In vitro and in silico assessment of anti-biofilm and anti-quorum sensing properties of 2,4-Di-tert butylphenol against Acinetobacter baumannii.

Introduction. Acinetobacter baumannii is a nosocomial pathogen with a high potential to cause food-borne infections. It is designated as a critical pathogen by the World Health Organization due to its multi-drug resistance and mortalities reported. Biofilm governs major virulence factors, which promotes drug resistance in A. baumannii. Thus, a compound with minimum selection pressure on the pathogen can be helpful to breach biofilm-related virulence.Hypothesis/Gap Statement. To identify anti-biofilm and anti-virulent metabolites from extracts of wild Mangifera indica (mango) brine pickle bacteria that diminishes pathogenesis and resistance of A. baumannii.Aim. This study reports anti-biofilm and anti-quorum sensing (QS) efficacy of secondary metabolites from bacterial isolates of fermented food origin.Method. Cell-free supernatants (CFS) of 13 bacterial isolates from fermented mango brine pickles were screened for their efficiency in inhibiting biofilm formation and GC-MS was used to identify its metabolites. Anti-biofilm metabolite was tested on early and mature biofilms, pellicle formation, extra polymeric substances (EPS), cellular adherence, motility and resistance of A. baumannii. Gene expression and in silico studies were also carried out to validate the compounds efficacy.Results. CFS of TMP6b identified as Bacillus vallismortis, inhibited biofilm production (83.02 %). Of these, major compound was identified as 2,4-Di-tert-butyl phenol (2,4-DBP). At sub-lethal concentrations, 2,4-DBP disrupted both early and mature biofilm formation. Treatment with 2,4-DBP destructed in situ biofilm formed on glass and plastic. In addition, key virulence traits like pellicle (77.5 %), surfactant (95.3 %), EPS production (3-fold) and cell adherence (65.55 %) reduced significantly. A. baumannii cells treated with 2,4-DBP showed enhanced sensitivity towards antibiotics, oxide radicals and blood cells. Expression of biofilm-concomitant virulence genes like csuA/B, pgaC, pgaA, bap, bfmR, katE and ompA along with QS genes abaI, abaR significantly decreased. The in silico studies further validated the higher binding affinity of 2,4-DBP to the AbaR protein than the cognate ligand molecule.Conclusion. To our knowledge, this is the first report to demonstrate 2,4- DBP has anti-pathogenic potential alone and with antibiotics by in vitro, and in silico studies against A. baumannii. It also indicates its potential use in therapeutics and bio-preservatives.

Assessment of quality of essential medicines in public health care facilities of Nepal: Findings of nationwide study.

Essential medicines are those medicines that satisfy the primary health care needs of the citizens. Poor quality of essential medicines can have serious impact on public health. Thus, this study is aimed to assess the quality of essential medicines available in public health care facilities of Nepal. A cross sectional descriptive study was carried out in 62 health facilities across 21 districts, representing all seven provinces of Nepal and selected proportionately from all three ecological regions i.e. Terai, Hill and Mountain using lottery method. Health facilities in selected districts were chosen using random number generator. Face to face interview was taken with health facility in charge using structured questionnaire. All storage conditions information was recorded through observation checklists. Temperature and humidity were measured using a digital instrument. Similarly, 20 different generic medicines were collected for quality testing. The obtained data were entered in Epidata version 3.1, cleaned in Microsoft Excel 2007 and analyzed in SPSS version 16.0. Among 62 health facilities, only 13% of health facilities were found to follow the medicine storage guidelines, with temperature and humidity levels exceeding recommended limits. Out of 244 batches of 20 different generics of essential medicines, 37 batches were found to be substandard. These substandard medicines were- Ciprofloxacin hydrochloride eye/ear drop, Iron supplement tablets, Metformin Hydrochloric tablet, Metronidazole Tablets, Paracetamol Oral suspension, Paracetamol tablet and Povidone Iodine solution. The study recommends the urgent need for the Government of Nepal to prioritize ensuring the quality of essential medicines in the country.

Assessment of knowledge, attitude, and practice of disposing and storing unused and expired medicines among the communities of Kathmandu, Nepal.

BACKGROUND: Unused medicines can be stored by many people at their places of residence and houses for later use. This study evaluated knowledge, and attitudes regarding unused and expired medicines and explored medicine storage and disposal practices among selected households in the Kathmandu valley, Nepal. METHOD: A cross-sectional study with a two-stage cluster survey design was done using a semi-structured questionnaire from April to October 2021. The sample size (total number of households) after adjusting for design effect and non-response rate was 210 and the study population was the household heads. Simple random sampling was done to select clusters during the first stage and systematic random sampling to select households during the second stage. Descriptive statistics and t-test/one-way ANOVA were used to compare the respondents' average knowledge scores. Practice variables were presented using frequency distribution. RESULTS: Around half the respondents were from the Kathmandu district, nearly 20% were from Bhaktapur and 30% were from Lalitpur. Nearly two-thirds were male and about 25% had a bachelor's degree. Nearly 90% of respondents agreed that storage of excess medicines at home may promote self-medication. Similarly, 97.6% of respondents agreed there is a lack of adequate information on the safe disposal of unused medicines. The majority [125 (59.5%)] of participants always checked the expiry date of medicines. The safe methods of medicine disposal were not known by 137 (65.2%) participants. Throwing in a dustbin was the preferred method of expired medicine disposal. CONCLUSION: The level of knowledge and practice of disposing of unused and expired medicines requires improvement. Educational interventions may help improve awareness further. Creating a chart summarizing disposal procedures of common medicines is important. Similar studies in other regions are required.

Knowledge, Attitude and Practice Regarding Eye Health and Eye Health Services in Nepal.

BACKGROUND: This study was conducted to identify knowledge, attitude and practice of the public in relation to eye health and to assess their knowledge of eye health seeking behaviour. METHODS: A three-stage cluster survey was conducted in 15 selected districts of the five development regions of Nepal from May to December 2017.One hundred clusters and fifty households from each cluster were randomly selected. A semi-structured questionnaire was developed in English and translated into Nepali and back translated by experts. Data were entered in CSPro 5.0.3 software and imported to R 3.4.1 software for analysis. RESULTS: Three fourth of respondents were between the age of 20-59 years (84 %) and one third were female (37.4%). 78% of respondents had basic knowledge about ocular diseases (ranging from 68 to 95%). No single method was found to be more appropriate than the other to provide eye health education to the people living in different geographical locations. Radio was more appropriate to provide health education in Doti and television in Saptari district. Around 2% of the people still depended on drug retailers, 0.6% on self-medication and 0.1% on traditional healers for treatment. CONCLUSIONS: The knowledge, attitude and practice of the respondents varied between various districts and with different demographic characteristics. The overall knowledge, attitude and practice score and respondent's knowledge about common eye diseases requires improvement. Different methods can be used to educate public about eye health and common eye diseases.

Effect of an Educational Intervention on Knowledge and Perception Regarding Rational Medicine Use and Self-medication.

BACKGROUND: Rational use of medicines is important for safe and cost-effective pharmacotherapy. However, nearly half of the medicines available in the market may be used irrationally. The present study assessed the perceptions and knowledge about rational medicine use and responsible self-medication among participants before and after an educational intervention at KIST Medical College, Lalitpur. METHODS: An educational module was conducted among healthcare professionals, media personnel and female community health volunteers. The questionnaire was administered before and immediately after the module. The areas addressed were rational medicine use, ethical prescribing, rational drug use situation in Nepal, pharmaceutical promotion, rational self-medication, safe use of antibiotics, and drug use problems in Nepal. RESULTS: Among healthcare professionals, the rational drug use situation in Nepal and the total score significantly increased post-intervention (p<0.05). Among media personnel the mean scores increased significantly in pharmaceutical promotion and drug use problems in Nepal areas but there was a significant decrease in safe use of antibiotics. The pre-intervention pharmaceutical promotion score was significantly higher among healthcare professionals compared to media personnel while the rational self-medication scores were highest among female community health volunteers, safe use of antibiotics scores were highest among the media personnel. Post-intervention the mean pharmaceutical promotion scores was highest among healthcare professionals, rational self-medication scores among female community health volunteers, safe use of antibiotics, drug use problems in Nepal and total scores were highest among the media personnel. CONCLUSIONS: There were differences in the mean pre-intervention scores among different subgroups. A single session may not be enough to bring about significant changes in knowledge and perception. The retention of knowledge could be measured in future studies.