Exploring the reproductive features of Clupisoma garua from Ganges River, Bangladesh: insights into eco-climatic factors for sustainable management and advancements in aquaculture practices

The Garua bacha, Clupisoma garua, holds considerable commercial and nutritional significance as a fish species. This study investigates the relationships between GSI (gonadosomatic index) and eco-climatic conditions, and provides comprehensive insights into several facets of reproduction, such as size at first sexual maturity (Lm), spawning season, peak spawning period, and proposes sustainable management strategies for C. garua in the Ganges River, northwestern, Bangladesh. Since January to December 2017, 570 female individuals have been gathered from the Ganges River using cast nets, gill nets, and square lift nets on a monthly basis. The total length (TL) of the specimens varied from 3.90 to 26.30 cm. Lm was estimated as 14.30 cm based on the results of the TL vs. GSI, MGSI (modified gonadosomatic index), DI (Dobriyal index), 14.00 cm through TL-FL regressions, and 15.18 cm depending on Lmax for this species. Furthermore, the spawning period was observed from May to August, peaking in June and July, based on greater GSI, MGSI, and DI values. Throughout the peak spawning season, there was not a significant differ from a value of 100 in the relative weight (WR) of the female species. During the spawning season, a substantial association between temperature and GSI (p = 0.0038); rainfall and GSI (p = 0.0043); DO and GSI (p = 0.0043); pH and GSI (p = 0.0002); and alkalinity and GSI (p = 0.0001) was detected. Analyzing a 55-year data series (1964-2018), it became clear that an increase in average air temperature of 0.0289 °C and a decrease in rainfall of 2.988 mm per year might possibly delay the spawning season of this species. As a consequence, the results of this study provide crucial information for developing management strategies to safeguard C. garua populations in the Ganges River and its adjacent ecosystems.

Association of CSF Total Protein with Clinical Heterogeneity, Disease Severity and Electrophysiological Pattern in GBS Patients

Guillain-Barre Syndrome (GBS) is considered as an immune mediated inflammatory disease of peripheral nerves and nerve roots. The significance of CSF total protein (CSF-TP) in subtypes of Guillain-Barre syndrome has not been well established. This observational, cross sectional study's aim was to identify association of CSF total protein with clinical heterogeneity, disease severity and electrophysiological subtypes in GBS patients. This study was carried out in the Department of Neurology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Bangladesh from September 2017 to February 2019 on 50 (fifty) admitted GBS patients as per inclusion and exclusion criteria. About 3-5 ml of CSF was taken around 10±2 days from disease onset for detection CSF cell count and protein. Pattern of clinical presentation, disability status by Hughes scale and NCS findings of these patients was documented. Mean CSF-TP were substantially higher for Sensori-motor GBS (195.42 mg/dl) and GBS with cranial involvement (226.12 mg/dl) than that of GBS with motor (134.00 mg/dl) and autonomic involvement (155.21 mg/dl). Mean CSF total protein (CSF-MTP) in severely ill GBS patients (Grade-IV) was 217.04 mg/dl and very severely ill GBS patients (Grade-V) was 138.00mg/dl which was significantly higher than mean CSF total protein in mild GBS patients (CSF-MTP: 99.86mg/dl) and moderately ill GBS patients (CSF-MTP: 172.00 mg/dl). Mean CSF total protein is 245.00mg/dl in AIDP which is also higher than mean CSF total protein of AMAN (153.36 mg/dl) and AMSAN (165.17mg/dl). CSF-TP is thought to be a sensitive test for GBS in the second week after onset, but it may be a reliable predictor of clinical severity. There is a significant association of CSF-TP elevation with demyelinating electrophysiologic pattern.

Serum Uric Acid and Serum Lipid Levels in Patients with Acute Ischemic Stroke Admitted in Mymensingh Medical College Hospital

Stroke is the second-leading cause of death and also a leading cause of combined death and disability. In Bangladesh, stroke prevalence is 11.39 per 1000 population, but highest prevalence of stroke is 14.71 per 1000 population in the Mymensingh division. Hyperuricemia has been reported as an independent risk factor for stroke in different studies and a significant association between serum uric acid and dyslipidemia has also been stated. On the contrary, some studies suggest that uric acid has a neuroprotective role. This cross-sectional study was completed in the Medicine Department of Mymensingh Medical College Hospital, Mymensingh, Bangladesh from March 2021 to January 2023. In this cross-sectional study, 352 adult acute ischemic stroke patients were included from the Medicine Department of Mymensingh Medical College Hospital. Serum uric acid and fasting serum lipid levels were measured within 48 hours of admission. The mean age ±SD of the respondents was 61.9±12.8 years. Hyperuricemia was found among 18.2% of respondents, whose mean ±SD serum uric acid was 5.7±1.9 mg/dl. Dyslipidemia was present in 88.4% of patients. The mean ±SD of the National Institutes of Health Stroke Scale (NIHSS) score was 12.0±5.9. Most of the patients (65.6%) were suffering from moderate stroke, followed by moderate to severe stroke (15.1%), severe stroke (10.8%) and minor stroke (8.5%). After multiple linear regressions, the independent variables age, gender, serum uric acid and total cholesterol were found to be significant predictors of the NIHSS score of the respondents. In conclusion, the majority of acute ischemic stroke patients have an association with dyslipidemia, but only around one-fifth of patients have hyperuricemia. There is a significant association of high serum uric acid and high serum total cholesterol with stroke severity (NIHSS score). But low-density lipoprotein cholesterol, high-density lipoprotein cholesterol and, triglycerides have no association with stroke severity.

Species identification, reproductive biology, and nutritional value of marine shellfish (Meretrix lyrata) in the Bay of Bengal

Meretrix lyrata which is under the family of Veneridae and under the order of Venerida, is a nutritionally and economically important edible mussel in Bangladesh. However, studies on species identification and nutritional value in M. lyrata are scarce. Therefore, a detailed investigation was conducted on (i) species identification of the common edible mussel through DNA-barcoding and morphometrics, (ii) reproductive features, such as size at sexual maturity, spawning, and peak-spawning seasons under different environmental factors, and (iii) nutritional status through proximate analysis of M. lyrata mussel collected from the Bay of Bengal, Bangladesh. The results indicated that the size at sexual maturity for M. lyrata was 4.2 cm and the spawning seasons were significantly affected by the dissolve oxygen and salinity. The study also demonstrated that the spawning of M. lyrata occurred from January to June and December while peak spawning season was May in the Bay of Bengal. The higher protein and moisture contents with lower fat in M. lyrata indicated that are value-added seafood with higher nutritional values for consumers.

Effect of Milk Intake and Calcium-Vitamin D Supplementation on Serum Vitamin D Status

Vitamin D is important for health and disease. Milk is a good natural source of it, and calcium-vitamin D supplements are widely available over-the-counter and prescribed in clinical practice. But the effect of milk intake and calcium-vitamin D supplementation on serum vitamin D status is not known. This cross-sectional study was done to see the relationship between vitamin D status and milk intake or oral calcium-vitamin D supplementation using a structured questionnaire and carried out in a private consultation centre of Dhaka city, the capital of Bangladesh from July 2017 to March 2018. Serum 25-hydroxyvitamin D [25(OH)D] level was measured by radioimmunoassay. Out of 259 patients, 64.1% had vitamin D deficiency defined as serum 25(OH)D level <20ng/mL. Sixty one percent of those who had serum 25(OH)D level <20ng/mL did not take milk or milk products, while 53.0% of those having 25(OH)D level ≥20ng/mL did not take milk. Approximately 89.0% of those who had serum 25(OH)D level <20ng/mL did not take oral calcium-vitamin D, whereas 72.0% of those having 25(OH)D level ≥20ng/mL did not take oral calcium-vitamin D (p=0.001). In the multiple logistic regression analysis, there were significantly increased odds of vitamin D deficiency for females as compared to males [odds ratio (OR) 2.48, 95% confidence interval (CI) 1.34-4.56] and not taking oral vitamin D as compared to taking oral vitamin D (OR 3.56, 95% CI 1.74-7.28). Vitamin D deficiency is widely prevalent. Lack of milk intake and calcium-vitamin D supplementation are more commonly associated with serum vitamin D deficiency, and calcium-vitamin D supplementation is specially important in females.

Role of Rehabilitation Exercise on Myofascial Pain Syndrome Causing Upper Back Pain

Upper back pain is as painful or troublesome as the pain in the lower back or the neck. Myofascial pain syndrome which is most common cause of upper back pain is characterized by localized musculoskeletal pain and tenderness in association with trigger points. The aim of the study was to correlate the improvement of myofascial pain syndrome patients with proper and timely physical therapy. This quasi experimental study was conducted in the department of Physical Medicine and Rehabilitation, Bangabandhu Sheikh Mujib Medical University (BSMMU), Bangladesh, from 1st January 2008 to 31st August 2008 to see the role of rehabilitation exercise on myofascial pain syndrome causing upper back pain. Sixty (60) patients of myofascial pain syndrome causing upper back pain were randomly assigned for treatment; out of which 23(38.33%) were male and 37(61.66%) were female. The male and female ratio was 1:1.6. The patients selected for the trial were divided into two groups: Group A and Group B. In group A (n=28) the patients were treated with thermotherapy- Microwave diathermy, non-steroidal anti inflammatory drugs and activities of daily living instructions and in Group B (n=32) with same interventions in addition to rehabilitation exercises. Treatment duration was 6 weeks. The difference of treatment improvement was statistically significant (p<0.05) from 1st week up to 6th week. After complete course of treatment 67.86% patients in Group A and 78.13% patients in group B reported improvement. So rehabilitation exercises can be a valuable adjunct to other modalities of treatment of myofascial pain syndrome causing upper back pain.

Evaluation of Serum Iron Profile in Patients with Pulmonary Tuberculosis

Approximately 10.0% of tuberculosis (TB) Infected individuals develop clinical disease in the absence of immune suppression suggests that individual factors may play a role in the response to infection. Body's immune function is boosted by micronutrient and also plays a major role in response to tubercular infection. Someone, may argue that cell mediated immunity is compromised in iron deficiency before anemia becomes apparent. This descriptive observational study intended to assess serum iron profile in patients suffering from pulmonary tuberculosis. This study included 56 newly diagnosed sputum smear positive and negative pulmonary tuberculosis patients as per inclusion and exclusion criteria and was conducted at the department of the Internal Medicine, Bangabandhu Sheikh Mujib Medical University (BSMMU), Bangladesh with the collaboration of the Biochemistry department, BSMMU, Bangladesh from February 2017 to January 2018. Collected data were recorded in a structured questionnaire and compiled and appropriate analyses were done by using computer-based software Statistical Package for Social Sciences (SPSS) version 23.0. Out of 56 patients, majority was young and at reproductive age, male was predominant (78.6%) with a male to female ratio of 3.7:1. More than three fourth 43(81.0%) patients were found to have low serum iron concentration. Majority 45(80.4%) patients had normal serum TIBC, 6(10.7%) had low serum total iron binding capacity (TIBC) and 5(8.9%) had high serum TIBC. Almost two third 36(64.3%) patients had low serum transferrin saturation and 20(35.7%) had normal serum transferrin saturation. Majority 31(55.4%) patients had normal serum ferritin, 2(3.6%) had low serum ferritin and 23(41.1%) had high serum ferritin. Serum iron concentration and serum ferritin were significantly associated with chest x-ray abnormalities (p<0.01). Half of the patients were smear positive for acid fast bacilli (AFB) (50.0%). No significant association was found between sputum positive for AFB with iron profile status. In smear positive pulmonary tuberculosis patients, more than three fourth (78.6%) patients had low serum iron concentration at baseline and majority 20(80.0%) patients had normal serum iron concentration after 2(two) months. Mean serum iron concentration was 41.8±17.6mcg/l in baseline and 70.4±29.7mcg/l in at 2(two) month. More than sixty percent (60.7%) patients had low serum transferrin saturation at baseline and 20(80.0%) patients had normal serum transferrin saturation after 2(two) months. Mean serum transferrin saturation was 18.1±7.6% at baseline and 31.2±19.4% in at 2(two) months. After 2(two) months follow up serum iron concentration and serum transferrin saturation had significant improvement (p<0.05). Significant iron deficiency status occurred in pulpmonary tuberculosis and which improved after anti-tubercular treatment without iron supplementation.

Prevalence of Carotid Artery Stenosis in Patients Undergoing Coronary Artery Bypass Grafting: A Single-Centre Study in Bangladesh

Coronary artery disease (CAD) is one of the important causes of mortality worldwide. South Asians, notably Indians are unduly prone to develop CAD with its incidence being doubled in the last three decades among both rural and urban settlers. CAD prevalence of in Bangladesh is not known. There are merely a limited number of small-scale epidemiological studies are existing. Recent data indicates CAD prevalence in our country to lie between 1.85-3.4% in rural and 19.6% in an urban sample of working professionals. Despite marked disparity in values, the disease seems to be in rising trend. Patients with concomitant CAD and carotid artery disease are at increased risk of developing peri-operative neurological events including stroke. By far, the prevalence of carotid artery disease in candidates of CABG has not yet been determined in our country. There is a lack of pre-operative guidelines as well for the necessary vascular investigations that should be performed on CABG candidates before they go to the operation table. Pre-operative non-invasive carotid Doppler ultrasonography is a useful screening tool for carotid artery disease in all patients undergoing CABG. This was a cross-sectional observational study, was conducted in the Radiology & Imaging department of Ibrahim Cardiac Hospital & Research Institute, Dhaka, Bangladesh from January 2017 to June 2017. The present cross-sectional study was intended to determine the prevalence of concurrent occurrence of carotid and coronary artery disease in elderly patients undergoing CABG. Total 210 elderly (from 60 & above) patients scheduled for CABG taken as study population. There was bilateral carotid atherosclerotic plaque in 15(12.2%) patients. Right carotid plaque was in 69(56.0%) patients, left carotid plaque in 54(43.9%) patients. Carotid stenosis grading was done in percentage (%). There was significant (>50.0%) stenosis of right carotid system in 12 patients (17.4%) and significant stenosis of left carotid system in 18 patients (33.3%). Right carotid system & bulb was the most common site of plaque formation. We can conclude from this study that a substantial proportion of patients after a particular age possess carotid artery disease simultaneously with coronary artery disease, routine evaluation of carotid arteries of the elderly patients scheduled for CABG is strongly suggested.

Assessment of Serum Homocysteine Level to Predict Early Prognosis of Ischaemic Stroke

Cerebrovascular disease is the third most familiar cause of mortality worldwide and in Bangladesh. The reported prevalence of stroke in Bangladesh is 0.3%. Age, high serum glucose, elevated admission blood pressure, fever, large infarction size, and hyperhomocysteinemia has been reported to be risk factor for early post-stroke neurological deterioration. Early serum homocysteine level estimation can predict the early prognosis of ischemic stroke. In a developing country like Bangladesh, an earlier stroke outcome prediction for guiding therapeutic approach is essential. This study aimed to specify the role of estimating serum homocysteine during the early phase of acute ischemic stroke to assume an early prognosis that would guide- a management plan, the need to stay in the hospital and the need for intervention. This cross-sectional descriptive study was performed at the Department of Medicine, Mymensingh Medical College Hospital, Bangladesh from October 2021 to April 2022. Radiologically confirmed all ischemic stroke patients admitted at the Department of Medicine, Mymensingh Medical College Hospital, during the study period fulfilling the inclusion and exclusion criteria were included in this study. Non-probability purposive sampling technique was used. Data was collected using a pre-designed case record form. Quantitative data were represented as mean and standard deviation and qualitative data as frequency and percentage. The comparison was made by Chi-square test and independent samples t-test using SPSS (version 26.0). During the study period, among 716 stroke patients, 59 ischemic stroke patients were included in this study. The mean age of the patients was 64.0±11.72 years. After 72 hours of supportive treatment, early neurological outcomes were observed using NIHSS scoring. Out of 59 patients, the condition of 45(76.0%) patients improved or remained stable (END-) and the state of 14(24.0%) patients worsened (END+). Elderly age-raised temperature and elevated blood glucose level are known to increase infarction size, but only elevated temperature (p value 0.009) has statistical significance in this study. The mean homocysteine level ±SD was 20.22±6.95μmol/L, which is above the normal (<15μmol/L). The level was above average for both outcome groups. Serum homocysteine level was significantly higher in END(+) group (31.59±2.98μmol/L) than END(-) group (16.69±2.66μmol/L) and p value was <0.001.

Community Based Rehabilitation for Accessibility of Disable Person in a Low and Middle-income Country like Bangladesh

Not Available.

Pick and place process for uniform shrinking of 3D printed micro- and nano-architected materials

Two-photon polymerization lithography is promising for producing three-dimensional structures with user-defined micro- and nanoscale features. Additionally, shrinkage by thermolysis can readily shorten the lattice constant of three-dimensional photonic crystals and enhance their resolution and mechanical properties; however, this technique suffers from non-uniform shrinkage owing to substrate pinning during heating. Here, we develop a simple method using poly(vinyl alcohol)-assisted uniform shrinking of three-dimensional printed structures. Microscopic three-dimensional printed objects are picked and placed onto a receiving substrate, followed by heating to induce shrinkage. We show the successful uniform heat-shrinking of three-dimensional prints with various shapes and sizes, without sacrificial support structures, and observe that the surface properties of the receiving substrate are important factors for uniform shrinking. Moreover, we print a three-dimensional mascot model that is then uniformly shrunk, producing vivid colors from colorless woodpile photonic crystals. The proposed method has significant potential for application in mechanics, optics, and photonics.

Occurrences, sources, fate and impacts of plastic on aquatic organisms and human health in global perspectives: What Bangladesh can do in future?

Bangladesh is not an exception to the growing global environmental problem of plastic pollution. Plastics have been deemed a blessing for today's world thanks to their inexpensive production costs, low weight, toughness, and flexibility, but poor biodegradability and massive misuse of plastics are to blame for widespread contamination of the environmental components. Plastic as well as microplastic pollution and its adverse consequences have attracted significant investigative attention all over the world. Plastic pollution is a rising concern in Bangladesh, but scientific studies, data, and related information are very scarce in numerous areas of the plastic pollution problem. The current study examined the effects of plastic and microplastic pollution on the environment and human health, and it examined Bangladesh's existing knowledge of plastic pollution in aquatic ecosystems in light of the rapidly expanding international research in this field. We also made an effort to investigate the current shortcomings in Bangladesh's assessment of plastic pollution. This study proposed several management approaches to the persistent plastic pollution problem by analyzing studies from industrialized and emerging countries. Finally, this work pushed investigators to investigate Bangladesh's plastic contamination thoroughly and develop guidelines and policies to address the issue.

Short-term Treatment Outcome of Patients with Acute ST-elevation Myocardial Infarction in a Tertiary Care Hospital

Outcome of acute ST-elevation myocardial infarction patients varies time to time. The present study was intended to find out the short-term treatment outcome of the patients admitted in hospital. This descriptive study was carried out in Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from 15 January 2014 to 14 July 2014. A total of 100 patients admitted with Acute ST-elevation Myocardial Infarction confirmed on the presence of the (a) Typical chest pain of acute ST-elevation Myocardial Infarction (b) Electrocardiogram (ECG) evidence of ST segment elevation in two or more contiguous leads (c) Raised cardiac marker (Troponin I) were included in the study. Patients were randomly enrolled according to the inclusion and exclusion criteria and observe for one week. Data were processed and analyzed by using computer bases software SPSS version 19.0. Descriptive statistical methods were applied for data analysis. P value was considered as statistically significant when it is less than 0.05. Short-term treatment outcome of acute ST-elevation myocardial infarction include mechanical, arrhythmic, ischemic and inflammatory sequelae, as well as left ventricular mural thrombus. In addition to these broad categories, heart failure, arrhythmia, death are other common complications of AMI. The initiation of the complications usually results in explicit sign and symptoms of the acute MI patients. Learning of the complications in the post infarction period and the clinical syndromes develop with each complication, will allow the health care worker to evaluate and manage the complication appropriately.

Haematohidrosis: A Case Series of Five Patients

Haematohidrosisis manifested by sweating mixed with blood. It is a rare disease and there are scarce literature regarding case report. We are describing five cases of haematohidrosis in different age group here in this case series. In case 1- a 20 year old woman was admitted with history of recurrent haemorrhage from various sites without any trauma or anticoagulant or antipletlet medication. There was no evidence of local trauma. Physical examination was unremarkable. Her blood workup came out insignificant. In case 2- a 10 year old boy was admitted with epistaxis, conjunctival bleeding, haematuria and per rectal bleeding without any history of injury. He had no history of medicine which would cause bleeding. Physical examination and laboratory profile were insignificant. In case 3- a 15 year old boy presented with recurrent haematuria and conjunctival haemorrhage without any trauma. No history of medication that would cause the bleeding. His systemic examination and laboratory profile was unremarkable. In case 4- a 25 year old woman presented with bleeding from ear, nose and eyes without any local trauma. She was not on any medication that would cause bleeding. Her systemic inquiry and laboratory profile was unremarkable. In case 5- a 20 year old woman presented with bleeding from eyes, ears and umbilicus. There was no evidence of self-inflicted injury. She had features of anxiety disorder. Other systemic examination and laboratory profile was unremarkable. All the cases were labelled as haematohidrosis and treated with propranolol with successful outcome. We report this case series to build up awareness and disseminate clinical knowledge.

Comparison of Recurrent Laryngeal Nerve Injury during Thyroidectomy with and Without Routine Identification of the Nerve Peroperatively

Thyroidectomy is one of the commonest operative procedures performed in the neck and injury to recurrent laryngeal nerve (RLN) is not uncommon. It results in hoarseness to serious respiratory distress depending on the extent of the injury. The incidence of RLN injury varies widely and is multifactorial depending on the extent of surgical procedures, experience and expertise of the surgeons, nature of the thyroid diseases and a wide range of anatomical variations. Peroperative routine identification of the nerve during thyroidectomy can be a way to prevent injury. Despite recommendation for identification of the RLN peroperatively in thyroid surgery, a debate still exists whether the nerve to be identified peroperatively or not, to avoid its inadvertent injury. The aim of this study was to compare the incidence of RLN injury between two groups where RLN was identified peroperatively in one group and the nerve was not attempted for identification in the other group in thyroid surgery. A comparative cross-sectional study was carried out in the department of surgery and otolaryngology at Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from June 2018 to November 2019, on patients who underwent elective thyroid surgery. Patients were included in RLN identified group and in RLN not identified group, by individual surgeons' preference to identify or not to identify the RLN peroperatively. Peroperative identification of the nerve was done by direct visualization. All cases were evaluated for vocal cord palsy preoperatively, during extubation and postoperatively. Patient's particulars, other parameters and perioperative data were recorded. A total of 80 cases were included in this study, 40 cases (50.0%) in the peroperative RLN identified group and 40 cases (50.0%) in the RLN not identified group. Unilateral RLN palsy was encountered in 2.5% (2 cases) in the RLN identified group and 6.3% (5 cases) in the nerve not identified group (p value 0.192). Transient unilateral RLN palsy was seen in 7.5% (6 cases) of patients; 2.5% (2 cases) in the RLN identified group and 5.0% (4 cases) in the RLN not identified group. And 1.3% (1 case) of permanent unilateral RLN palsy was encountered in this study, which was in the RLN not identified group; there was no permanent palsy in the RLN identified group. We did not encounter any bilateral RLN palsy. There was no statistically significant difference in the incidence of RLN injury between the peroperatively RLN identified group and no attempt to identify the nerve group despite recommendation for peroperative RLN identification in thyroid surgery to avoid its inadvertent injury. However, from this study, we recommend peroperative RLN identification in thyroid surgery to enhance surgical skill.

Comparison of Serum Zinc in Children of Wilson Disease and Non-Wilsonian Volunteers in Bangladesh

Wilson disease (WD) is an autosomal recessive disorder of copper metabolism with diverse clinical manifestations. Zinc (Zn) has been used for treatment of WD. Recent studies showed low serum zinc level in patients suffering from WD than the normal. This cross-sectional analytical study has been designed to compare the serum zinc level between paediatric patients suffering from WD but yet not started treatment and children who have normal ALT level. This study was carried out at the Department of Pediatric Gastroenterology and Nutrition, BSMMU, Dhaka, Bangladesh from July 2018 to June 2019. Total 51 children were included in this study. Among them 27 were diagnosed case of WD aged between three to eighteen years and 24 children of same ages who were suffering from other than liver disease having normal ALT were included as volunteers. The patients of WD were divided into four groups according to their presentation as acute hepatitis, chronic liver disease (CLD), acute liver failure & neuropsychiatric manifestation. Informed written consent was obtained from all patients and volunteers for participation in this study. Along with other physical findings and laboratory investigations 3 ml of venous blood were collected for estimation of serum zinc level. After estimation of serum zinc level results were analyzed statistically. The difference in serum zinc levels were compared between the groups. Serum zinc level was significantly lower in Wilson disease patients (43.8±19.7μg/dl; range: 13-83) compared to volunteers group (67.8±11.8μg/dl; range: 47-97) p<0.001. Among the diseased group, serum zinc level were significantly lower in 18 CLD (38.4±17.4μg/dl) and in 4 acute liver failure (33.1±3.7μg/dl) compared to 4 acute hepatitis (71.8±4.3μg/dl) (p=0.001) and (p<0.001) respectively. Mean serum zinc level was low in 4 Wilsonian acute liver failure (33.1±3.7μg/dl), which was significant compared to those (23) who presented as Wilson disease non acute liver failure (45.7±20.8μg/dl) (p=0.013). Serum zinc level was significantly lower in Wilson disease children compared to the volunteers. Zinc level was also found significantly low in Wilson disease presented as CLD and acute liver failure in comparison to Wilson disease presented as acute hepatitis.

Prediction of Coronary Artery Disease Severity by Using CHA2DS2-VASC-HSF Score in Patients with ST-Elevation Myocardial Infarction

CHADS₂ and CHA₂DS₂-VASc scores are widely used in clinical practice and include similar risk factors for the development of coronary artery disease (CAD). It is known that the factors comprising the newly defined CHA₂DS₂-VASC-HSF score promote atherosclerosis and associated with severity of CAD. Objective of the study was to find out the association of the CHA₂DS₂-VASC-HSF score with the severity of CAD in patients with ST elevation myocardial infarction (STEMI). One hundred (100) patients with STEMI were enrolled in this study after considering inclusion and exclusion criteria over a one year period from October, 2017 to September, 2018 in the Department of Cardiology, National Institute of Cardiovascular Diseases, Dhaka, Bangladesh. Coronary angiogram was done within index hospitalization and coronary artery disease severity was assessed by SYNTAX score system. Patients were divided into two groups on the basis of SYNTAX score. Patients with SYNTAX score ≥23 assigned as Group I and SYNTAX score <23 assigned as Group II. The CHA₂DS₂-VASC-HSF score was calculated. Cut-off value of high CHA₂DS₂-VASC-HSF score was ≥4.0. In this study mean age of study population was 51.8±9.8, male patients were predominant (79.0%). Among the studied patients, highest percentage had history of smoking followed by hypertension, diabetes mellitus and family history of CAD in Group I patients. It was found that DM and family history of CAD and history of stroke/TIA were significantly higher in Group I than Group II. An increasing trend of SYNTAX score was observed according to the CHA₂DS₂-VASc-HSF score. SYNTAX score was significantly higher in CHA2DS2-VASc-HSF score ≥4 than CHA₂DS₂-VASc-HSF score <4 (26.3±6.3 vs. 12.1±7.7, p<0.001). Patients with CHA₂DS₂-VASC-HSF score ≥4 had severe coronary artery disease than CHA₂DS₂-VASC-HSF score <4 assessed by SYNTAX score with 84.4% sensitivity and 81.9% specificity (AUC:0.83, 95% CI: 0.746-0.915, p<0.001). CHA₂DS₂-VASc-HSF score was positively correlated with the severity of CAD. This score could be considered as a predictor of coronary artery disease severity.

A Modified Approach for Harvesting Non Vascularized Fibular Graft for Pediatric Age Group

The conventional technique of harvesting free non-vascularized fibular grafting is associated with different scale of morbidity and usually a long scar. We follow a technique that causes minimum interference to the surrounding soft tissues to harvest the desired length of fibula. This prospective study was performed at Department of Orthopaedics, Dhaka Medical College Hospital from January 2018 to December 2018. Thirty patients of average age 10.5 years (range 8 to 14 years) were taken up for the study. The fibula was harvested by two separate incisions, 1 cm each at proximal and distal extent of proposed length of graft after elevating the periosteum circumferentially using a periosteum elevator. Compression bandage and above knee plaster immobilization was applied that help to reduce hematoma formation. The mean follow up is 12 months. The patients were evaluated clinically and by radiology. Twenty nine patients showed good results. One patient had delayed wound healing resulting in fair result. This modified approach of harvesting fibula reduces donor site morbidity and is safer and easier than conventional approach.

Serum Electrolyte Status of Patients with Acute Stroke Admitted in a Tertiary Care Hospital

Stroke, usually a focal rather than global neurological deficit resulting from vascular origin with sudden onset, may be with cerebral infarction or intracerebral haemorrhage. It results in brain oedema following vascular injury and electrolyte imbalance. A descriptive cross sectional study was carried out in the Department of Medicine, Mymensingh Medical College Hospital, Mymensingh, Bangladesh during March 2016 to May 2018 to assess the electrolyte levels among 220 purposively selected patients with stroke confirmed by CT scan. Data were collected by the principal investigator himself by using interview schedule and case record form after attaining consent. Blood samples were collected from the patients to carry out biochemical and haematological tests and to assess serum electrolyte levels. Data were cross-checked for completeness, consistency and relevancy, and were analyzed by computer software SPSS 20.0. Age was significantly higher in haemorrhagic stroke (64.88±13.00 years) than ischaemic stroke (60.92±13.96 years). Male (55.91%) were predominant than female (44.09%). One hundred nineteen (54.09%) patients had ischaemic stroke and 101(45.91%) patients had haemorrhagic stroke. The serum concentration of Na+, K+, Cl- and HCO₃- were measured during acute period of stroke. Imbalance in serum Sodium, Chloride, Potassium and Bicarbonate level were observed in 37.27%, 29.55%, 23.18% and 6.36% patients respectively. Hyponatremia, hypokalemia, hypochloremia and acidosis were most common electrolyte imbalance in both ischaemic and haemorrhagic strokes. In ischaemic stroke hyponatremia was 35.29%, hypernatremia was 3.36%, hypokalemia 19.33%, hyperkalemia 0.84%, hypochloraemia 30.25%, hyperchloraemia 3.36%, acidosis was in 6.72% and alkalosdis in 1.68% patients while in haemorrhagic stroke hyponatremia 33.66%, hypernatremia 1.98%, hypokalaemia 22.77% hyperkalemia 3.96%, hypochloremia 19.80%, hyperchloraemia 4.95%, acidosis 2.97% and alkalosis was in 0.99% of patients. Mortality was more in hyponatremic, hypokalemic and in hypochloremic patients.

Role of Intra-arterial Nitroglycerin (Post Procedural, Prehemostasis) to Reduce Radial Artery Occlusion after Transradial Catheterisation: A Doppler-guided Study

The study was intended to evaluate efficacy of Intra-arterial nitroglycerin through the sheath at the end of a transradial procedure to preserve the patency of the radial artery. This prospective observational study was done in the Department of Cardiology, National Institute of Cardiovascular Diseases (NICVD), Dhaka, Bangladesh from May 2017 to April 2018, by including a total 200 patients undergoing coronary procedures (CAG and / or PCI) through TRA. RAO was defined as an absence of antegrade flow or monophasic flow or invert flow on Doppler study. In this study 102 patients (Group I) received 200 mcg intra-arterial nitroglycerine, prior to trans-radial sheath removal. Another 98 patients (Group II) did not receive intra-arterial nitroglycerine prior to trans-radial sheath removal. Conventional haemostatic compression methods were applied (average 2 hours) in both groups of patients. Evaluation of radial arterial arterial blood flow by colour Doppler study was done on next day after the procedure in both groups. Results of this study in which RAO was determined by vascular doppler study showed that frequency of radial artery occlusion were 13.5% one day after transradial coronary procedures. We found the incidence was 8.8% vs. 18.4%, (p=0.04) in Group I and Group II respectively. The incidence of RAO was significantly lower in post procedural nitroglycerine group. From multivariate logistic regression analysis diabetes mellitus (p = 0.02), hemostatic compression time for more than 02 hours after sheath removal (p = <0.001) and procedure time (p = 0.02) was predictors of RAO. So, the administration of nitroglycerin at the end of a transradial catheterization reduced the incidence of RAO, as shown by 1 day after the radial procedure by doppler ultrasound.

A Case Report of Porphyria Cutanea Tarda with Hepatitis-C Virus Co-infection

Porphyria cutanea tarda is a rare disorder of heme metabolism due to deficiency of the enzyme uroporphyrinogen decarboxylase which is manifested as some typical dermatological features and hepatic dysfunction. The Hepatitis-C virus co-infection is common and it can be aggravated by other environmental factors. We report a case of porphyria cutanea tarda in a 37-year-old woman, who presented with recurrent skin blisters and has concomitant Hepatitis-C virus infection. She was taking oestrogen containing oral contraceptive pill for a long duration. The diagnosis of porphyria cutanea tarda was considered on the basis of clinical features and high level of urine porphyrin level. She was put on hydroxychloroquine and combination drugs for Hepatitis-C virus with significant improvement after 3 months of therapy.

Local and Nonlocal Transport Spectroscopy in Planar Josephson Junctions

We report simultaneously acquired local and nonlocal transport spectroscopy in a phase-biased planar Josephson junction based on an epitaxial InAs-Al hybrid two-dimensional heterostructure. Quantum point contacts at the junction ends allow measurement of the 2×2 matrix of local and nonlocal tunneling conductances as a function of magnetic field along the junction, phase difference across the junction, and carrier density. A closing and reopening of a gap was observed in both the local and nonlocal tunneling spectra as a function of magnetic field. For particular tunings of junction density, gap reopenings were accompanied by zero-bias conductance peaks (ZBCPs) in local conductances. End-to-end correlation of gap reopening was strong, while correlation of local ZBCPs was weak. A model of the device, with disorder treated phenomenologically, shows comparable conductance matrix behavior associated with a topological phase transition. Phase dependence helps distinguish possible origins of the ZBCPs.

A 60-year-old Man Presented with Relapsing Polychondritis with Haemophagocytic Lymphohistiocytosis

Relapsing polychondritis is a rare autoimmune disorder of unknown etiology, which can affect multiple organs. It usually presents with involvement of elastic cartilage of ear and nose and involvement of other organs like kidney and central nervous system. Here, we report a case of 60-year-old man, who initially presented with fever, polyarthritis, erythema nodosum and painful swelling and redness of both external ears admitted in Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh on 13th December 2019. Two days after hospitalization, he developed sudden onset of proptosis with ophthalmoplegia. After evaluation, he was diagnosed as relapsing polychondritis with haemophagocytic lymphohistiocytosis and was treated with high dose prednisolone. His clinical condition and laboratory parameters significantly improved after treating with prednisolone during follow up.

Procalcitonin versus C-Reactive Protein as a Biomarker for Prediction of Bacterial Infection in Children with Febrile Neutropenia in Acute Leukemia

Febrile neutropenia (FN) is a frequently occurring treatment-related complication with significant morbidity and mortality for childhood acute leukemia. Early diagnosis and assessment of severity are essential steps for early comprehensive treatment to reduce FN-related morbidity and mortality. Biomarkers like C-reactive protein (CRP) and procalcitonin (PCT) can be used to assess and predict the bacterial infection in children with febrile neutropenia. The objective of the study was to determine the role of procalcitonin and CRP as a biomarker for prediction of bacterial infection in children with FN in acute leukemia. This prospective observational study was conducted in the Department of Pediatric Hematology and Oncology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Bangladesh from August 2020 to July 2021. Total 58 Children with acute leukemia aged 1 to <18 years with FN were analyzed in this study. A proper history and thorough physical examination were carried out. The blood sample was sent for biomarkers (Procalcitonin and CRP) within 24 hours of the onset of FN and other investigations, such as Complete blood count, Blood C/S, Urine R/E and C/S. Metabolic workup (SGPT, Serum Creatinine, Serum Electrolytes, Serum Ca+) was also done in every patient. Stool R/E & C/S, Chest X-ray, Wound swab for C/S were done when the patient presented with diarrhoea, cough, respiratory distress and focal sepsis respectively. In this study, the mean age of the patients was 6.62±4.07 years (1.10-16.0 years) and 34 patients (58.6%) were male. In 65.5% of patients, localizing signs of infection were not identified. Of the 58 patients, 12 patients (20.7%) showed positive blood culture and 2 patients (3.4%) showed positive urine culture. Klebsiella spp (41.0%) was the most frequent organism isolated followed by Acinetobacter (17.0%), Pseudomonas (17.0%) and E. coli (17.0%). The median PCT levels were significantly higher in patients with bacterial infection than patients without bacteremia (26.10μg/l versus 0.78μg/l, p=0.002) and PCT level >2μg/l was significantly associated with bacteremia. The median CRP levels in the bacteremia and without-bacteremia patients were 137.4mg/L and 54.17mg/L, respectively (p=0.036). In direct comparisons, PCT showed better overall performance than CRP with the AUC being 0.797 (95% CI 0.651-0.943) for PCT and 0.697 (95% CI 0.54-0.855) for CRP in predicting the bacterial infection. PCT and CRP both are useful biomarkers for the prediction of bacteremia, but PCT may be a superior early biomarker as compared to CRP to predict bacterial infection in children with febrile neutropenia in acute leukemia.

Paroxysmal Nocturnal Hemoglobinuria in Systemic Lupus Erythematosus: A Rare Manifestation

Paroxysmal nocturnal haemoglobinuria (PNH) is a rare disorder of hematopoietic stem cells. The occurrence of PNH in a patient with systemic lupus erythematosus (SLE) is even rarer. One such presentation was seen in a 19 years old woman who presented with fever, multiple joint pain, photosensitivity, oral ulcer, hair loss and was diagnosed as a case of SLE and was admitted in Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh on 7th February 2019. Subsequently she developed progressive anaemia and passing of dark colored urine. Flow cytometry analysis showed PNH clone within red cells. We report this case so that clinicians are aware about this association between PNH and SLE. Informed written consent was obtained from the patient for the publication of this case report, the copy of which is available with the authors.

Health Related Quality of Life in Patients with Pulmonary Tuberculosis

Tuberculosis (TB) is one of the major public health issues in many developing nations especially in Bangladesh. Though most focus is being directed towards mortality and incidence rate, the changes in morbidity and other health status parameters are not been well considered. The aim of the study was a comprehensive assessment of patients with pulmonary tuberculosis by measuring patient's quality of life which may lead to better outcome in patients' health, infection surveillance and prevention programs. This prospective study was conducted in the department of Respiratory and Internal Medicine, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from September 2015 to March 2017. The quality of life scores of 61 smear positive pulmonary tuberculosis cases were measured by validated Bangla version of SF-36 questionnaire before or at the starting of treatment, after the initial phase and at the end of treatment. Then the score was compared with those of 75 healthy matched controls. The changes of the quality of life with the stage of treatment and with socio-demographic variables were assessed. Before treatment, all domains of HRQoL of the pulmonary TB patients were significantly lower than those of the control group (p<0.001). At the end of six-month treatment period, HRQoL of the pulmonary TB patient had significantly increased compared to before treatment (p<0.001). There was no significant difference of scores after six months of treatment with that of control (p>0.05). The lowest score in tuberculosis patients was related to general health perception and vitality. Patients with low socio economic status, low educational level, prolonged disease duration and increased number of symptoms had lower HRQoL scores.

Are there any effects of eco-climatic factors on freshwater prawn reproduction: a study on monsoon river prawn, Macrobrachium malcolmsonii

Prawns are regarded as delicious food items and a source of income as it is the salient exportable fishery item of Bangladesh and a number of other countries. Climate change may inhibit the general physiological activity of prawns. This study explored the eco-climatic effects on reproduction, including size at first sexual maturity (L_m), spawning season, and fecundity of monsoon river prawn, Macrobrachium malcolmsonii (Milne-Edwards, 1844). The study was carried out in the Ganges (Padma) River basin, northwestern Bangladesh, from January to December 2014. Seven hundred fifty-seven specimens ranging from 0.80 to 18.27 g BW (body weight) with TLs (total length) of 4.20 to 11.52 cm were analyzed. The L_m was estimated as 6.2-6.6 cm. Total fecundity was higher than earlier studies and ranged from 2743 to 122,165 with a mean value of 6715 ± 2437. The spawning season was estimated from April to October with a peak in July. Significant correlation was found between rainfall and the presence of ovigerous females, i.e., spawning season. The number of ovigerous females increased in ≥ 100 mm average rainfall, and the maximum ovigerous female spawned at 250-320 mm rainfall. Spawning season of M. malcolmsonii may have shifted with shifting rainy season as a result of climate change. The findings of our investigation would be useful for sustainable management of the fishery of M. malcolmsonii and other prawn species in the Ganges River, Bangladesh, and adjoining countries with similar eco-climatic factors.

Rehabilitation of Persons with Spinal Cord Injury in Bangladesh

There is a knowledge gap about the rehabilitation system for the persons with spinal cord injury (SCI). A rehabilitation scenario is necessary to conduct a national community survey in conjunction with the International Spinal Cord Injury Community Survey (InSCI) in order to gather data on the lived experiences of people with SCI, to map out the health and rehabilitation system of Bangladesh, it's demographic characteristics, accessible resources and rehabilitation challenges. Information for this narrative report was acquired through a structured questionnaire, which was supplemented by an online search of agencies, government websites, rehabilitation-related organizations and published papers during the period of March 2020 to April 2021. Bangladesh is a developing country with a vast population and a developing health care system. Representative government and non-government rehabilitative care settings a total of sixteen survey replies (n=16) were obtained. During the year 2019, a total of 1035 people with SCI were seen. The majority of patients with SCI were hospitalized by a non-government facility (38.65%), whereas the two main public general hospitals consulted roughly 30.0% of people with SCI. The rehabilitation team leader in the majority of the facilities (93.75%) was a physiatrist, but just a few had a full complement of rehabilitation professionals and only 12.5% of settings provide community care. Indoor rehabilitation facilities, equipment and a competent rehabilitation staff are not available at many of the tertiary care facilities including National Trauma Institute (NITOR), where most of the SCI report first after the trauma. A consistent and nationwide data source is unavailable and the majority of the available SCI research publications are hospital-based demographic studies in Bangladesh. SCI was commonly due to work-related trauma in young male manual laborers due to fall from height or road traffic accidents. The country faces multiple challenges in rehabilitation of people with SCI regarding triage, a referral system development, infrastructure and shortage of expert human resources in addition, currently there is no three-tier rehabilitation care continuum available. Keeping pace with the transition to a developed country by 2041, the Bangladesh health sector also has to be oriented to face the focused challenge of caring for people with SCI. As recommended by WHO Rehabilitation 2030 initiatives, establishment of an SCI dedicated national institute and escalation of number of related specialists such as trauma and orthopedic surgery, spinal neurosurgery and physical rehabilitation medicine, skilled professionals such as rehabilitation nurses, therapists, case managers and social workers to work in a team required for specialized care of SCI.

Quality of Life Assessment by SF-36 among the Patients with Rheumatoid Arthritis

Rheumatoid arthritis (RA) patients have substantial functional disability which poses a significant impact on the quality of life (QoL). So, this study aims to assess the QoL of RA patients by the Short Form Health Survey-36 (SF-36) questionnaire. Total sixty-two (62) rheumatoid arthritis patients were included in this cross-sectional observational study and were performed in the Department of Physical Medicine and Rehabilitation, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from August 2018 to September 2019 according to selection criteria. A Bengali validated version of Medical Outcomes Study-36: Item Short Form Health Survey (SF-36) questionnaire was used to assess QoL. Among the sixty-two (62) patients, mean age was 44.18±12.14 years with female preponderance (77.4%). About one-fifth of the patients (19.4%, n=12) were illiterate and the majority (71.0%, n=44) were housewives. Amongst all, 53.2% (n=33) had monthly family income >20,000 taka. Forty percent (n=25) had a disease duration of 1 to 5 years. According to Disease Activity Score Sheet 28 (DAS-28), 36(58.1%) patients had moderate disease activity and 26(41.9%) patients had high disease activity. Among the 8 domains, the mental health domain had the highest score (42.77±13.78) and the role physical domain had the lowest (35.89±15.43). Male, literate patients with higher income had relatively better QoL. Patients with prolonged disease, high disease activity and irregular taking of Disease Modifying Anti-Rheumatic Drugs (DMARDs) had poor quality of life. A significant negative correlation was present between SF-36 scores and the DAS-28 scores (r = -0.803, p<0.001). Rheumatoid arthritis had a relatively poor quality of life regarding both physical and mental health components, but the physical health component was predominantly affected.

Association of Diastolic Dysfunction with Angiographic Severity of Coronary Artery Disease in patients with Non-ST Elevation Myocardial Infarction

In recent years, diastolic dysfunction is an evolving context. Presence of left ventricular diastolic dysfunction (LVDD) indicates a poor prognosis in patients with an ACS and chronic coronary artery diseases. This study evaluated the association of LVDD and angiographic severity of CAD in patients with non-ST elevation myocardial infarction (NSTEMI). This cross-sectional analytical study was carried out in National Institute of Cardiovascular Diseases, Dhaka, Bangladesh, during the period of April 2017 to March 2018. A total of 120 NSTEMI patients undergoing coronary angiogram (CAG) during index hospitalization were included in the study. All patients underwent transthoracic echocardiography before they underwent CAG on different days. Presence (Group I, n=65) and absence of LVDD (Group II, n=55) was established by echocardiography. Severity of CAD was assessed by Vessel score and Leaman score. Association of traditional risk factors (smoking habit, hypertension, diabetes mellitus, dyslipidemia and family history of CAD) with severity of CAD was investigated. Vessel score showed coronary artery obstruction (CAO) was present in 62(95.4%) patients in Group I and 35(63.6%) patients in Group II, single vessel was involved in 17(27.4%) patients while multi vessel in 45(72.6%) patients was found in Group I. On the contrary 27(77.1%) single vessel patients and 8(22.9%) multi vessel patients were found in Group II. Positive Leaman score was significantly higher in Group I, 62(95.4%) than that of Group II, 35(63.6%) which is statistically significant (p<0.001). This study showed a positive correlation between LVDD and CAD severity in terms of vessel score and Leamanscore. This study also demonstrates that the severity of vessel score and Leaman score was higher in the higher grade of diastolic dysfunction. The present study concludes that LVDD is associated with angiographically severe CAD in patients with NSTEMI.

Reproductive performance of Asian stinging catfish Heteropneustes fossilis (Bloch 1794) in the Ganges River (NW Bangladesh) in relation to environmental factors

Reproduction plays an important role in fish population efficiency and its resiliency to fishing and environment changes. The present study described the comprehensive information on reproductive feature of stinging catfish, Heteropneustes fossilis (Bloch 1794), including size at sexual maturity, spawning season, and fecundity using 622 female individuals sampling by the use of gill net, cast net, and square lift net from January to December 2019 in the Ganges River. We calculated the influences of various environmental parameters which include temperature, dissolved oxygen, pH, and rainfall on the reproductive feature of H. fossilis in the Ganges River. For every specimen, total length (TL), standard length (SL), and body weight (BW) were estimated by measuring board and electronic weighing scale. With ventral dissection of fishes, female gonads were cautiously removed and measured to 0.01 g precision. The gonadosomatic index (GSI), modified gonadosomatic index (MGSI), and Dobriyal index (DI) were used to assess the size at sexual maturity (L_m) and spawning season. According to the results of these indices, L_m was obtained 15.5 cm in TL. Also, TL₅₀ was determined through logistic function as 15.5 cm in TL. Moreover, the highest GSI, MGSI, and DI values indicated the spawning season as of March-August, with peak in May-June. Total fecundity (F_T) varied from 2059 to 59,984 with a mean of 25,028 ± 15,048. Temperature and rainfall was statistically correlated with GSI. In addition, long climatic data series analysis denoted that yearly mean atmospheric temperature is rising in 0.028 °C/year and yearly mean rainfall is declining in 2.98 mm/year which may suggest a potential shift of the spawning period of the species in the future if this trend persists. The results of our study might be more useful in imposing particular management and conservation for H. fossilis in the Ganges River and the surroundings.

Effect of telephone-monitored home-based cardiac rehabilitation exercise on functional capacity and quality of life in heart failure patients in a lower-middle-income country

Funding Acknowledgements

Type of funding sources: None.

Introduction

Chronic heart failure (CHF) prevails as one of the major cardiovascular diseases in lower-middle-income countries (LMICs) like Bangladesh. Home-Based Cardiac Rehabilitation (HBCR) is a cost-effective method of secondary prevention of chronic heart failure which, if provided, might not only improve the health status of the patients but might also reduce the financial and hospitalization burden on the health care system of these countries. The study aims to assess the scope and benefits of HBCR in such low resource settings.

Purpose

The study evaluates the effect of telephone-monitored HBCR exercise programme in improving the functional capacity and quality of life (QoL) in patients of CHF with reduced ejection fraction due to ischemic heart disease (IHD).

Method

This self-controlled interventional study was conducted from August 2019 to July 2020 at a heart failure clinic, a tertiary healthcare centre in Bangladesh. A total of 115 patients of CHF with ejection fraction &lt;40% and in NYHA class II and III were included in the study according to selection criteria. The functional capacity of the patients was evaluated by NYHA classification and 6-minute walk test. The quality of life of the patients was evaluated by Minnesota Living with Heart Failure Questionnaire (MLHFQ). All patients were advised to perform HBCR exercise as per recommended guideline and were telephone-monitored 2-weekly. After the 3-months study period, the participants were divided into compliant and partial compliant groups based on their adherence to the guideline. Repeat evaluation of patients' condition was carried out. Results were then compared within the groups and data was analyzed through appropriate statistical methods.

Results

Significant improvement of NYHA class (p&lt;0.05), and 6-minute walk test distance (6MWTD) (1102.01±215.90 feet vs 1243.30±217.86 feet; p&lt;0.001) were noticed after the rehabilitation programme. Improvement of total MLHFQ score was also observed (35.53±14 vs 28.22±12.84; p&lt;0.001) at 3-months follow up. The functional capacity and quality of life of the patients in both the compliant and partially compliant groups showed significant improvement after the rehabilitation programme (p&lt;0.001); though no difference was found in the indicators when compared between compliant vs partially compliant groups after rehabilitation except for 6MWTD (1302.86±219.61 feet vs 1230.71±212.284 feet, p&lt;0.001).

Conclusion

From the results, it can be concluded that any amount of routine exercise tends to improve quality of life and symptoms in patients of chronic heart failure with reduced ejection fraction. However, to achieve the best effect in functional capacity and overall health status, the addition of a structured exercise programme like HBCR can be beneficial for proper rehabilitation in low resource settings. Further validation of the results is recommended through randomized control trials in larger study groups.

Life history traits of Mystus vittatus in the Ganges River, Bangladesh: recommendation for its sustainable management considering climate change

Freshwater catfishes are regarded primarily as a source of food and sport, so they are highly valuable economically. We comprehensively studied life history features of Mystus vittatus, including sex ratio (SR), population structure, growth pattern, condition, form factor (a_3.0), sexual maturity (L_m), spawning season, fecundity, mortality (i.e., total mortality (Z), natural-mortality (M_W), and fishing mortality (F)), optimum catchable length (L_opt), length at first capture (L_c), and environmental factors (temperature and rainfall) with management policies from the Ganges River during July 2017 to June 2018. SR (1:1.48) differed noticeably from the expected 1:1 ratio (p < 0.05). Total length (TL) ranged from 6.80-16.00 cm for males and 6.53-18.80 cm for females. The growth was negative allometric for both sexes. Fulton's condition factor was the best one and mean relative weight showed no significant difference from 100 for both sexes that indicates balanced population. L_m was 9.60, 9.70, and 8.80 cm based on the gonadosomatic index (GSI), logistic, and maximum length (L_max), respectively. Spawning season was April to September and the peak was May to July. Fecundity varied from 5942 to 49,852 (mean ± SD, 11,898 ± 5028) and a positively correlated with TL and BW. Z was 1.80 year^-1, M_w was 0.97 year^-1, and F was 0.83 year^-1. L_opt was 11.14 cm (TL) and L_c was ~ 8.47 cm (TL). Temperature and rainfall both were significantly related with GSI and suitable range of temperature and rainfall for spawning of M. vittatus was 28-34 °C and 200-390 mm, respectively. Long data series pointed that average air temperature was increasing and rainfall was decreasing. By considering all of the above parameters, we can take the proper management actions for M. vittatus and other freshwater catfishes on the Indian sub-continent, to ensure long-term self-sustainability and sustainable harvest for the benefit of fishers and communities.

Physician's Perception about the Use of PPE, COVID-19 Prevention and Management in Bangladesh

This study aims to explore physician's perceptions about the use of Personal Protective Equipment (PPE), COVID prevention, and management during the COVID pandemic since knowledge on these might explain the reason behind infection and death of physicians in Bangladesh at an unexpected rate. This cross-sectional study was conducted based on an online questionnaire on 346 physicians (n=346) by the Department of Gastroenterology of Mymensingh Medical College Hospital, Bangladesh from 15th July 2020 to 14th September 2020. Physicians of different health care facilities across Bangladesh were invited to take part. Knowledge on specific points of the questionnaire was evaluated, scored, and compared between different groups by Independent sample t-test. Mean knowledge score between the respondents working up to 8 hours and beyond 8 hours per day was 17.28±1.28, 16.90±1.40 respectively (p=0.03). Mean knowledge score observed between graduate and post-graduate physicians and work experience of 5 years and beyond 5 years were 17.26±1.36 vs. 17.16±1.27; (p=0.40), 16.87±1.75 vs. 17.27±1.21; (p=0.11) respectively. Physician's safety should be first concern that is highlighted through proper use of PPE and prevention of COVID. Patient management skills would be better if physicians are trained well on infection prevention and control which in turn will reduce infection and death of physicians.

Adverse In-Hospital Outcome of Transradial PCI in Comparison to Transfemoral PCI in NSTEMI Patients during Index Hospitalization: A Single Center Study in Bangladesh

NSTEMI patients, in comparison to STEMI patients, are more at risk of bleeding, access site complication and MACE after PCI during index hospitalization. Because they get, multiple adjuvant anti-thrombotic agents before PCI than do the STEMI patients undergoing primary PCI. Transradial access (TRA) is proven to decrease those adverse in-hospital outcomes compared to transfemoral access (TFA) in STEMI patients. But very few studies were conducted in this regard considering NSTEMI patients. We observed prospectively the adverse in-hospital outcomes of total 180 NSTEMI patients who had undergone PCI through TRA (Group I = 80) and TFA (Group II = 100) during index hospitalization between October 2017 to September 2018 in National Institute of Cardiovascular Disease (NICVD), Dhaka, Bangladesh. Samples were selected purposively. Patients were followed up 2 hours after PCI and thereafter every day until discharge. Demographic and risk factor variables were almost same in both groups. TRA, compared with TFA, yielded less major bleeding (0% versus 3%, p=0.12) which was statistically non-significant. Minor bleeding was significantly less in Group I (2.5% versus 13.0%, p=0.04). Overall bleeding was also significantly less in Group I (2.5% and 10.0%; p=0.002). Access site complication was non-significantly less in Group I (0% versus 1%, p=0.91). TRA caused non-significant reduction in MACE (2.5% versus 5%; p=0.38) but significant reduction of total adverse in-hospital outcome (5% versus 20%, p=0.006%). In this study TRA seems to have less adverse in-hospital outcome than TFA in NSTEMI patients undergoing PCI during index hospitalization.

Predictors of Malignancy in Thyroid Nodules

Thyroid swellings are common clinical problem throughout the world and also in Bangladesh. Most of thyroid swellings are multinodular, but a good percentage is solitary thyroid nodule. There is no robust, feasible method for malignancy differentiation has not been well established. The study evaluated thyroid nodules for risk of malignancy and compared history, clinical, sonographic features and FNAC findings with histopathology. This was a cross sectional study on 160 consecutive subjects of thyroid nodules done in the department of ENT and Head Neck Surgery of Mymensingh Medical College Hospital (MMCH), Mymensingh, Bangladesh during from July 2018 to December 2019. All patients were admitted and diagnosed by detail history, clinical examination, investigations and underwent thyroidectomy. Detailed history, clinical examination, ultrasonographic finding and FNAC variables were documented retrospectively and a mathematical model was established for malignancy prediction. In this study mean age of the patients of thyroid nodules was 37.54±11.49 years and majority of the patients were within 21-40 years of age. Frequency of thyroid nodules is more in female with male female ratio 1:7. Most of the thyroid nodules appeared in this study within 0-2 years (61.9%). In this series of thyroid nodules constituted 88.1% firm, 8.8% hard, 3.1% cystic. Among the patients 89(55.6%) cases have solitary thyroid nodule and 71(44.4%) cases have multinodular goitre Majority of the nodules were warm 57.5% followed by cold 42.5%. FNAC showed nodular goitre 72.5%, Follicular neoplasm 1.3%, Papillary carcinoma of thyroid 7.5%, colloid goitre 9.4%, suspicious papillary carcinoma 3.8% and lymphocytic thyroiditis 1.3%. In this study out of 85 solid nodule, 69(81.18%) were benign and 16(18.82%) was malignant and out of 3 cystic nodule 3(100%) were benign. In this study most of the benign and malignant nodules were predominantly solid. Study showed the malignancy is significantly (p=0.001) more in solid than cystic nodules. Final diagnosis in this study was done on the basis of histopathological reports. Out of 160 patients, histopathologically benign lesion was 120(75%) and malignant was 40(25%). Among malignant cases 36(22.5%) cases were papillary carcinoma, 1 case was medullary carcinoma and 3 cases were follicular carcinoma.

Positivity of COVID -19 Cases among the Patients Attending Flu Corner of Emergency and Casualty Department of Mymensingh Medical College Hospital

Recent COVID-19 pandemic has changed health resource disposal plan and urged relocation of work force to defend the world from devastation of this emerging disease. This cross-sectional observational study aims to categorize and rationalize COVID-19 testing of all patients attending flu corner of One Stop Service (OSS) in the department of Emergency and Casualty (E&C) in Mymensingh Medical College Hospital (MMCH) during 15th April 2021 to 14th May 2021 on 2627 patients as per inclusion and exclusion criteria. Out of 2627 patients 920(35%) were symptomatic cases and 1707(65%) attended for testing without symptom. Out of 920 symptomatic cases 175(19%) were confirmed COVID-19 cases. Among the confirmed cases 38(21.71%) was admitted whereas, from suspected cases 100(13.42%) got admitted, remaining patients from both categories were advised for home isolation. Coverage and justification of COVID-19 testing should be done precisely to ensure proper disease control and COVID care during this pandemic.

Efficacy and Safety of the Awake Prone Positioning in Patients with COVID-19 Related Respiratory Distress: A Scoping Review

Prone positioning (PP) is becoming an important treatment modality for the management of COVID-19 related respiratory distress syndrome. The aim of this scoping review was to evaluate effectiveness and safety of awake PP in non-intubated patients with COVID-19 related acute respiratory distress at different care settings. The study was conducted during December 1, 2019 to August 30, 2020 using health science electronic databases and grey literature. A PRISMA flow diagram was used and finally 06 studies with 187 patients were included for review. Male patients were predominating with the mean age of approximately 55 years. Oxygenation was improved in 79.14% patients. One hundred fifty seven (83.95%) patients with COVID-19-related hypoxemic respiratory distress tolerated the procedure. Intubations required 25.41% of the patients or mechanical ventilation and 6(3.2%) patients expired. Number of patients in the reported studies could tolerate more than 3 hours of PP without a major side effect. Awake proning improved oxygenation of the patients suffering from COVID-19 related respiratory hypoxia in different care settings. Early instituted prone positioning may be an effective alternative method of treating COVID-19 related respiratory distress. Patient compliance and small size cohort studies are the limitations of this review. Multicenter controlled studies are warranted before conclusions are made about safety and the settings.

Factors Associated with Delayed Hospital Arrival of Patients Presenting with Acute Myocardial Infarction: A Cross-Sectional Study in Bangladesh

Delay in seeking medical care of the patients with acute myocardial infarction (AMI) could affect the outcome. Therefore, it is important to recognize and reduce pre-hospital in initiating treatment of these patients. The objective of the study was to evaluate the factors associated with delayed hospital arrival of patients with AMI. This cross-sectional study was carried out among 385 patients with AMI attended in the Department of Cardiology, Dhaka Medical College Hospital (DMCH), Dhaka, Bangladesh. The delay in arrival to the hospital was recorded along with socio-demographic data, conditions of the patients during onset and other relevant data. The mean age of the patients 59.7±9.9 years with a male-female ratio of 2.4:1. About 22% of patients with AMI arrived at the hospital within 6 hours of symptoms onset and only around 13% arrived within 2 hours of onset of symptoms. Comparatively younger (p=0.037), unmarried (p=0.008) and Muslim (p=0.008) patients were more likely to present for hospital care sooner (p=0.037). Patients coming from upper middle class of socioeconomic status (p<0.001) and those with college or post college level of education (p<0.001) were more likely to present earlier for hospital care. Prehospital delay was larger in non-manual worker patients (p<0.001) as well as in patients with onset of chest pain during rest period (p<0.001) and while at home (p<0.001). Pre-hospital delay was shorter in patients with onset of chest pain from 12am to 6am and 6am to 12pm (p<0.001). Lack of awareness of AMI symptoms and benefits of its early treatment, long distance and mode of transport were shown as the most common causes of delayed arrival of patients at hospital (p<0.001). This study has identified the factors associated with AMI in context of Bangladesh. Effective measures including increasing awareness of AMI symptoms should be taken for better outcome of the patients.

Association of Echocardiographic Epicardial Fat Thickness with the Angiographic Severity of Coronary Artery Disease in Patients with Acute Coronary Syndrome

Estimation of visceral adipose tissue is important as it carries high cardiometabolic risk and several methods are available as its surrogate. Epicardial fat thickness (EFT) is a direct measure of visceral fat rather than anthropometric measurements. EFT can be accurately measured by two-dimensional (2D) echocardiography. It tends to be higher in patients with Acute Coronary Syndrome (ACS). The present study was intended to find out the association between echocardiographic EFT and severity of Coronary Artery Disease (CAD) in patients with ACS. This cross-sectional observational study was carried out in the department of cardiology, National Institute of Cardiovascular Diseases, Dhaka, Bangladesh from October 2017 to September 2018. Sampling technique was purposive sampling. Comparison between groups was done by unpaired-t test & dichotomous variables were compared by chi-square test. A total of 164 patients was enrolled in the study, prospectively examined EFT on echocardiography and patients were divided into 2 groups, Group I patients with EFT >4.65mm and Group II patients with EFT ≤4.65mm. Coronary angiograms were analyzed for the extent and severity of CAD using Gensini score. The mean EFT (mm) was found 6.1±1.0 in Group I and 3.5±0.7 in Group II (p<0.001). Patients with a higher EFT were associated with a high Gensini score (Group I vs. Group II, 50.3±24.1 vs. 21.9±20.0; p<0.001). Multivariate analysis showed that EFT (OR 6.07, p<0.001) and smoking (OR 2.66, p=0.03) were independent factors affecting significant coronary artery stenosis. By ROC curve analysis, EFT >4.65mm predicated the presence of significant coronary stenosis by 76.1% sensitivity and 69.9% specificity. EFT measured using Transthoracic echocardiography (TTE) significantly correlates with the severity of CAD. It is sensitive, easily available, and cost-effective and assists in the risk stratification and may be an additional marker on classical risk factors for CAD.

Role of Rotaviral Antigen Detection by ICT in Acute Diarrhoeic Children below 5 Years in a Tertiary Care Hospital of Bangladesh

Rotavirus is responsible for acute severe watery diarrhoea in young children. Early and rapid detection of Rotavirus infection can help to reduce inappropriate administration of antibiotics and has future positive impact on prevention of drug resistance. This cross-sectional study was designed to determine the role of Rotaviral antigen detection by ICT from stool sample of acute diarrhoeal children below five years admitted in Sylhet MAG Osmani Medical College Hospital, Sylhet and was carried out in the Department of Microbiology in collaboration with the Department of Paediatrics during the period from 1st January 2018 to 31st December 2018. Total 184 children of under five years of age with acute watery diarrhoea were enrolled in this study. Rotaviral antigen was detected by ELISA (Enzyme Linked Immunosorbent Assay) and ICT (Immunochromatographic test) from stool samples. Out of 184 stool samples, Rotaviral antigen was found positive in 84 and 86 cases by ICT and ELISA methods, respectively. ICT showed sensitivity of 90.70% and specificity of 93.88% when compared with ELISA. The Rotavirus infection was found highest in male children (61.90%) and in age group of 7 to 12 months (51.89%). Considering the importance of Rotaviral diarrhoea, rapid detection of Rotavirus infection by ICT is essentially needed and might be practiced routinely as it is relatively reliable, easy to perform and cost-effective. It is particularly important in Bangladesh, where diarrhoea is still contributing a significant proportion of morbidity and mortality in under five children.

Short Term Outcome of Therapeutic ERCP in the Management of Biliary Ascariasis in a Tertiary Care Hospital of Bangladesh

The history of ascariasis is very old. It is endemic in various parts of Bangladesh. Hepatobiliary ascariasis is a well-known complication of the intestinal ascariasis. Although cosmopolitan, it predominantly affects people in Asia, Africa, and South America. This was a prospective observational study conducted from July to December 2014 to explore the short term outcome of therapeutic ERCP in the treatment of biliary ascariasis in a tertiary care hospital of Bangladesh. A total of 60 cases of biliary ascariasis were selected conveniently in this study. Data were collected by face-to-face interviews and observation with the help of data sheet. Data were checked for quality control and analyzed by computer using SPSS software. The mean±SD age of the patients was 30.96±7.66 years. All the patients were aged between 17 and 55 years and predominantly affect women in the 3rd and 4th decades. The most common presentation was upper abdominal pain in 47(83.32%) of the patients. Ultrasound was the diagnostic tool of choice, where biliary ascariasis was found in 40(66.7%) of patients. ERCP is reserved mainly for therapeutic purposes and found successful in 57(95%) of the patients.

Frequency of Osteoporosis among Chronic Obstructive Pulmonary Disease Patients Attending Respiratory Medicine Out Patient Department, BSMMU

Osteoporosis is an important systemic manifestation of Chronic Obstructive Pulmonary Disease (COPD). Osteoporosis is a systemic disease of bone which may present as low bone mass and micro-architectural disarray that increases the risk of fracture. The World Health Organization defines osteoporosis as bone density ≥2.5 standard deviations below the bone density of a normal young adult. Osteopenia, a less severe form of bone loss, is defined as a bone density between 1 and 2.5 standard deviations below that reference point. The aetiology of osteoporosis in COPD patients remain unclear, but several factors significantly correspond to reduced bone density in COPD, including older age, female sex and body mass index (BMI). However, the relationship to other factors, such as FEV₁, tobacco smoking, physical inactivity and corticosteroid therapy, are still an unresolved issue. This cross-sectional study was done in the Department of Respiratory Medicine, BSMMU from March 2018 to March 2019. A total of 86 patients of which prevalence of osteoporosis is 29.1%, osteopenia 50% and normal BMD in 20.9%, majority of them was belonging to age group 51-60 years. Male were predominant with male-female ratio of 3.5:1. The frequency of osteoporosis was 32.0%, 64.0% and 4.0% in moderate, severe and in very severe COPD patients, respectively. The frequency of osteopenia was 14.0% in mild, 53.5% in moderate, 20.9% in severe and 11.6% were in very severe COPD patients. The p value (p=0.018) was significant for prevalence osteoporosis and osteopenia with increase in severity of COPD. The prevalence of osteoporosis and osteopenia was high in COPD patients under study. The frequency of osteoporosis and osteopenia was more with severity of COPD.

P14.09 BORTEM-17: A Phase IB/II Single-Arm, Control Non-Randomized, Multicentre, Open Label Clinical Trial for Recurrent Glioblastoma with unmethylated MGMT promoter (NCT03643549)

BACKGROUND

Glioblastoma (GBM) is the most malignant primary brain tumor in adults where median survival in unselected patients is approximately 10 months. There is no standard treatment for patients who progress on temozolomide and patients are best treated within investigational clinical protocols. Patients harbouring tumours with functional O⁶ methylguanine DNA methyltransferase (MGMT) DNA repair enzyme have particularly poor prognosis with median overall survival of 12.7 months, compared to 21.7 months for patients with hypermethylated MGMT promoter. The pre-clinical studies have shown that Bortezomib depletes the MGMT enzyme, restoring the tumour ´s susceptibility to Temozolomide, if the chemotherapy is administered in the precise schedule when the MGMT enzyme is depleted. Additionally, Bortezomib shows an antitumour effect by blocking autophagy flux. Based on the promising pre-clinical results, a non-randomized, open label phase IB/II clinical trial was designed. The primary endpoints include assessment of safety of Bortezomib administered with Temozolomide for phase IB and median progression free survival, overall survival as well as progression free rate at 6 months.

MATERIAL AND METHODS

Recurrent glioblastoma patients with unmethylated MGMT promotor, progressing at least 12 weeks after completion of postoperative radiotherapy, with adequate organ function, performance status Karnofsky 70 or better and radiologically measurable lesions are screened for study inclusion. The experimental treatment consists of Bortezomib 1.3mg/m² administered IV on days 1, 4, 7, during each 4-week chemotherapy cycle with per oral Temozolomide at 200mg/m² 5 days/week every 4 weeks starting on day 3. Study group will be compared to historical controls on conventional management. The sample size was calculated to 63 patients, ten of them were included in the phase IB.

RESULTS

The phase IB of the trial was completed in 2019 and the combination of Temozolomide and Bortezomib was shown to be safe and well tolerated. Until April 2021 a total number of 23 patients were included into the trial. The patients are treated at 4 different referral university hospitals in Norway. A clinical treatment benefit with both radiological tumor volume response and stable disease were observed. The patient inclusion in the trial is delayed due COVID-19. The majority of observed side effects are mild or moderate. The grade 3 or 4 adverse effects included thrombocytopenia, ataxia, muscle weakness, delirium and hyperglycemia. Patients that progressed under the treatment received another line of therapy according to the institutional practice.

CONCLUSION

A combination of Bortezomib and Temozolomide administered in a defined time sequence to achieve sensitization of glioblastoma to alkylating agent is safe and feasible and may represent a novel treatment option for patients with this devastating disease.

P14.65 Survival in a consecutive series of 467 glioblastoma patients: impact of prognostic factors and recurrent treatment at two independent institutions

BACKGROUND

Glioblastoma (GBM) is an aggressive primary brain tumor with median overall survival (OS) of less than one year in unselected adult patients. There is no standard therapy at recurrence. We aimed to evaluate OS in a consecutive series of GBM patients from Norway’s two largest regional health authorities, compare the effect of physicians’ choice of antineoplastic treatment upon recurrence and identify prognostic and predictive factors.

MATERIAL AND METHODS

Clinicopathological data from n=467 patients with histologically confirmed GBM diagnosed and treated at Haukeland and Oslo university hospitals from January 2015 to December 2017 was retrospectively collected. Data included tumor location, methylation status of the methylguanine-DNA methyltransferase (MGMT) promoter and mutation of the isocitrate dehydrogenase (IDH) genes, patient age and sex, extent of tumor resection at primary diagnosis, and treatment at first, second and third tumor recurrences. Cox-proportional hazards regression with pairwise analyses adjusted for multiple testing with Scheffé’s post-hoc test were used to adjust effect of multiple risk factors on mortality.

RESULTS

Median OS was 12.1 months and 21.4 % and 6.8 % of patients were alive at 2 and 5 years, respectively. Treatment at recurrence varied between institutions but did not impact OS (p=0.201). Median time to progression was 8.2 months. Age, MGMT promoter methylation, tumor location and extent of tumor resection were all independent prognostic factors for OS. Patients receiving radiotherapy to 60 Gray with concomitant and adjuvant temozolomide at primary diagnosis had best outcome with median OS of 16.1 months and 9.3% were alive at 5 years. At first recurrence patients eligible for gammaknife/stereotactic radiosurgery (GK/SRS) or surgery, alone or combined with chemotherapy, had superior survival compared to chemotherapy alone (p&lt;0.0001 and p=0.014, respectively). On Scheffé’s post-hoc analyses only GK/SRS was superior to chemotherapy (p=0.01). At second and third recurrence none of the antineoplastic strategies came across as superior or inferior to each other using Cox. On Scheffé’s post-hoc analyses chemotherapy alone and combined with bevacizumab were superior at second recurrence (p=0.008 and p=0.042, respectively) and chemotherapy combined with bevacizumab was superior at third recurrence (p=0.043), compared to no antineoplastic treatment. Our retrospective study is limited by small sample sizes and heterogeneous treatment groups, especially at second and third recurrences, as well as patient selection.

CONCLUSION

Recurrence treatment differed between the two institutions but there was no difference in OS. Our findings underline the lack of standard therapy upon GBM recurrence and the urgent need for novel therapeutic strategies.

Effects of COVID-19 pandemic on Baor (Oxbow lake) fisheries: Decreased economic livelihoods and food security

The COVID-19 pandemic has had a negative impact on the global economy, with Bangladesh as a developing country exhibiting greater vulnerability. This pandemic has negatively affected the livelihoods and food security of the nation. Baor (oxbow lake) fisheries communities also were significantly affected during the pandemic, in terms of incomes, food security, health conditions, etc. Fishers have had to stop harvesting, or lower the quantity, of fishes, the sale of which was the main income source of the baor fishers' community because of reduced consumer demands during the lockdown conditions. The supply chains of fishes and fish culture inputs were also disrupted because of a lack of needed transportation, thereby hindering the availability of this convenient protein source from the fish. All these factors negatively impacted the incomes of the people dependent on this important fishery. If appropriate measures are applied to overcome these various difficulties, the baor fisheries may again contribute significantly to the livelihoods and food security of the population in the southwestern part of Bangladesh.

Realization of Structural Colors via Capped Cu-based F-P Cavity Structure

Structural colors with tunable properties have several applications in the beautification of mobile devices, surface decoration, art and color filters. Herein, we propose an asymmetric F-P cavity design to systematically tune structural colors by changing the thickness of the top metal and intermediate insulator. In this study, Cu and Si₃N₄ were chosen as the top metal and intermediate insulator layers, respectively, various reflection colors being realized on the Cu surface. Various capping layers-that is, SiO₂, polymethyl methacrylate (PMMA), and a commercially available clear coat named ProtectaClear-were used to protect the Cu surface from scratching and oxidation. PMMA coatings can protect Cu from corrosive environments without degradation of the color quality. The colors can be tuned by controlling the thickness of either the metal or intermediate insulator layers, and vivid structural colors-including orange, bright orange, red, purple, violet, light blue, green-yellow, and yellow-green-can be printed. The colors obtained can be attributed to thin-film interference.

Stock assessment of Hooghly Croaker Panna heterolepis in the Bay of Bengal (Southern Bangladesh): implications for sustainable management

The study describes growth pattern, growth parameter, mortality, recruitment pattern, exploitation rate (E) and maximum sustainable yield (MSY) to Panna heterolepis from the Bay of Bengal (Bangladesh). About 1223 specimens were collected from commercial fishermen for 12 consecutive months from January to December, 2019. Length–frequency data were analyzed with FAO-ICLARM Stock Assessment Tool. Moreover, our study recorded different water quality and environmental parameters including pH, rainfall, temperature and DO (dissolved oxygen) from the Bay of Bengal. The findings of the study revealed that the allometric co-efficient (b) value indicated negative allometric growth (<3.00) for P. heterolepis population. Whereas, the population dynamic parameters showed growth coefficient (K) 0.13 year⁻¹, life-span (t_max) 3.85 year and growth performance index (Ø′) 2.30. Along with this, P. heterolepis was found to grow rapidly with an asymptotic length (L_∞) of 39.08 cm. We found that the natural mortality (M =0.44 year⁻¹) rate was almost similar with fishing mortality (F = 0.42 year⁻¹). Consequently, the standing stock was not quite sustainable with the existing fishing strategy. Furthermore, the maximum allowable exploitation rate (E_max= 0.471) was lower than the recorded exploitation rate (E = 0.490). Subsequently, overfishing is the most focal threat to the wild stock. The recruitment pattern was almost continuous throughout sampling period. Finally, the MSY was assessed at 10234.47 metric tons. Additionally, the environmental parameters denoted that the ecosystem was in a balanced condition for the wild population. The findings would be very useful to introduce appropriate fishing regulations in the Bay of Bengal and nearby ecosystem.