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1.
J Educ Health Promot ; 13: 113, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38726072

RESUMO

BACKGROUND: Access to safe water, sanitation, and hygiene (WASH) is the most basic need for mankind. Poor WASH practices are associated with various waterborne diseases, especially in developing countries such as India. The aim of the study was to assess WASH practices among residents of different slum settlements in a ward of Kolkata, identify the factors associated with WASH practice, and explore the barriers faced by the families and municipal staff in providing adequate WASH services to the community. MATERIALS AND METHODS: An observational study, cross-sectional in design with a convergent parallel mixed-methods approach, was conducted in different slum settlements in a ward of Kolkata. Quantitative data were collected by face-to-face interview, spot observation, and measuring the living area, door, and window spaces. Key informant interviews were conducted with the medical officer, ward vector-control coordinator, and municipal waste handlers, in addition to in-depth interviews with respondents who had unsatisfactory WASH practices. SPSS version 25.0 was used to analyze the quantitative data. Qualitative data were analyzed thematically using Atlas.ti 22. RESULTS: The overall WASH practices were considered satisfactory in 58.8% of the households. Education of the respondents up to the secondary level, presence of overcrowding, and inadequate ventilation in the house had statistically significantly higher odds of unsatisfactory practice. Poor living conditions, difficulty in collecting and storing water, waterlogging, blocked sewage drains, common toilets for men and women, and lack of motivation were the primary obstacles identified by the residents. CONCLUSION: Unsatisfactory WASH practices were observed among a high proportion of the slum population. Community engagement and education regarding WASH in communities is strongly recommended along with improvement of infrastructure and capacity building.

2.
Indian J Public Health ; 67(2): 203-207, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37459013

RESUMO

Background: Horticulture or working in plant nursery is one of the main occupations in few areas of the southern part of West Bengal. It is considered as a hazardous health sector worldwide as it possesses several physical, chemical, and biological risks. Objectives: The present study aimed to estimate the occupational health hazards and morbidity profile among the nurserymen living in a rural area of West Bengal and to determine the factors associated with occupational health hazards and morbidity of the participants. Materials and Methods: An observational descriptive, cross-sectional study was conducted from September 2021 to November 2021among 132 nurserymen in a subcenter of South 24 Parganas district of West Bengal through interview using a predesigned, pretested, and structured schedule. Data were analyzed using the SPSS version 25.0. Bivariate and multivariate logistic regression was used to determine the factors associated with health hazards and morbidity. Results: Different types of occupational hazards experienced by the participants were physical (100%), biological (91.6%), ergonomical (91%), chemical (85.6%), and psychological (31.8%). Most common occupation-related morbidity reported was skin rash (82.6%) followed by headache (78%), neck pain (78%), and low back pain (59.8%). Multivariate logistic regression revealed that age ≥60 years, daily working hours of ≥7 h and presence of chronic disease were statistically significant covariates of hazards. Female gender and working span of >10 years were significant covariates of "high morbidity" (P < 0.05). Conclusion: One or more types of occupational hazards were experienced by the respondents. Future interventions to address hazards and morbidities of the workers along with the development of preventive measures are the need of the hour.


Assuntos
Saúde Ocupacional , Humanos , Pessoa de Meia-Idade , Estudos Transversais , Índia/epidemiologia , Morbidade , Modelos Logísticos
3.
Water Res ; 241: 120116, 2023 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-37270953

RESUMO

During the 2015-2016 Zika virus (ZIKV) epidemic in the Americas, serological cross-reactivity with other flaviviruses and relatively high costs of nucleic acid testing in the region hindered the capacity for widespread diagnostic testing. In such cases where individual testing is not feasible, wastewater monitoring approaches may offer a means of community-level public health surveillance. To inform such approaches, we characterized the persistence and recovery of ZIKV RNA in experiments where we spiked cultured ZIKV into surface water, wastewater, and a combination of both to examine the potential for detection in open sewers serving communities most affected by the ZIKV outbreak, such as those in Salvador, Bahia, Brazil. We used reverse transcription droplet digital PCR to quantify ZIKV RNA. In our persistence experiments, we found that the persistence of ZIKV RNA decreased with increasing temperature, significantly decreased in surface water versus wastewater, and significantly decreased when the initial concentration of virus was lowered by one order of magnitude. In our recovery experiments, we found higher percent recovery of ZIKV RNA in pellets versus supernatants from the same sample, higher recoveries in pellets using skimmed milk flocculation, lower recoveries of ZIKV RNA in surface water versus wastewater, and lower recoveries from a freeze thaw. We also analyzed samples collected from Salvador, Brazil during the ZIKV outbreak (2015-2016) that consisted of archived samples obtained from open sewers or environmental waters thought to be contaminated by sewage. Although we did not detect any ZIKV RNA in the archived Brazil samples, results from these persistence and recovery experiments serve to inform future wastewater monitoring efforts in open sewers, an understudied and important application of wastewater monitoring.


Assuntos
Infecção por Zika virus , Zika virus , Humanos , Zika virus/genética , Infecção por Zika virus/epidemiologia , Infecção por Zika virus/diagnóstico , Águas Residuárias , Surtos de Doenças , Brasil/epidemiologia , RNA
4.
Indian J Public Health ; 67(1): 35-40, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37039203

RESUMO

Background: Medical education is recognized as stressful globally. COVID-19 pandemic is an additional source of anxiety to the medical students. Objectives: This study was conducted to assess the prevalence and to identify the factors associated with anxiety due to COVID-19 among undergraduate medical students in a teaching hospital of Kolkata, West Bengal. . Methods: An observational cross-sectional study was conducted among 363 undergraduate medical students using the stratified random sampling of a medical college from June to July 2021. Data were collected using a predesigned, pretested, and structured online questionnaire, including "Coronavirus Anxiety Scale." Descriptive statistics were used to estimate the prevalence of anxiety. Pearson's Chi-square test was performed to find out the factors associated with anxiety due to COVID-19. Results: About 25.6% of the medical students were found to have anxiety due to COVID-19. About 28.9% of them reported COVID-19 infection in family in recent past and 11.0% had themselves tested positive. Nearly 20% reported loss of family members, relatives, and close friends due to COVID-19. The factors associated with anxiety due to pandemic were socioeconomic status, social stigma, sleep disturbances, history of COVID-19 in family, loss of job. and vaccination status of family members missing practical classes and exam-related anxiety. Conclusion: The study found that one-fourth of the medical students had anxiety due to COVID-19. Social stigma due to COVID-19 and loss of job of parents were the most significant predictors. It is recommended that targeted psychological and clinical interventions need to be taken to alleviate students' anxiety due to COVID.


Assuntos
COVID-19 , Estudantes de Medicina , Humanos , COVID-19/epidemiologia , Estudantes de Medicina/psicologia , Estudos Transversais , Pandemias , Atenção Terciária à Saúde , Índia/epidemiologia , Ansiedade/epidemiologia
5.
Indian J Public Health ; 66(Supplement): S45-S50, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36412473

RESUMO

Background: Under-notification of tuberculosis (TB) cases remains a persistent problem that impedes accurate estimation of the disease burden. India's private health sector contributes to only one-fourth of the total TB notifications. Objectives: The present study was conducted among registered private practitioners in Kolkata to assess their knowledge, attitude and practice on TB notification, to find the socio-demographic and work-related factors associated with it, to identify the barriers faced by them in notifying TB cases and to elicit suggested solutions in overcoming these barriers. Materials and Methods: It was an observational study, cross-sectional in design following explanatory sequential mixed-methods approach conducted among 426 private practitioners in Kolkata Municipal Corporation area over 2 years (July 2019-October 2021). Quantitative data were analyzed using SPSS 25.0 with suitable descriptive and inferential statistics. Qualitative data were analyzed using Atlas.ti 7.1 and data were represented in the form of themes, codes, and verbatims. Results: Out of 426, 295 (69.2%) of the study population had adequate knowledge, 385 (90.4%) had positive attitude and only 115 (27.0%) had satisfactory practice. Lack of awareness, inadequate communication, and breaching patient confidentiality were the main barriers identified. Suggested solutions to improve engagement of private sector were organizing more continuing medical educations, active case finding, and acknowledgement to private practitioners on notification. Conclusion: Private practitioners had adequate knowledge on TB notification, their attitude was very positive but practice was poor. Training and sensitization of private practitioners on notification are recommended with feedback from both ends.


Assuntos
Prática Privada , Tuberculose , Humanos , Estudos Transversais , Índia/epidemiologia , Tuberculose/epidemiologia , Pessoal de Saúde
6.
Cell Rep ; 39(9): 110885, 2022 05 31.
Artigo em Inglês | MEDLINE | ID: mdl-35649379

RESUMO

Physiological blood-tissue barriers play a critical role in separating the circulation from immune-privileged sites and denying access to blood-borne viruses. The mechanism of virus restriction by these barriers is poorly understood. We utilize induced pluripotent stem cell (iPSC)-derived human brain microvascular endothelial cells (iBMECs) to study virus-blood-brain barrier (BBB) interactions. These iPSC-derived cells faithfully recapitulate a striking difference in in vivo neuroinvasion by two alphavirus isolates and are selectively permissive to neurotropic flaviviruses. A model of cocultured iBMECs and astrocytes exhibits high transendothelial electrical resistance and blocks non-neurotropic flaviviruses from getting across the barrier. We find that iBMECs constitutively express an interferon-induced gene, IFITM1, which preferentially restricts the replication of non-neurotropic flaviviruses. Barrier cells from blood-testis and blood-retinal barriers also constitutively express IFITMs that contribute to the viral resistance. Our application of a renewable human iPSC-based model for studying virus-BBB interactions reveals that intrinsic immunity at the barriers contributes to virus exclusion.


Assuntos
Barreira Hematoencefálica , Células-Tronco Pluripotentes Induzidas , Antivirais , Encéfalo/fisiologia , Células Endoteliais/fisiologia , Humanos , Células-Tronco Pluripotentes Induzidas/fisiologia , Masculino
7.
Lung India ; 36(3): 239-240, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31031347
9.
PLoS Pathog ; 13(2): e1006240, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-28241074

RESUMO

Oxidative stress activates the cellular kinase HRI, which then phosphorylates eIF2α, resulting in stalled translation initiation and the formation of stress granules (SGs). SG assembly redirects cellular translation to stress response mRNAs and inhibits cap-dependent viral RNA translation. Flavivirus infections were previously reported to induce oxidative stress in infected cells but flavivirus-infected cells paradoxically develop resistance to arsenite (Ars)-induced SG formation with time after infection. This resistance was previously postulated to be due to sequestration of the SG protein Caprin1 by Japanese encephalitis virus capsid protein. However, Caprin1 did not co-localize with West Nile virus (WNV) capsid protein in infected cells. Other stressors induced SGs with equal efficiency in mock- and WNV-infected cells indicating the intrinsic ability of cells to assemble SGs was not disabled. Induction of both reactive oxygen species (ROS) and the antioxidant response was detected at early times after WNV-infection. The transcription factors, Nrf2 and ATF4, which activate antioxidant genes, were upregulated and translocated to the nucleus. Knockdown of Nrf2, ATF4 or apoptosis-inducing factor (AIF), a mitochondrial protein involved in regenerating intracellular reduced glutathione (GSH) levels, with siRNA or treatment of cells with buthionine sulphoximine, which induces oxidative stress by inhibiting GSH synthesis, decreased intracellular GSH levels and increased the number of SG-positive, infected cells. Mitochondria were protected from Ars-induced damage by WNV infection until late times in the infection cycle. The results indicate that the increase in virus-induced ROS levels is counterbalanced by a virus-induced antioxidant response that is sufficient to also overcome the increase in ROS induced by Ars treatment and prevent Ars-induced SG assembly and mitochondrial damage. The virus-induced alterations in the cellular redox status appear to provide benefits for the virus during its lifecycle.


Assuntos
Antioxidantes/metabolismo , Glutationa/metabolismo , Estresse Oxidativo/fisiologia , Vírus do Nilo Ocidental/patogenicidade , Animais , Arsenitos/metabolismo , Western Blotting , Linhagem Celular , Grânulos Citoplasmáticos/metabolismo , Humanos , Microscopia de Fluorescência , RNA Interferente Pequeno , Espécies Reativas de Oxigênio/metabolismo , Transfecção , Replicação Viral/fisiologia , Febre do Nilo Ocidental/metabolismo , Vírus do Nilo Ocidental/metabolismo
10.
J Family Med Prim Care ; 6(2): 360-365, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29302548

RESUMO

INTRODUCTION: Menstruation is a milestone event in a girl's life and the beginning of reproductive life. Lack of knowledge and poor sanitary practices during menstruation has been associated with serious ill-health ranging from genital tract infections, urinary tract infections, and bad odor. AIM: This study aims to explore the knowledge, attitude, and practices about menstrual hygiene and perceived reproductive morbidity among adolescent school girls in Puducherry. MATERIALS AND METHODS: A school based cross-sectional study was conducted from June 2015 to July 2015 in Puducherry among 242 adolescent school girls in the age group of 12-18 years using multistage random sampling technique. Data were collected using a predesigned pretested, structured proforma by personal interview method after having informed written consent. RESULTS: The mean age for menarche was 12.99 ± 0.9 years; 51.7% of respondents were not aware of menstruation before attaining menarche; 71.5% and 61.2% were not known about the cause and source of the menstrual bleeding, respectively; 78.1% used only sanitary pads whereas 21.9% used both old clothes and sanitary pads as the absorbents. Unsatisfactory cleaning of the external genitalia was practiced by 12% of respondents. Higher prevalence of dysmenorrhea (82.2%) was mentioned by the respondents; 25.2% reported excessive genital discharge. Statistically significant association was found between perceived reproductive morbidity and poor menstrual hygiene practices. About 88.4% of the study population reported any one of the reproductive morbidity, and only 37.4% sought for medical treatment from a health facility. CONCLUSION: The present study has underscored the necessity of adolescent girls to have adequate and precise knowledge about menstruation before menarche. Proper menstrual hygiene practices which could be imparted through appropriate interventions at earlier stages of life can prevent the girls and women from suffering reproductive morbidities.

11.
J Family Med Prim Care ; 6(3): 627-635, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29417021

RESUMO

BACKGROUND: Delayed diagnosis of tuberculosis (TB) is a significant problem both in individual as well as community level. Different studies around globe revealed that these diagnostic delays are attributed to both patient delay and health system-related delay. AIMS: This study aims to assess the magnitude of delay in diagnosis and the association with sociodemographic profile among new sputum-positive pulmonary TB patients in Darjeeling district. MATERIALS AND METHODS: A cross-sectional study was conducted among 374 TB patients from October 2011 to March 2012 using a predesigned pretested schedule by face-to-face interview. STATISTICAL ANALYSIS: Logistic regression analysis, odds ratios (OR), adjusted ORs. RESULTS: Patient delay, health system delay and total diagnostic delay were 27 days, 20.1 days, and 20.6 days; mean delays were 23.64, 5.71, and 29.46 days, and median delays were 25, 5, and 32 days, respectively. Risk factors associated with patient delay were female gender, rural residence, illiteracy, smoking, alcohol consumption, taking two, or more alternate treatments; for health system delay were female sex, rural residence, time to reach health facility, time spent per visit; and for total diagnostic delay were female sex, alcoholism, and seeking more than two alternate treatment. CONCLUSIONS: The risk factors for delay identified may be the subject of future interventions.

12.
J Family Med Prim Care ; 4(3): 388-94, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26288779

RESUMO

BACKGROUND: The treatment outcome "default" under Revised National Tuberculosis Control Program (RNTCP) is a patient who after treatment initiation has interrupted treatment consecutively for more than 2 months. AIMS: To assess the timing, characteristics and distribution of the reasons for default with relation to some sociodemographic variables among new sputum-positive (NSP) tuberculosis (TB) patients in Darjeeling District, West Bengal. SETTINGS AND DESIGN: A case-control study was conducted in three tuberculosis units (TUs) of Darjeeling from August'2011 to December'2011 among NSP TB patients enrolled for treatment in the TB register from 1(st) Qtr'09 to 2(nd) Qtr'10. Patients defaulted from treatment were considered as "cases" and those completed treatment as "controls" (79 cases and 79 controls). MATERIALS AND METHODS: The enrolled cases and controls were interviewed by the health workers using a predesigned structured pro-forma. STATISTICAL ANALYSIS USED: Logistic regression analysis, odds ratios (OR), adjusted odds ratios (AOR). RESULTS: 75% of the default occurred in the intensive phase (IP); 54.24% retrieval action was done within 1 day during IP and 75% within 1 week during continuation phase (CP); cent percent of the documented retrieval actions were undertaken by the contractual TB program staffs. Most commonly cited reasons for default were alcohol consumption (29.11%), adverse effects of drugs (25.32%), and long distance of DOT center (21.52%). In the logistic regression analysis, the factors independently associated were consumption of alcohol, inadequate knowledge about TB, inadequate patient provider interaction, instances of missed doses, adverse reactions of anti-TB drugs, Government Directly Observed Treatment (DOT) provider and smoking. CONCLUSIONS: Most defaults occurred in the intensive phase; pre-treatment counseling and initial home visit play very important role in this regard. Proper counseling by health care workers in patient provider meeting is needed.

13.
Virus Res ; 206: 108-19, 2015 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-25683510

RESUMO

The positive sense genomes of members of the genus Flavivirus in the family Flaviviridae are ∼ 11 kb in length and have a 5' type I cap but no 3' poly-A. The 3' and 5' terminal regions contain short conserved sequences that are proposed to be repeated remnants of an ancient sequence. However, the functions of most of these conserved sequences have not yet been determined. The terminal regions of the genome also contain multiple conserved RNA structures. Functional data for many of these structures have been obtained. Three sets of complementary 3' and 5' terminal region sequences, some of which are located in conserved RNA structures, interact to form a panhandle structure that is required for initiation of minus strand RNA synthesis with the 5' terminal structure functioning as the promoter. How the switch from the terminal RNA structure base pairing to the long distance RNA-RNA interaction is triggered and regulated is not well understood but evidence suggests involvement of a cell protein binding to three sites on the 3' terminal RNA structures and a cis-acting metastable 3' RNA element in the 3' terminal RNA structure. Cell proteins may also be involved in facilitating exponential replication of nascent genomic RNA within replication vesicles at later times of the infection cycle. Other conserved RNA structures and/or sequences in the 3' and 5' terminal regions have been proposed to regulate genome translation. Additional functions of the 3' and 5' terminal sequences have also been reported.


Assuntos
Regiões 3' não Traduzidas , Regiões 5' não Traduzidas , Flavivirus/fisiologia , Genoma Viral , Interações Hospedeiro-Patógeno , RNA Viral/metabolismo , Replicação Viral , Sequência Conservada , Flavivirus/genética , Modelos Biológicos , Conformação de Ácido Nucleico , Regiões Promotoras Genéticas , RNA Viral/química , RNA Viral/genética , Transcrição Gênica
14.
J Family Med Prim Care ; 3(2): 107-11, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25161965

RESUMO

BACKGROUND: Periodontal diseases, dental caries, malocclusion, and oral cancer are the most prevalent dental diseases affecting people in the Indian community. OBJECTIVE: The study was conducted to assess the awareness and practices on oral hygiene and its association with the sociodemographic factors among patients attending the general Outpatient Department (OPD). MATERIALS AND METHODS: A cross-sectional study was conducted among 224 patients attending the general OPD of the SSKM Hospital, Kolkata, India, from 1 April to 30 April, 2013. The study tool was a pre-designed and pre-tested semi-structured schedule. RESULTS: About 69.20% of the participants used a toothbrush with toothpaste as a method of cleaning their teeth; 35.71% brushed twice in a day; 33.03% brushed both in the morning and at bedtime; and 8.93% used mouthwash. About 40.62% visited the dentist during the last six months; among them 61.18% attended because of pain. Almost three-fourth of the participants knew that tooth decay and bad breath were the effects of not cleaning the teeth. It was known to 71.42, 63.39, 70.53, and 73.21% of the respondents, respectively, that excess sweet, cold drink, alcohol, and smoking/pan chewing were bad for dental health. Television was the source of knowledge to 57.14% of the participants and 35.71% acquired their knowledge from a dentist. Females, literates, urban residents, users of mouthwash, and regular visitors to the dentist had good oral hygiene practices. CONCLUSION: Oral health awareness and practices among the study population are poor and need to improve.

15.
J Virol ; 88(15): 8433-44, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24829338

RESUMO

UNLABELLED: The molecular mechanism of the hepatic tropism of hepatitis C virus (HCV) remains incompletely defined. In vitro hepatic differentiation of pluripotent stem cells produces hepatocyte-like cells (HLCs) permissive for HCV infection, providing an opportunity for studying liver development and host determinants of HCV susceptibility. We previously identified the transition stage of HCV permissiveness and now investigate whether a host protein whose expression is induced during this transition stage is important for HCV infection. We suppressed the expression of a liver-specific protein, cell death-inducing DFFA-like effector b (CIDEB), and performed hepatocyte function and HCV infection assays. We also used a variety of cell-based assays to dissect the specific step of the HCV life cycle that potentially requires CIDEB function. We found CIDEB to be an essential cofactor for HCV entry into hepatocytes. Genetic interference with CIDEB in stem cells followed by hepatic differentiation leads to HLCs that are refractory to HCV infection, and infection time course experiments revealed that CIDEB functions in a late step of HCV entry, possibly to facilitate membrane fusion. The role of CIDEB in mediating HCV entry is distinct from those of the well-established receptors, as it is not required for HCV pseudoparticle entry. Finally, HCV infection effectively downregulates CIDEB protein through a posttranscriptional mechanism. IMPORTANCE: This study identifies a hepatitis C virus (HCV) entry cofactor that is required for HCV infection of hepatocytes and potentially facilitates membrane fusion between viral and host membranes. CIDEB and its interaction with HCV may open up new avenues of investigation of lipid droplets and viral entry.


Assuntos
Proteínas Reguladoras de Apoptose/metabolismo , Hepacivirus/fisiologia , Hepatócitos/virologia , Interações Hospedeiro-Patógeno , Internalização do Vírus , Proteínas Reguladoras de Apoptose/genética , Linhagem Celular , Técnicas de Silenciamento de Genes , Humanos
16.
Artigo em Inglês | MEDLINE | ID: mdl-28607254

RESUMO

BACKGROUND: During September 2012, an increased number of fever cases was reported from Ramnagar-II block, Purba Medinipur district. This study investigated the outbreak, with the following objectives: to describe the distribution of fever cases, to determine the risk factors and to recommend preventive measures. MATERIALS AND METHODS: The clinical features, date of onset and outcome of all cases of fever were listed. Blood specimens were collected from affected patients and sent for serological examination. An epidemic curve was plotted and environmental and entomological surveys were carried out. RESULTS: There was a total of 100 cases, of which 56% (56/100) were men.Among the four villages studied, the highest number of cases was from Gopalpur 37% (37/100), followed by Badalpur 26% (26/100); 19% (19/100) of cases had a history of migration from dengue-endemic areas. The majority of cases were in age group 15-45 years - 52% (52/100), followed by the age group >45 years - 28% (28/100). All the cases had history of fever (100%), followed by myalgia - 82%, headache - 78%, and retro-orbital pain - 73%. The outbreak started on 7 September 2012, peaked on 18 September, then gradually declined and no further cases were noted after 28 September 2012. Seventy-nine percent (79/100) of cases were NS1 test positive (non-structural antigen-1) and 72% (13/18) cases were positive on a dengue monoclonal antibody (IgM) capture enzyme-linked immunosorbent assay (MAC-ELISA) test. All recovered except one (case-fatality ratio: 1%). The values for Household Index, Container lndex and Breteau Index of the four villages were: Badalpur, 3%, 10% and 5%; Gopalpur, 13%, 23% and 18%; Ramchandrapur, 9%, 11%, and 13%; and Tajpur, 2%, 2% and 2%. CONCLUSION: The outbreak was probably due to dengue fever. The study led to a recommendation to destroy water containers and use mosquito nets. The outbreak was controlled.

17.
J Virol ; 87(13): 7622-36, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23637406

RESUMO

The 3'-terminal nucleotides (nt) of West Nile virus (WNV) genomic RNA form a penultimate 16-nt small stem-loop (SSL) and an 80-nt terminal stem-loop (SL). These RNA structures are conserved in divergent flavivirus genomes. A previous in vitro study using truncated WNV 3' RNA structures predicted a putative tertiary interaction between the 5' side of the 3'-terminal SL and the loop of the SSL. Although substitution or deletion of the 3' G (nt 87) within the SSL loop, which forms the only G-C pair in the predicted tertiary interaction, in a WNV infectious clone was lethal, a finding consistent with the involvement in a functionally relevant pseudoknot interaction, extensive mutagenesis of nucleotides in the terminal SL did not identify a cis-acting pairing partner for this SSL 3' G. However, both the sequence and the structural context of two adjacent base pairs flanked by symmetrical internal loops in the 3'-terminal SL were shown to be required for efficient viral RNA replication. Nuclear magnetic resonance analysis confirmed the predicted SSL and SL structures but not the tertiary interaction. The SSL was previously reported to contain one of three eEF1A binding sites, and G87 in the SSL loop was shown to be involved in eEF1A binding. The nucleotides at the bottom part of the 3'-terminal SL switch between 3' RNA-RNA and 3'-5' RNA-RNA interactions. The data suggest that interaction of the 3' SL RNA with eEF1A at three sites and a unique metastable structural feature may participate in regulating structural changes in the 3'-terminal SL.


Assuntos
Nucleotídeos/genética , RNA Viral/genética , Replicação Viral/genética , Vírus do Nilo Ocidental/genética , Animais , Pareamento de Bases , Linhagem Celular , Cricetinae , Primers do DNA/genética , Ensaio de Desvio de Mobilidade Eletroforética , Imunoprecipitação , Sequências Repetidas Invertidas/genética , Espectroscopia de Ressonância Magnética , Dados de Sequência Molecular , Mutagênese , Transfecção , Replicação Viral/fisiologia , Vírus do Nilo Ocidental/fisiologia
18.
Lung India ; 29(4): 319-24, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23243343

RESUMO

INTRODUCTION: Tuberculosis is a public health problem in India. The patients of Tuberculosis hide their disease from family, relatives, and community due to the presence of stigma. This study was conducted to assess the knowledge, awareness, and perception regarding social variables of tuberculosis among patients and to associate the awareness with their literacy status. MATERIALS AND METHODS: Type of study was observational, descriptive, and epidemiological. Study design was cross-sectional. Study setting was general out-patient department of tertiary care hospitals of West Bengal. Sample size was 464 (Four hundred sixty four) patients. The collected data were tabulated, analyzed, and interpreted by proper statistical methods (by percentage and Z test). RESULTS: 60.34% of study population was male. More than one third was illiterate (37.93%). Majority (91.38%) had heard about tuberculosis (TB). Correct answer on cause (infection) was responded by 16.81% patients. About 72.41% had heard about TB from an informal contact. The correct response on mode of spread of TB was told by 31.47% patients. About 62.07% correctly answered that cough was the commonest symptom. 82.76% knew about curability of the disease. Isolation of patient (08.62%) and avoidance of sharing of food (06.03%) were reported as preventive measures. The literacy status had a significant influence on awareness about TB. CONCLUSION: An attempt could be made in future to improve awareness among illiterates to remove myths and misconceptions, to allay the social stigma attached with it, to decrease TB transmission.

19.
J Nat Sci Biol Med ; 3(1): 38-42, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22690049

RESUMO

BACKGROUND: One-fourths of the biomedical waste (BMW) is regarded as hazardous with the potential for significant health concern for both medical personnel and general community. So, awareness about various aspects of BMW management is required and it was assessed among junior doctors in a tertiary care hospital. OBJECTIVES: To assess the knowledge and awareness about various aspects of BMW management among junior doctors (future physicians) and thus help the authority to develop the strategy for improving the situation in future. MATERIALS AND METHODS: In this descriptive observational study, we interviewed 200 junior doctors of a tertiary care hospital of Kolkata using a pre-designed pre-tested self-administered, semi-structured, anonymous questionnaire. RESULTS: Majority of the participants were in the age group of 22 to 24 years (62%), males (66.5%), hostelites (70.2%), belonged to nuclear family (80.1%), and had per capita monthly family income in the range of Rs 5 000 to 20 000 (61.4%). Almost all respondents (99.1%) heard about BMW, 94.4% heard about the BMW rule 1998, and 67.9% knew about the Bio Hazard symbol. Only 55.9% respondents could remember the ten category of BMW. Segregation at source (the golden rule of BMW) was known by 78.8% of the junior doctors, only 29.5% had the knowledge of various methods of final disposal of BMW. Though 98.8% of the study population was aware that improper management of BMW causes different health problems, only 76.4% knew about various types of color-coded bags for collection of BMW. All the junior doctors were trained in all these essential aspects of BMW in their undergraduate curriculum. CONCLUSION: Still, intensive training program and monitoring at regular time interval is needed for all staff, with special emphasis on junior doctors.

20.
J Pharm Bioallied Sci ; 4(1): 51-5, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22368398

RESUMO

BACKGROUND: Global prevalence of thyroid cancer has been on the rise in recent decades. OBJECTIVES: To study the clinical presentations to reach an agreement for diagnosis and optimal management of incidentally revealed thyroid swellings for early diagnosis. MATERIALS AND METHODS: A prospective study was carried out on 178 cases of incidentally detected thyroid swelling attending a tertiary care teaching institute of Kishanganj Bihar. All the cases were subjected to a thorough clinical examination followed by evidence-based interventions. Fine needle aspiration cytology was done in all the cases preoperatively as out-patients basis and histopathologically confirmed postoperatively. RESULTS: The highest incidence of thyroid swelling (75.84%) was found in the age group of 20-40 years; a female preponderance was noted in the ratio 4:1. The duration of swelling ranged from six months to three years. Difficulty in swallowing and breathing was complained by 23 (12.9%) and 18 (10.1%) of the patients respectively. Typically the swellings were located in the right lobe. Commonly the subjects in our study were in euthyroid state (90%) and were with firm swellings (66.7%). Follicular and anaplastic carcinoma was important postoperative cytological findings. Majority of surgical intervention was hemithyroidectomy (55.06%). CONCLUSION: Incidentally revealed thyroid swelling was quite high in eastern India for which we need a consensus line of intervention.

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