and 1997 respectively. The highest rates were observed in the age group over 65 years. The authors argue the possibilities of using the results for the implementation of equitable local health policies and health surveillance measures, since the methodology identified both the HD with the highest risk and the most heavily affected age groups.     

Impact of hospitalization on breastfeeding practices in a pediatric hospital in Salvador, Bahia State, Brazil

This cross-sectional study enrolled 97 inpatients at a teaching hospital in Salvador, Bahia, Brazil, to determine breastfeeding prevalence in infants less than 4 months of age hospitalized due to respiratory infection, and to evaluate the impact of hospitalization on breastfeeding. Patients' mothers were interviewed, and a standardized questionnaire was completed. After hospital discharge, medical records were reviewed and information on the infant's feeding practices during hospitalization was recorded. Exclusive breastfeeding was observed in 57.1% of patients, but it was interrupted in 35.4%, with the introduction of infant formula during hospitalization. Mean duration was not associated with the introduction of complementary feeding in the hospital. In the bivariate analysis, early interruption of exclusive breastfeeding was associated with higher maternal schooling and lower family income. Prevalence of exclusive breastfeeding was low. Hospitalization contributed to early interruption of exclusive breastfeeding in 35.4% of infants, possibly due to inadequate hospital infrastructure and insufficient support from health professionals to maintain exclusive breastfeeding.     

Zika virus complete genome from Salvador,Bahia, Brazil

In May 2015 the first autochthonous Zika virus infection was reported in Brazil. Rapid and urgent measures are needed to contain the ongoing outbreak. Here we report the full-length ZIKV coding sequence from Bahia. Genetic analysis of outbreak sequences will be essential for characterizing the diversity of circulating strains, identifying hotspots of virus transmission and guiding public health control. Rapid and urgent measures are needed to contain the ongoing outbreak.     

Evaluation of primary care coverage in Salvador, Bahia State, Brazil (2000 to 2007)

In order to test a method for evaluating coverage of primary healthcare services in Salvador, Bahia State, Brazil (2000-2007), a study of spatial and temporal clusters was performed, with the city and its 12 health districts as the analytical units. The real and potential coverage rates were estimated for various primary care procedures. Estimation of coverage rates used both the Ministry of Health guideline and a second standard aimed at establishing an approximation to the population's health needs. The data were obtained from the Outpatient Information System of the Unified National Health System (SIA-SUS). Low coverage rates were observed, despite a slight increase in real coverage for medical consultations (7.8%) and basic nursing care (66.7%). Meanwhile, dental consultations showed a 40% reduction. The study discussed the possibilities for using the methodology to monitor coverage and its limitations given the deficiencies in the information systems.     

Meanings and practices associated with health and illness among the homeless in Salvador, Bahia State, Brazil

This article aimed to analyze the practices and meanings associated with health and illness among homeless people in Salvador, Bahia State, Brazil. A qualitative anthropological study was conducted with participant observation and semi-structured interviews with 13 subjects 30 to 66 years of age. The results point to extremely precarious living and health conditions among the homeless. The narratives emphasize frequent violence. The main health problems were substance abuse, HIV/AIDS, mental disorders, and dental, dermatological, and gastrointestinal problems. Among other meanings, health was associated with the capacity to cope with everyday difficulties. Meanwhile, illness was identified as a state of weakness that hindered the struggle for survival. Homeless people only turned to health services when their health problems were serious and urgent. In conclusion, the study showed the need for specific policies to improve living conditions and access to healthcare for this population.     

Characteristics of private health care services in Salvador, Bahia, Brazil

To study the organization of private health services in the city of Salvador, Bahia, Brazil, a survey was carried out in 1994 involving 174 facilities registered at the Brazilian Institute of Statistics and Geography - IBGE. Health services characteristics studied were the following: number of physicians, hospital beds, production and cost of outpatient services, and legislative aspects. Health services were classified according to the amount of resources each type of granting agency contributed to support outpatient care. We found that the majority (51.1%) of private health care services in Salvador do not depend on public funds. The main sources of revenue for health services are private health insurance (41.9%) and other kinds of private health plans (54%). These changes in the organization of health services challenge health planners to review strategies for municipalization of health care and the relations between public and private health services in Brazil.     

Social inequalities and the rise in violent deaths in Salvador, Bahia State, Brazil: 2000-2006

An ecological study was carried out using information zones as units of analysis in order to assess the evolution of socio-spatial inequalities in mortality due to external causes and homicides in Salvador, Bahia State, Brazil, in 2000 and 2006. The Brazilian Institute of Geography and Statistics (Instituto Brasileiro de Geografia e Estatística--IBGE) and the City Health Department (Secretaria Municipal de Saúde) provided the data sources, and causes of death were reviewed and reclassified based on reports from the Institute of Legal Medicine (Instituto Médico Legal). The information zones were classified into four social strata according to income and schooling. The ratio between mortality rates (inequality ratio) was calculated and confirmed a rise of 98.5% in the homicide rate. In 2000, the risk of death due to external causes and murders in the stratum with the worst living conditions was respectively 1.40 and 1.94 times greater than in the reference stratum. In 2006 these figures were 2.02 and 2.24. The authors discuss the implications for inter-sectoral public policies, based on evidence from the study's findings.