Implementing maternal and newborn health quality of care standards in healthcare facilities to improve the adoption of respectful maternity care in Bangladesh, Ghana and Tanzania: a controlled before and after study

INTRODUCTION

Many women worldwide cannot access respectful maternity care (RMC). We assessed the effect of implementing maternal and newborn health (MNH) quality of care standards on RMC measures.

METHODS

We used a facility-based controlled before and after design in 43 healthcare facilities in Bangladesh, Ghana and Tanzania. Interviews with women and health workers and observations of labour and childbirth were used for data collection. We estimated difference-in-differences to compare changes in RMC measures over time between groups.

RESULTS

1827 women and 818 health workers were interviewed, and 1512 observations were performed. In Bangladesh, MNH quality of care standards reduced physical abuse (DiD -5.2;-9.0 to -1.4). The standards increased RMC training (DiD 59.0; 33.4 to 84.6) and the availability of policies and procedures for both addressing patient concerns (DiD 46.0; 4.7 to 87.4) and identifying/reporting abuse (DiD 45.9; 19.9 to 71.8). The control facilities showed greater improvements in communicating the delivery plan (DiD -33.8; -62.9 to -4.6). Other measures improved in both groups, except for satisfaction with hygiene. In Ghana, the intervention improved women's experiences. Providers allowed women to ask questions and express concerns (DiD 37.5; 5.9 to 69.0), considered concerns (DiD 14.9; 4.9 to 24.9), reduced verbal abuse (DiD -8.0; -12.1 to -3.8) and physical abuse (DiD -5.2; -11.4 to -0.9). More women reported they would choose the facility for another delivery (DiD 17.5; 5.5 to 29.4). In Tanzania, women in the intervention facilities reported improvements in privacy (DiD 24.2; 0.2 to 48.3). No other significant differences were observed due to improvements in both groups.

CONCLUSION

Institutionalising care standards and creating an enabling environment for quality MNH care is feasible in low and middle-income countries and may facilitate the adoption of RMC.

Institutionalising maternal and newborn quality-of-care standards in Bangladesh, Ghana and Tanzania: a quasi-experimental study

Introduction

Facility interventions to improve quality of care around childbirth are known but need to be packaged, tested and institutionalised within health systems to impact on maternal and newborn outcomes.

Methods

We conducted cross-sectional assessments at baseline (2016) and after 18 months of provider-led implementation of UNICEF/WHO’s Every Mother Every Newborn Quality Improvement (EMEN-QI) standards (preceding the WHO Standards for improving quality of maternal and newborn care in health facilities). 19 hospitals and health centres (2.8M catchment population) in Bangladesh, Ghana and Tanzania were involved and 24 from adjoining districts served for ‘comparison’. We interviewed 43 facility managers and 818 providers, observed 1516 client–provider interactions, reviewed 12 020 records and exit-interviewed 1826 newly delivered women. We computed a 39-criteria institutionalisation score combining clinical, patient rights and cross-cutting domains from EMEN-QI and used routine/District Health Information System V.2 data to assess the impact on perinatal and maternal mortality.

Results

EMEN-QI standards institutionalisation score increased from 61% to 80% during EMEN-QI implementation, exceeding 75% target. All mortality indicators showed a downward trajectory though not all reached statistical significance. Newborn case-fatality rate fell significantly by 25% in Bangladesh (RR=0·75 (95% CI=0·59 to 0·96), p=0·017) and 85% in Tanzania (RR=0.15 (95% CI=0.08 to 0.29), p<0.001), but not in Ghana. Similarly, stillbirth (RR=0.64 (95% CI=0.45 to 0.92), p<0.01) and perinatal mortality in Tanzania reduced significantly (RR=0.59 (95% CI=0.40 to 0.87), p=0.007). Institutional maternal mortality ratios generally reduced but were only significant in Ghana: 362/100 000 to 207/100 000 livebirths (RR=0.57 (95% CI=0.33 to 0.99), p=0.046). Routine mortality data from comparison facilities were limited and scarce. Systematic death audits and clinical mentorship drove these achievements but challenges still remain around human resource management and equipment maintenance systems.

Conclusion

Institutionalisation of the UNICEF/WHO EMEN-QI standards as a package is feasible within existing health systems and may reduce mortality around childbirth. Critical gaps around sustainability must be fundamental considerations for scale-up.

Bottleneck analysis of maternal and newborn health services in hard-to-reach areas of Bangladesh using ‘TANAHASHI’ framework’: An explanatory mixed-method study

Maternal and Newborn Health (MNH) is of paramount importance in the realm of attaining sustainable development goals that also focuses on universal health coverage (UHC). The study aimed at identifying and exploring the bottlenecks in MNH services in Hard-to-reach (HtR) areas of Bangladesh using the Tanahashi framework exploring the possible remedial approaches. The study was conducted in four different types of HtR areas (hilly, coastal, lowlands, and river islands) by utilizing a sequential explanatory mixed-method design. Overall, we collected information from 20 health facilities and 2,989 households by interviewing 2,768 recently delivered women (RDW) with a structured questionnaire and qualitative interviews (n = 55) of facility managers, local stakeholders, RDWs, and health care providers (HCP). The quantitative data were analyzed principally for descriptive statistics and the qualitative data was analyzed by utilizing the thematic approach. Antenatal care, under-5 care, and family planning services were available in almost all the facilities. However, Normal vaginal deliveries were performed in 55.6% of the union-level facilities. Only 40% of sub-district level facilities had provision for C-sections. Blood transfusion services were available in only 20.1% of facilities, whereas laboratory services were obtainable in 51.7% of facilities. Overall, the bottlenecks were identified in cases of availability of drugs, human resources, transportation, lack of knowledge regarding different essential services and health components, out of pocket expenditure etc. There have been several remedial approaches suggested from both the demand and supply side that included incentives for care providers for staying in these areas, a coordinated transport/referral system, and health education campaigns. More research works are warranted in HtR areas, especially to test the proposed interventions. Meanwhile, the government should take the necessary steps to overcome the bottlenecks identified.

Estimation of Serum Fibrinogen in Males with Type 2 Diabetes

The patient with diabetes mellitus (DM) and its complication is increasing in our country and all over the world. Fibrinogen is a renowned factor of progressive atherosclerotic lesions and a predictor of cardiovascular events. Level of fibrinogen is increases in patients with diabetes mellitus (DM) may accelerate thromboembolic risk for cardiovascular disease (CVD). This study was carried out to assess plasma fibrinogen level in subjects with type 2 diabetes mellitus. It was a cross sectional analytic study and conducted in the Department of Physiology, Dhaka Medical College, Dhaka, Bangladesh from July 2013 to June 2014. A total number of 200 adult male subjects were selected with age ranging from 40-60 years. Among them, 100 subjects with type 2 diabetes mellitus were included in the study group (Group B) and 100 healthy subjects with same age range were considered as controls (Group A) for comparison. The subjects were selected from BIRDEM hospital Dhaka and personal contact from different areas of Dhaka city on the basis of exclusion and inclusion criteria. The study parameter was plasma fibrinogen level, and was measured in the Department of Microbiology and Immunology of BIRDEM hospital, Dhaka, Bangladesh. The data were collected and recorded in pre-designed structured questionnaire by the researcher herself. For statistical analyses unpaired Student's 't' test and Pearson's correlation coefficient (r) test were performed as applicable using SPSS for windows version 19.0. In this study plasma fibrinogen level was significantly (p<0.001) higher in the study group than that of control group. From this study, it may be concluded that estimation of plasma fibrinogen level might be beneficial for prediction of future cardiovascular risk in adult diabetic male.

OUP accepted manuscript

Current methods for tuberculosis treatment monitoring are suboptimal. We evaluated plasma matrix metalloproteinase (MMP) and procollagen III N-terminal propeptide concentrations before and during tuberculosis treatment as biomarkers. Plasma MMP-1, MMP-8, and MMP-10 concentrations significantly decreased during treatment. Plasma MMP-8 was increased in sputum Mycobacterium tuberculosis culture–positive relative to culture-negative participants, before (median, 4993 pg/mL [interquartile range, 2542–9188] vs 698 [218–4060] pg/mL, respectively; P = .004) and after (3650 [1214–3888] vs 720 [551–1321] pg/mL; P = .008) 6 months of tuberculosis treatment. Consequently, plasma MMP-8 is a potential biomarker to enhance tuberculosis treatment monitoring and screen for possible culture positivity.

Physician-patient communication in decision-making about Caesarean sections in eight district hospitals in Bangladesh: a mixed-method study

Background

Caesarean sections (CS) in Bangladesh have risen eight-fold in the last 15 years. Few studies have explored why. Anecdotally, physicians suggest maternal request for CS is a reason. Women and families suggest physicians influence their decision-making. The aim of this research was to understand more about the decision-making process surrounding CS by exploring physician–patient communication leading to informed-consent for the operation.

Methods

We conducted a mixed-method study using structured observations with the Option Grid Collaborative’s OPTION5 tool and interviews with physicians and women between July and December 2018. Study participants were recruited from eight district public-sector hospitals. Eligibility criteria for facilities was ≥ 80 births every month; and for physicians, was that they had performed CSs. Women aged ≥ 18 years, providing consent, and delivering at a facility were included in the observation component; primigravid women delivering by CS were selected for the in-depth interviews. Quantitative data from observations were analysed using descriptive statistics. Following transcription and translation, a preliminary coding framework was devised for the qualitative data analysis. We combined both inductive and deductive approaches in our thematic analysis.

Results

In total, 306 labour situations were observed, and interviews were conducted with 16 physicians and 32 women who delivered by CS (16 emergency CS; 16 elective CS). In 92.5% of observations of physician–patient communication in the context of labour situations, the OPTION5 mean scores were low (5–25 out of 100) for presenting options, patient partnership, describing pros/cons, eliciting patient preferences and integrating patient preferences. Interviews found that non-clinical factors prime both physicians and patients in favour of CS prior to the clinical encounter in which the decision to perform a CS is documented. These interactions were both minimal in content and limited in purpose, with consent being an artefact of a process involving little communication.

Conclusions

Insufficient communication between physicians and patients is one of many factors driving increasing rates of caesarean section in Bangladesh. While this single clinical encounter provides an opportunity for practice improvement, interventions are unlikley to impact rates of CS without simultaneoulsy addressing physician, patient and health system contextual factors too.

Are childbirth location and mode of delivery associated with favorable early breastfeeding practices in hard to reach areas of Bangladesh?

BACKGROUND

Early initiation of breastfeeding within one hour of birth (EIBF) and no prelacteal feeding are WHO recommended practices for improving maternal and newborn health outcomes. Globally, EIBF can avert around 22% of newborn death. In recent years, Bangladesh has experienced increasing facility delivery coverage and cesarean section rates. However, the impact of these changes on early breastfeeding initiation in hard to reach areas (HtR) of the country is still poorly understood. Therefore, this study aimed to examine the independent associations between childbirth locations and mode of delivery with favorable early breastfeeding practices in four hard to reach areas of Bangladesh.

METHOD

We extracted data from a cross-sectional study conducted in four HtR areas of Bangladesh in 2017. A total of 2768 women, having birth outcomes in the past 12 months of the survey, were interviewed using structured questionnaires. EIBF and no prelacteal feeding were considered as favorable early breastfeeding practices. The categories of childbirth locations were defined by the place of birth (home vs. facility) and the delivery sector (public/NGO vs. private). The mode of delivery was categorized into vaginal delivery and cesarean section. Generalized linear models were used to test the independent associations while adjusting for potential confounders.

RESULTS

The prevalence of EIBF practices were 69.6%(95% CI:67.8-71.3); 72.2%(95% CI:67.8-71.3) among home births Vs 63.0%(95% CI:59.5%-66.4%) among facility births. Around 73.9% (95% CI:72.3-75.6) mother's in the study areas reported no-prelacteal feeding. Compared to home births, women delivering in the facilities had lower adjusted odds of EIBF (aOR = 0.51; 95%CI:0.35-0.75). Cesarean section was found to be negatively associated with EIBF (aOR = 0.20; 95%CI:0.12-0.35), after adjusting for potential confounders. We could not find any significant associations between the place of birth and mode of delivery with no prelacteal feeding.

DISCUSSIONS

This study found that facility births and cesarean deliveries were negatively associated with EIBF. Although the implementation of "Baby-Friendly Hospital Initiatives" could be a potential solution for improving EIBF and no prelacteal feeding practices, the challenges of reduced service availability and accessibility in HtR areas must be considered while devising effective intervention strategies. Future studies can explore potential interventions to promote early breastfeeding for facility births and cesarean deliveries in HtR areas.

Mean Platelet Volume in Type 2 Diabetes Male

The patient with diabetes mellitus and its complication is increasing in our country and all over the world. Altered platelet morphology and function have been reported in patient with DM. Mean platelet volume has been suggested as a newly emerging and independent risk marker for atherothrombosis and cardiovascular disease. The present study was carried out to assess the mean platelet volume in subjects with type 2 diabetes mellitus. The present study was a cross sectional analytic study and conducted in the Department of Physiology, Dhaka Medical College, Dhaka, Bangladesh from July 2013 to June 2014. A total number of 200 adult male subjects were selected with age ranging from 40 to 60 years. Among them, 100 subjects with type 2 diabetes mellitus were included in the case (Group B) and 100 healthy subjects with same age range were considered as control (Group A) for comparison. The subjects were selected from BIRDEM hospital Dhaka and personal contact from different areas of Dhaka city on the basis of exclusion and inclusion criteria. The study parameter was mean platelet volume and was measured in the Department of Hematology of BIRDEM hospital, Dhaka. The data were collected and recorded in pre-designed structured questionnaire by the researcher herself. For statistical analyses unpaired Student's 't' test was performed as applicable using SPSS for windows version 19. In this study, mean platelet volume was significantly (p<0.001) higher in the case group than that of control group. Therefore, estimation of mean platelet volume might be beneficial for prediction of future cardiovascular risk in adult diabetic male.

Bangladesh: a success case in combating childhood diarrhoea

BACKGROUND

Bangladesh had a large reduction in childhood deaths due to diarrhoeal disease in recent decades. This paper explores the preventive, promotive, curative and contextual drivers that helped Bangladesh achieve this exemplary success.

METHODS

Primary and secondary data collection approaches were used to document trends in reduction of Diarrhoea Specific Mortality Rate (DSMR) between 1980 and 2015, understand what policies and programmes played key roles, and estimate the contribution of specific interventions that were implemented during the period. Data acquisition involved relevant document reviews and in-depth interviews with key stake-holders. A systematic search of literature was undertaken to explore socio-economic, aetiological, behavioural, and nutritional drivers of diarrhoeal disease reduction in Bangladesh. Finally, we used LiST (Lives Saved Tool) to model the contributions of the relevant interventions during three time periods (1980-2015, 1980-2000 and 2000-2015), and to project the number of lives saved in 2030 (compared to 2015) if these interventions were implemented at near universal coverage (90%).

RESULTS

The factors which likely had the most impact on DSMR were the coordinated efforts of the Government of Bangladesh (GoB) with non-government organizations (NGOs) and the private sector that enabled swift implementation, at scale, of interventions like oral rehydration solution (ORS) and zinc, promotion of breastfeeding, handwashing and sanitary latrines (WASH), as well as improvements in female education and nutrition. Compared to 1980, we found ORS and reduction in stunting prevalence had the greatest impact on DSMR, saving roughly 70 000 lives combined in 2015. Until 2000, ORS had a higher contribution to DSMR reduction than reduction in stunting prevalence. This proportionate contribution was reversed during 2000-2015. At near universal coverage (90%) of combined direct diarrhoeal disease, nutrition and WASH interventions, we project that an additional 5356 deaths due to diarrhoea could be averted in 2030.

CONCLUSION

Bangladesh's achievement in reduction of DSMR highlights the important role of an enabling policy environment that fostered coordinated efforts of the public and private sectors and NGOs for maximal impact. To maintain this momentum, evidence-based interventions should be scaled up at universal coverage.

Older age at first tuberculosis diagnosis is associated with tuberculosis recurrence in HIV-negative persons

SETTING

Tuberculosis (TB) clinic in Durban, South Africa.

OBJECTIVE

To assess the factors associated with TB recurrence among human immunodeficiency virus (HIV) negative adults and children.

DESIGN

We conducted a retrospective longitudinal study from January 2000 to December 2012. We defined recurrence as a TB episode occurring within the study period after treatment completion or cure of a previous episode. We used a multivariable Poisson regression model to assess the factors associated with the number of recurrences among HIV-negative patients.

RESULTS

Among 17 941 patients with known HIV status, 3653 (20%) were HIV-negative; of these, 235 (6%) had one recurrence, 21 (1%) had two recurrences and 4 (0.1%) had three recurrences. The median follow-up time from the end of treatment for the first episode was 3.0 years (interquartile range 1.9-4.2). Age at the first TB episode was significantly associated with the number of TB recurrences: younger patients had the lowest rate of recurrence, with a steady increase in rates until age 40 years, after which rates stabilized.

CONCLUSIONS

TB recurrence rates among HIV-negative patients were higher at increased age at the first TB episode. Further translational studies are needed to clarify the factors that drive multiple TB recurrences in older age, including impaired immunity, the results of which have implications for TB vaccine development.

Quality of care during childbirth at public health facilities in Bangladesh: a cross-sectional study using WHO/UNICEF 'Every Mother Every Newborn (EMEN)' standards

Background

This manuscript presents findings from a baseline assessment of health facilities in Bangladesh prior to the implementation of the ‘Every Mother Every Newborn Quality Improvement’ initiative.

Methodology

A cross-sectional survey was conducted between June and August 2016 in 15 government health facilities. Structural readiness was assessed by observing the physical environment, the availability of essential drugs and equipment, and the functionality of the referral system. Structured interviews were conducted with care providers and facility managers on human resource availability and training in the maternal and newborn care. Observation of births, reviews of patient records and exit interviews with women who were discharged from the selected health facilities were used to assess the provision and experience of care.

Results

Only six (40%) facilities assessed had designated maternity wards and 11 had newborn care corners. There were stock-outs of emergency drugs including magnesium sulfate and oxytocin in nearly all facilities. Two-thirds of the positions for medical officers was vacant in district hospitals and half of the positions for nurses was vacant in subdistrict facilities. Only 60 (45%) healthcare providers interviewed received training on newborn complication management. No health facility used partograph for labour monitoring. Blood pressure was not measured in half (48%) and urine protein in 99% of pregnant women. Only 27% of babies were placed skin to skin with their mothers. Most mothers (97%) said that they were satisfied with the care received, however, only 46% intended on returning to the same facility for future deliveries.

Conclusions

Systematic implementation of quality standards to mitigate these gaps in service readiness, provision and experience of care is the next step to accelerate the country’s progress in reducing the maternal and neonatal deaths.

Competence of healthcare professionals in diagnosing and managing obstetric complications and conducting neonatal care: a clinical vignette-based assessment in district and subdistrict hospitals in northern Bangladesh

BACKGROUND

This study assesses the competency of maternal and neonatal health (MNH) professionals at district-level and subdistrict-level health facilities in northern Bangladesh in managing maternal and newborn complications using clinical vignettes. The study also examines whether the professional's characteristics and provision of MNH services in health facilities influence their competencies.

METHODS

134 MNH professionals in 15 government hospitals were interviewed during August and September 2016 using structured questionnaire with clinical vignettes on obstetric complications (antepartum haemorrhage and pre-eclampsia) and neonatal care (low birthweight and immediate newborn care). Summative scores were calculated for each vignette and median scores were compared across different individual-level and health facility-level attributes to examine their association with competency score. Kruskal-Wallis test was performed to identify the significance of association considering a p value<0.05 as statistically significant.

RESULTS

The competency of MNH professionals was low. About 10% and 24% of the health professionals received 'high' scores (>75% of total) in maternal and neonatal vignettes, respectively. Medical doctors had higher competency than nurses and midwives (score=11 vs 8 out of 19, respectively; p=0.0002) for maternal vignettes, but similar competency for neonatal vignettes (score=30.3 vs 30.9 out of 50, respectively). Professionals working in health facilities with higher use of normal deliveries had better competency than their counterparts. Professionals had higher competency in newborn vignettes (significant) and maternal vignettes (statistically not significant) if they worked in health facilities that provided more specialised newborn care services and emergency obstetric care, respectively, in the last 6 months.

CONCLUSIONS

Despite the overall low competency of MNH professionals, exposure to a higher number of obstetric cases at the workplace was associated with their competency. Arrangement of periodic skill-based and drill-based in-service training for MNH professionals in high-use neighbouring health facilities could be a feasible intervention to improve their knowledge and skill in obstetric and neonatal care.

Prevalence and determinants of initiation of breastfeeding within one hour of birth: An analysis of the Bangladesh Demographic and Health Survey, 2014

Background

Breastfeeding within one hour of birth is a critical component of newborn care and is estimated to avert 22% of neonatal mortality globally. Understanding the determinants of early initiation of breastfeeding (EIBF) is essential for designing targeted and effective breastfeeding promotion programmes. The aim of this study was to determine the prevalence and determinants of early initiation of breastfeeding among Bangladeshi women.

Methods

This paper analyses the data from the Bangladesh Demographic and Health Survey, 2014. Analysis was based on responses of women who had at least one live birth in the two years preceding the survey (n = 3,162) collected using a structured questionnaire. The primary outcome was breastfeeding initiation within one hour of birth ascertained by women’s self-report. Explanatory variables included woman’s age, education, religion, household wealth, place of residence and place of delivery, birth order, child’s size, antenatal care (ANC), postnatal care (PNC) and skin-to-skin contact. Associations between variables were assessed by simple and multivariable logistic regressions.

Results

Of the 3,162 recently delivered mothers, 51% initiated breastfeeding within one hour of delivery. Prevalence of EIBF varied significantly between different types of mode of delivery, among different geographical regions and among women who had PNC with their newborn. Women who had caesarean section (C-section) were less likely to initiate breastfeeding early after birth than women who had normal vaginal delivery (NVD) (AOR: 0.32, 95% CI 0.23 0.43; p value < 0.001). Women who had received PNC with their newborns within one hour of delivery were more likely to breastfeed their babies within one hour of birth compared to those who did not (AOR: 1.61, 95% CI 1.26 2.07; p value < 0.001). Mother’s age, education, religion, household wealth index, place of residence and place of delivery, birth order, number of antenatal visits, child’s size and skin-to-skin contact were not significantly associated with EIBF.

Conclusions

Findings from this study suggest that investing more effort in ensuring immediate PNC of mother-newborn pair can increase EIBF. Solutions should be explored to increase EIBF among mothers who undergo C-section as C-section is rising rapidly in Bangladesh. Further research is needed to explore the regional differences in the country, including specific cultural practices that influence EIBF.

Initiation of breastfeeding within one hour of birth and its determinants among normal vaginal deliveries at primary and secondary health facilities in Bangladesh: A case-observation study

BACKGROUND

Initiation of breastfeeding within one hour of birth can avert 22% of newborn mortality. Several factors influence breastfeeding practice including mothers' socio-demographic and obstetric characteristics, and factors related to time around child birth. This study explores breastfeeding initiation practices and associated influencing factors for initiating breastfeeding within one hour of birth in public health facilities of Bangladesh.

METHODS

In this study, normal deliveries were observed in 15 public health facilities from 3 districts in Bangladesh. Study participants were selected by convenient sampling i.e. delivery cases attending health facilities during the study period were selected excluding caesarean section deliveries. Among 249 mothers, time of initiation of breastfeeding was observed and its association was measured with type of health facility, privacy in delivery room, presence of separate staff for newborn, spontaneous breathing, skin-to-skin contact and postnatal contact of mother or newborn with health care providers within one hour after delivery. Data was collected during August-September, 2016. Kruskal-Wallis test was used to measure equality of median duration of breastfeeding initiation time among two or more categories of independent variables. Series of simple logistic regressions were conducted followed by multiple logistic regression to identify the determinants for breastfeeding initiation within one hour.

RESULTS

Among 249 mothers observed, 67% initiated breastfeeding within one hour of birth at health facilities and median time to initiate breastfeeding was 38 minutes (Inter-quartile range: 20-56 minutes). After controlling for maternal age as potential confounder, the odds of initiating breastfeeding within one hour of birth was significantly higher if mothers gave birth in district hospitals (AOR 3.5: 95% CI 1.5, 6.4), visual privacy was well-maintained in delivery room (AOR 2.6: 95% CI 1.2, 4.8), newborns cried spontaneously (AOR 4.9: 95% CI 3.4, 17.2), were put to skin-to-skin contact with mothers (AOR 3.4: 95% CI 1.9, 10.4) or were examined by health care providers in the facilities (AOR 2.4: 95% CI 1.3, 12.9).

CONCLUSIONS

In health facilities, initiation of breastfeeding within one hour is associated with some critical practices and events around the time of birth. With the global push toward facility-based deliveries, it is very important to identify those key factors, within the landscape of maternal and newborn care, which significantly enable health care providers and parents to engage in the evidence-based newborn care activities including early initiation of breastfeeding that will, in turn, reduce global rates of newborn mortality.

Isoniazid-monoresistant tuberculosis is associated with poor treatment outcomes in Durban, South Africa

SETTING

A large tuberculosis (TB) clinic in Durban, South Africa.

OBJECTIVE

To determine the association between isoniazid (INH) monoresistant TB and treatment outcomes.

DESIGN

We performed a retrospective longitudinal study of patients seen from 2000 to 2012 to compare episodes of INH-monoresistant TB with those of drug-susceptible TB using logistic regression with robust standard errors. INH-monoresistant TB was treated with modified regimens.

RESULTS

Among 18 058 TB patients, there were 19 979 TB episodes for which drug susceptibility testing was performed. Of these, 557 were INH-monoresistant and 16 311 were drug-susceptible. Loss to follow-up, transfer, and human immunodeficiency virus (HIV) co-infection (41% had known HIV status) were similar between groups. INH-monoresistant episodes were more likely to result in treatment failure (4.1% vs. 0.6%, P < 0.001) and death (3.2% vs. 1.8%, P = 0.01) than drug-susceptible episodes. After adjustment for age, sex, race, retreatment status, and disease site, INH-monoresistant episodes were more likely to have resulted in treatment failure (OR 6.84, 95%CI 4.29-10.89, P < 0.001) and death (OR 1.81, 95%CI 1.11-2.95, P = 0.02).

CONCLUSION

INH monoresistance was associated with worse clinical outcomes than drug-susceptible TB. Our findings support the need for rapid diagnostic tests for INH resistance and improved treatment regimens for INH-monoresistant TB.

Erythrocyte Glucose-6-Phosphate Dehydrogenase Level in Type 2 Diabetes Male

The patient with diabetes mellitus (DM) and its complication is increasing in our country and all over the world. There is also significant increase in the prevalence of erythrocyte glucose-6-phosphate dehydrogenase (eG6PD) deficiency in the men with longer duration of diabetes mellitus. To assess the eG6PD in type 2 diabetes male subjects to observe their enzyme status. This cross-sectional study was conducted in the Department of Physiology, Dhaka Medical College, Dhaka, Bangladesh from January 2011 to December 2011. Sixty male subjects with type 2 diabetes mellitus were selected with the age ranging from 40 to 60 years. Out of diabetic subjects, 30 (thirty) were with controlled (B1) and other 30 (thirty) with uncontrolled (B2) type 2 diabetes mellitus were selected from Outpatient Department of BIRDEM Hospital by random basis. And 30 age-matched, healthy non-diabetic male subjects were considered as control group for comparison. Erythrocyte G6PD level was measured by spectrophotometric method. Fasting Blood Glucose (FBG), HbA1c were measured by standard laboratory techniques in the laboratory of BIRDEM and Armed Forces Institute of Pathology (AFIP), Dhaka Cantonment, Dhaka. For statistical analysis unpaired Student's 't' test was performed. The result was expressed as Mean±SD among the groups. In this study, eG6PD level was significantly lower in both the study groups. This study concludes that eG6PD level decreases in male with diabetes mellitus.

Liver failure determines the outcome in patients of acute-on-chronic liver failure (ACLF): comparison of APASL ACLF research consortium (AARC) and CLIF-SOFA models

BACKGROUND AND AIMS

Acute-on-chronic liver failure (ACLF) is a progressive disease associated with rapid clinical worsening and high mortality. Early prediction of mortality and intervention can improve patient outcomes. We aimed to develop a dynamic prognostic model and compare it with the existing models.

METHODS

A total of 1402 ACLF patients, enrolled in the APASL-ACLF Research Consortium (AARC) with 90-day follow-up, were analyzed. An ACLF score was developed in a derivation cohort (n = 480) and was validated (n = 922).

RESULTS

The overall survival of ACLF patients at 28 days was 51.7%, with a median of 26.3 days. Five baseline variables, total bilirubin, creatinine, serum lactate, INR and hepatic encephalopathy, were found to be independent predictors of mortality, with AUROC in derivation and validation cohorts being 0.80 and 0.78, respectively. AARC-ACLF score (range 5-15) was found to be superior to MELD and CLIF SOFA scores in predicting mortality with an AUROC of 0.80. The point scores were categorized into grades of liver failure (Gr I: 5-7; II: 8-10; and III: 11-15 points) with 28-day cumulative mortalities of 12.7, 44.5 and 85.9%, respectively. The mortality risk could be dynamically calculated as, with each unit increase in AARC-ACLF score above 10, the risk increased by 20%. A score of ≥11 at baseline or persisting in the first week was often seen among nonsurvivors (p = 0.001).

CONCLUSIONS

The AARC-ACLF score is easy to use, dynamic and reliable, and superior to the existing prediction models. It can reliably predict the need for interventions, such as liver transplant, within the first week.

Augmented endothelial-specific L-arginine transport prevents obesity-induced hypertension

AIM

Hypertension is a major clinical complication of obesity. Our previous studies show that abnormal uptake of the nitric oxide precursor L-arginine, via the cationic amino acid transporter-1 (CAT1), contributes to endothelial dysfunction in cardiovascular disease. In this study, we tested the hypothesis that abnormal L-arginine transport may be a key mediator of obesity-induced hypertension.

METHODS

Mean arterial pressure (MAP) was monitored by telemetry in conscious wild-type (WT; n = 13) mice, and transgenic mice with endothelial-specific overexpression of CAT1 (CAT+; n = 14) fed a normal or a high fat diet for 20 weeks. Renal angiotensin II (Ang II), CAT1 mRNA and plasma nitrate/nitrite levels were then quantified. In conjunction, plasma nitrate/nitrite levels were assessed in obese normotensive (n = 15) and obese hypertensive subjects (n = 15).

RESULTS

Both genotypes of mice developed obesity when fed a high fat diet (P ≤ 0.002). Fat fed WT mice had 13% greater MAP and 78% greater renal Ang II content, 42% lesser renal CAT1 mRNA levels and 42% lesser plasma nitrate/nitrite levels, than WT mice fed a normal fat diet (P ≤ 0.02). In contrast, none of these variables were significantly altered by high fat feeding in CAT+ mice (P ≥ 0.36). Plasma nitrate/nitrite levels were 17% less in obese hypertensives compared with obese normotensives (P = 0.02).

CONCLUSION

Collectively, these data indicate that obesity-induced down-regulation of CAT1 expression and subsequent reduced bioavailability of nitric oxide may contribute to the development of obesity-induced hypertension.

Analysis of submicromolar concentrations of adenosine in plasma using reversed phase high-performance liquid chromatography

A method is described for the determination of adenosine in small samples of plasma (< 1 ml) using reversed-phase high-performance liquid chromatography (HPLC) in either a simple isocratic or a gradient elution system which gives a clear separation of adenosine from other plasma constituents. Acetone is used to deproteinize plasma and chloroform to remove unwanted lipid soluble material prior to HPLC. 6-Methyladenosine is used as an internal standard for making corrections for changes in concentration during sample processing. Adenosine in plasma could be reliably detected at concentrations lower than its minimum effector concentration as a vasodilator (4 x 10(-8) Mol l(-1) using the isocratic system and 1.9 x 10(-8) Mol l(-1) with gradient elution). The recoveries of adenosine added to blood at concentrations ranging from 2 x 10(-8) Mol l(-1) to 1.4 x 10(-6) Mol l(-1) were from 101.4 +/- 16.9% (n = 4) to 100.0 +/- 3.6% (n = 5). The present method provides a simple, sensitive and selective assay for submicromolar concentrations of adenosine in plasma with good recovery.

Assessing Environmental and Health Impact of Drought in the Northwest Bangladesh

Drought, the result of regional climatic variability is one of the dominant threats to environment. This study focuses on the biophysical, environmental and health issues concerning drought occurrence in northwest region of Bangladesh. Using both primary and secondary data, the analysis revealed that, during the drought period, rainfall as the dominant factor of supplying surface water and normalizing the dryness of the nature was almost 46% lower than the previous (normal) years. Similarly, average monthly sunshine hours in the drought year was about 7% higher compared to that of the normal year. On an average, groundwater level declined more than one meter compared to the previous years. Thus, many of the tubewells turned dry or failed to supply the required quantity of water for household and irrigation purposes. A significant number of surface water bodies including ponds, ditches, canals and streams had little volume of low quality water. In normal years, almost all households used hand tubewells (HTWs) as the major source of drinking water, while in the drought period only 90% households could use HTW water since substantial proportion of the HTWs turned dry. People had to collect drinking and domestic water from far distance to meet the basic requirements. Increase in temperature and prevalence of severe dust during drought periods compared to the normal years caused different health hazards including dysentery and diarrhoea due to unsafe drinking water. DOI: http://dx.doi.org/10.3329/jesnr.v4i2.10141 J. Environ. Sci. & Natural Resources, 4(2): 89-97, 2011  

Why are tuberculosis patients not treated earlier? A study of informal health practitioners in Bangladesh

SETTING

Five districts and four cities of Bangladesh.

OBJECTIVE

To study the role of informal health practitioners in delays in initiating tuberculosis (TB) treatment in new smear-positive TB patients.

DESIGN

A cross-sectional study of all patients registered within specific projects in Bangladesh using routine records from projects. Definitions were as follows: 1) total delay: duration from onset of symptoms to initiation of treatment; 2) patient delay: onset of symptoms to first visit to any practitioner; and 3) health system delay: first visit to practitioner to treatment initiation.

RESULTS

A total of 7280 cases were enrolled. Prolonged delay was calculated as ≥ 5 weeks for patient delay, ≥ 10 weeks for health system delay and ≥ 13 weeks for total delay. Prolonged patient delay was less frequent when patients first consulted informal as compared to qualified health practitioners (30% vs. 68%). Similar figures for prolonged health system delay were respectively 52% and 16%, while those for total delay were 47% and 27%. The differences were statistically significant (P < 0.05).

CONCLUSION

Patients seeking care from informal practitioners access care more promptly, but have prolonged delays in initiating treatment. Further investigation on how to involve these practitioners in the programme should be evaluated.

Community perceptions of tuberculosis: A qualitative exploration from a gender perspective

OBJECTIVE

To explore community laypersons' perspective on tuberculosis (TB)-related illness experiences, meanings, behaviours and impact with reference to gender.

STUDY DESIGN

Qualitative, conducted in rural Bangladesh.

METHODS

Eleven focus group discussions (FGDs) were conducted (six female and five male) in five subdistricts where the non-governmental organization BRAC operates. On average, seven purposively chosen poor, illiterate, non-TB patients participated in each FGD. Discussions were audiotaped, translated verbatim into English and analysed using MAXQDA software for qualitative data analysis, used it to assign codes to text segments to identify themes from participants' narratives.

RESULTS

TB was recognized as a deadly disease that could affect anyone. The discussants were fairly aware of the psychological, financial and social impacts of TB. Women faced with adverse consequences more often than men, such as trouble in ongoing and prospective marital affairs. Coughing up sputum in public by women is culturally frowned upon, resulting in enormous suffering. Women tended to describe the clinical features more vaguely than men, and often specified fewer characteristic symptoms such as blood in sputum.

CONCLUSIONS

The gender differences in the health and socio-economic impact of TB included perceived causality, curability, stigma, family and community support, fear of disclosure, and use of self-help or home remedies. Interactive health education covering various consequences of TB could be indispensable to changing negative beliefs.

Female-male differences at various clinical steps of tuberculosis management in rural Bangladesh

A registry data-based study of 3,600 patients systematically drawn from out-patient clinic, laboratory and tuberculosis (TB) treatment registers (1200 from each) examined female-male differences at various clinical steps of TB management and compared selective indicators with published results. Female-to-male ratios (FMR) declined at the following clinical steps: respiratory patients seeking out-patient care (0.81), TB suspects submitting sputum for testing (0.52) and smear-positive test results (0.38), but the decline ceased at treatment initiation (0.41). Compared to 1997, the FMR in 2000 had decreased for out-patient clinics and sputum submission for testing, but had increased for smear-positive test results and treatment initiation. More female than male patients who underwent treatment achieved cure (93% vs. 89%). Lower female representation at the different clinical steps of TB management persists.

Gender and socio-cultural determinants of delay to diagnosis of TB in Bangladesh, India and Malawi

SETTING

Tuberculosis (TB) control programmes in Bangladesh, India and Malawi.

OBJECTIVE

To compare the interval from symptom onset to diagnosis of TB for men and women, and to assess socio-cultural and gender-related features of illness explaining diagnostic delay.

DESIGN

Semi-structured Explanatory Model Interview Catalogue (EMIC) interviews were administered to 100 or more patients at each site, assessing categories of distress, perceived causes and help seeking. Based on time from initial symptoms to diagnosis of TB, patients were classified with problem delay (>90 days), timely diagnosis (< or =30 days) or moderate delay. EMIC interview data were analysed to explain problem delay.

RESULTS

The median interval from symptom onset to diagnosis was longest in India and shortest in Malawi. With adjustment for confounding, female sex (Bangladesh), and status of married woman (India) and housewife (Malawi) were associated with problem delay. Prominent non-specific symptoms--chest pain (Bangladesh) and breathlessness (Malawi)--were also significant. Cough in India, widely associated with TB, was associated with timely diagnosis. Sanitation as a perceived cause linked to poor urban conditions was associated with delayed diagnosis in India. Specific prior help seeking with circuitous referral patterns was identified.

CONCLUSION

The study identified gender- and illness-related features of diagnostic delay. Further research distinguishing patient and provider delay is needed.

Cultural epidemiology of TB with reference to gender in Bangladesh, India and Malawi

SETTING

TB control programmes in Bangladesh, India and Malawi.

OBJECTIVE

To identify and compare socio-cultural features of tuberculosis (TB) and the distribution of TB-related experiences, meanings and behaviours with reference to gender across cultures in three high-endemic low-income countries.

DESIGN

Approximately 100 patients at three sites were interviewed with in-depth semi-structured Explanatory Model Interview Catalogue (EMIC) interviews inquiring about patterns of distress, perceived causes and help-seeking behaviours in the context of illness narratives.

RESULTS

Female patients reported more diverse symptoms and men more frequently focused on financial concerns. Most patients reported psychological and emotional distress. Men emphasised smoking and drinking alcohol as causes of TB, and women in Malawi reported sexual causes associated with HIV/AIDS. In Bangladesh, exaggerated concerns about the risk of spread despite treatment contributed to social isolation of women. Public health services were preferred in Malawi, and private doctors in India and Bangladesh.

CONCLUSION

Cross-site analysis of these studies has identified features of TB that influence the burden of disease and are likely to affect timely help seeking and adherence to treatment. Health systems benefit from sex-disaggregated epidemiological data complemented by cultural epidemiological study, which together clarify the role of gender and contribute to the knowledge base for TB control at various levels.

Gender and socio-cultural determinants of TB-related stigma in Bangladesh, India, Malawi and Colombia

SETTING

Tuberculosis (TB) control programmes in Bangladesh, India, Malawi and Colombia.

OBJECTIVE

Assess indicators of TB-related stigma and socio-cultural and gender-related features of illness associated with stigma.

DESIGN

Semi-structured Explanatory Model Interview Catalogue (EMIC) interviews were administered to 100 or more patients at each site, assessing categories of distress, perceived causes and help seeking. Indicators of self-perceived stigma were analysed individually and in a validated index, which was compared across sites and between men and women at each site. Cultural epidemiological explanatory variables for stigma and interactions with female sex were analysed at each site. Qualitative illness narratives were examined to explain the role and context of explanatory variables.

RESULTS

The overall stigma index was highest in India, lowest in Malawi and greater for women in Bangladesh. In India and Malawi, women were more likely to be concerned about impact on marital prospects. Associations with HIV/AIDS were linked to TB stigma in Malawi, where sexual contact as a perceived cause was more associated with stigma for men and less for women.

CONCLUSION

Stigma both influences and indicates the effectiveness of TB control. Cultural epidemiological methods clarify cross-cutting and local features of stigma and gender for TB control.

Identification of ras targets using a genetic approach

The Sevenless receptor tyrosine kinase is required for the development of the R7 photoreceptor cell in the Drosophila eye. Several components of the Sevenless signal transduction pathway have been identified in genetic screens for enhancers/suppressors of the sevenless phenotype. These studies suggest that activation of Sevenless leads to stimulation of Ras1 activity, whereas Gap1 appears to act as a negative regulator of the pathway. Inactivation of the Gap1 locus causes transformation of non-neuronal cone cells into supernumerary R7 cells. This same mutant phenotype is observed when activated Ras1 is expressed under the control of the sevenless promoter. While studies in other organisms have demonstrated a role for ras gene products in signal transduction, the effectors of Ras activity have not yet been identified. We are carrying out genetic screens for enhancers and suppressors of the Gap1 and activated Ras1 phenotypes in the hope of identifying genes encoding some of these effectors. We are conducting chemical mutagenesis screens and have also screened existing collections of P element lines. A molecular characterization of the most promising mutations is in progress.

Bacterial safety of flash-heated and unheated expressed breastmilk during storage

Heat-treated breastmilk is one infant-feeding option recommended by the WHO to reduce mother-to-child transmission of HIV in developing countries. Flash-heat, a simple pasteurization method that a mother could perform in her home, has been shown to inactivate cell-free HIV-1. Since heating may affect the naturally occurring antimicrobial properties found in breastmilk, storing heated breastmilk may present a safety issue in resource-poor settings due to lack of refrigeration and potential contamination. To address this, we investigated the ability of flash-heat to eliminate bacteria and to prevent growth over time compared with unheated breastmilk. We collected breastmilk samples from 38 HIV positive mothers in South Africa and aliquoted them to flash-heated and unheated controls. Samples were stored at room temperature for 0, 2, 6 and 8 h and then plated and incubated for 24 h at 37 degrees C in CO(2). We performed total colony counts and identified Escherichia coli, Staphylocuccus aureus and Group A and Group B streptococci. Unheated samples had a significantly higher number of samples positive for bacterial growth at each time point (p < 0.0001), as well as mean colony-forming units (CFU)/ml in those samples that were positive at each time point (p < 0.0001). In addition, unheated samples had a significantly higher rate of bacterial propagation over time than flash-heated samples when comparing log values of CFU/ml across 0-8 h (p < 0.005). No pathogenic growth was observed in the flash-heated samples, while the unheated samples showed growth of E. coli (n = 1) and S. aureus (n = 6). Our data suggest that storage of flash-heated breastmilk is safe at room temperature for up to 8 h.

Poverty status and health equity: evidence from rural Bangladesh

Many studies have examined the health inequities between different social groups, often measured by individual independent variables, such as education, gender, ethnicity, geography, rich, poor, etc. Although inequities are increasingly widening, a few studies have looked at the health inequity between different poverty groups within the poor. The present study, using equity terms, examined the use of health services in two rural areas of Bangladesh. Using a multistage sampling method, a total of 80 villages were selected from the Bogra and Dinajpur sadar thanas (subdistricts) for the study. A total of 4003 households in these villages were visited for data collection on mortality and fertility, while data related to use of health services was collected from a subsample of 1032 households. A poverty index, constructed using three variables (household landholding, education level of head of household, and self-rated categorization of household's annual food security), categorized the households into three groups: extreme poor, moderate poor and non-poor. Overall, the data revealed considerable inequities in many study indicators between the poor and the non-poor. However, inequities of varying degrees were also found between the extreme poor and the moderate poor. Lower levels of inequities were found between the poor and the non-poor in the use of health services, which were easily accessible and free of charge (immunization, vitamin A capsule, etc.). On the whole, the extreme poor were less likely to use health services than the moderate poor and the non-poor, suggesting the need for a more appropriate programme to address their pressing health needs.

HIV Lipodystrophy Case Definition using Artificial Neural Network Modelling

Objective

A case definition of HIV lipodystrophy has recently been developed from a combination of clinical, metabolic and imaging/body composition variables using logistic regression methods. We aimed to evaluate whether artificial neural networks could improve the diagnostic accuracy.

Methods

The database of the case-control Lipodystrophy Case Definition Study was split into 504 subjects (265 with and 239 without lipodystrophy) used for training and 284 independent subjects (152 with and 132 without lipodystrophy) used for validation. Back-propagation neural networks with one or two middle layers were trained and validated. Results were compared against logistic regression models using the same information.

Results

Neural networks using clinical variables only (41 items) achieved consistently superior performance than logistic regression in terms of specificity, overall accuracy and area under the ROC curve. Their average sensitivity and specificity were 72.4 and 71.2%, as compared with 73.0 and 62.9% for logistic regression, respectively (area under the ROC curve, 0.784 vs 0.748). The discriminating performance of the neural networks was largely unaffected when built excluding 13 parameters that patients may not have readily available. The average sensitivity and specificity of the neural networks remained the same when metabolic variables were also considered (total 60 items) without a clear advantage against logistic regression (overall accuracy 71.8%). The performance of networks considering also body composition variables was similar to that of logistic regression (overall accuracy 78.5% for both).

Conclusions

Neural networks may offer a means to improve the discriminating performance for HIV lipodystrophy, when only clinical data are available and a rapid approximate diagnostic decision is needed. In this context, information on metabolic parameters is apparently not helpful in improving the diagnosis of HIV lipodystrophy, unless imaging and body composition studies are also obtained.

Rapid assessment of the prevalence of lower limb clinical rickets in Bangladesh

This study attempted to measure the prevalence of lower limb clinical rickets using a rapid assessment methodology in Cox's Bazaar, a coastal district of Bangladesh. The study populations were drawn from 28 random villages representing all seven 'thanas' (subdistricts) of the district. Data were collected on 25,891 children and young people aged 1-20 years in two phases. In the first phase, 30 trained, local, non-medical people listed 490 children suffering from visible signs of any physical disability. To achieve this, they demonstrated a multicolored poster showing the features of lower limb clinical rickets to key informants in the villages. In the second phase, two teams of medically trained people (physicians), each with one male and one female, validated the above cases for rickets. They verified and validated 278 cases in five thanas. Due to inclement weather and floods, they could not visit the other two thanas. Based on these data, the adjusted prevalence rates for lower limb clinical rickets were calculated to be 931 per 100,000 population (95% confidence intervals 795-1067). The prevalence was highest (1215) in children aged 1-4 years and lowest (498) amongst 17-20 year olds. Females had lower prevalence than males. Based on the study experience, a quick investigation using a similar methodology was performed in five other districts (Sunamganj, Noakhali, Bhola, Jessore and Gaibandha), and clinical signs of lower limb rickets were found in Sunamganj and Jessore. It thus indicates that rickets may be endemic, not only in Cox's Bazaar but also in some other parts of Bangladesh. The methodology used for this study was found to be rapid, simple, replicable and inexpensive.

Metabotropic glutamate receptor subtypes 1 and 5 are activators of extracellular signal-regulated kinase signaling required for inflammatory pain in mice

Metabotropic glutamate receptors are expressed abundantly in the spinal cord and have been shown to play important roles in the modulation of nociceptive transmission and plasticity. Most previous studies have focused on the group I metabotropic glutamate receptors (mGluR1 and mGluR5) and activation of phospholipase C signaling by these receptors in modulating nociception. Recently, it was shown that the extracellular signal-regulated kinases (ERKs)/mitogen-activated protein kinases are activated in spinal cord dorsal horn neurons in response to stimulation of nociceptors and that ERK signaling is involved in nociceptive plasticity. In the present studies, we sought to test the hypothesis that group I mGluRs modulate nociceptive transmission or plasticity via modulation of ERK signaling in dorsal horn neurons. We show that activation of mGluR1 and mGluR5 leads to activation of ERK1 and ERK2 in the spinal cord. Furthermore, we find that inflammation-evoked ERK activation, which is required for nociceptive plasticity, is downstream of mGluR1 and mGluR5. Finally, we show colocalization of group I mGluRs with activated ERK in dorsal horn neurons. These results show that mGluR1 and mGluR5 are activated in dorsal horn neurons in response to peripheral inflammation and that activation of these group I mGluRs leads to activation of ERK1 and ERK2, resulting in enhanced pain sensitivity.

Peripheral group I metabotropic glutamate receptors modulate nociception in mice

The metabotropic glutamate receptors (mGluRs) are found throughout the central nervous system, where they modulate neuronal excitability and synaptic transmission. Here we report the presence of phospholipase C-coupled group I mGluRs (mGluR1 and mGluR5) outside the central nervous system on peripheral unmyelinated sensory afferents. Given their localization on predominantly nociceptive afferents, we investigated whether these receptors modulate nociceptive signaling, and found that agonist-induced activation of peripheral group I mGluRs leads to increased sensitivity to noxious heat, a phenomenon termed thermal hyperalgesia. Furthermore, group I mGluR antagonists not only prevent, but also attenuate established formalin-induced pain. Taken together, these results suggest that peripheral mGluRs mediate a component of hyperalgesia and may be therapeutically targeted to prevent and treat inflammatory pain.

Drosophila p53 is a structural and functional homolog of the tumor suppressor p53

The importance of p53 in carcinogenesis stems from its central role in inducing cell cycle arrest or apoptosis in response to cellular stresses. We have identified a Drosophila homolog of p53 ("Dmp53"). Like mammalian p53, Dmp53 binds specifically to human p53 binding sites, and overexpression of Dmp53 induces apoptosis. Importantly, inhibition of Dmp53 function renders cells resistant to X ray-induced apoptosis, suggesting that Dmp53 is required for the apoptotic response to DNA damage. Unlike mammalian p53, Dmp53 appears unable to induce a G1 cell cycle block when overexpressed, and inhibition of Dmp53 activity does not affect X ray-induced cell cycle arrest. These data reveal an ancestral proapoptotic function for p53 and identify Drosophila as an ideal model system for elucidating the p53 apoptotic pathway(s) induced by DNA damage.

Training and retaining Shasthyo Shebika: reasons for turnover of community health workers in Bangladesh

Shasthyo Shebikas (SS) are community health workers forming the core of BRAC's Essential Health Care (EHC) programme. The SS dropout was 44 percent for study area and 32 percent for EHC programme. The SS discontinued their work due to lack of time, lack of "profit", and family's disapproval. The effects of the dropouts were decreased achievement of targets, and a loss of money in the amount of $24 (U.S.) per dropout SS for their training and supervision. The SS retention may increase if EHC strictly adheres to its existing guidelines when selecting trainees, and if it highlights during SS training that SS; s first and foremost role will be as that of a volunteer and then of a salesperson.

Beta-adrenoceptors in vascular capacitance responses to unloading of carotid baroreceptors in anesthetized dogs

The role of beta- and alpha-adrenoceptors in the total vascular capacitance responses to changing pressure in vascularly isolated carotid sinuses of anesthetized and atropinized dogs was investigated. A change in vascular capacitance was determined by measuring the shift of blood in and out of a reservoir that was connected to the aorta and maintained at a constant pressure. Changes in carotid sinus pressure from 135 to 57 mmHg and back to 137 mmHg resulted in a rapid vascular capacitance response of approximately 30 ml in the absence of adrenoceptor antagonists. Administration of a beta2-adrenoceptor antagonist (ICI-118551) caused a significant enhancement of the capacitance responses to similar decreases and increases in carotid sinus pressure (approximately 130%). Administration of a beta1-adrenoceptor antagonist (CGP-20712A) did not cause any further enhancement of the responses. However, an alpha-blocker (phentolamine) reduced the responses by 75%. The results suggest that in the presence of a beta2-adrenoceptor antagonist vascular capacitance responses to loading and unloading of baroreceptors are greatly enhanced and that patients suffering from orthostatic syncope may benefit from this kind of drug.