Multi-drug resistant, biofilm-producing high-risk clonal lineage of Klebsiella in companion and household animals

Antimicrobial resistance is a global emergency which needs one health approach to address. The present study was conducted to detect the prevalence of beta-lactamase and biofilm-producing Klebsiella strains in rectal swabs (n = 624) collected from healthy dogs, cats, sheep and goats reared as companion or household animals in India. The dogs and cats were frequently exposed to third- or fourth-generation cephalosporins for therapy. The sheep and goats were occasionally exposed to antibiotics and had environmental exposure. Phenotypical ESBL (n = 93) and ACBL (n = 88)-producing Klebsiella were isolated significantly more (P < 0·05) from companion animals than household animals. Majority of the Klebsiella possessed bla_CTX-M-15 . The sequences bla_CTX-M-15.2 , bla_CTX-M-197 and bla_CTX-M-225 are reported first time from the companion animals. All ACBL-producing isolates possessed bla_AmpC . The present study detected 65·8% of Klebsiella strains as biofilm producers possessing the studied biofilm associated genes. The isolates showed phenotypical resistance against chloramphenicol, tetracycline, doxycycline, co-trimoxazole, ampicillin, cefotaxime/clavulanic acid. The present study showed that companion and household animals (dogs, cats, sheep, goats) may act as a carrier of ESBL/biofilm-producing, multi-drug resistant, high-risk clonal lineage of Klebsiella.

Status of maternal health care services: An assessment study in slums of Kolkata

Background and Aims:

Mothers constitute an important and priority group in any community due to their high pregnancy related morbidities and mortality. The prevention of pregnancy related complications was possible with proper utilisation of maternal health care services. This study was conducted with the aim of assessing the utilisation of maternal health care services among mothers with younger child aged ≤3 years in slums of Kolkata, West Bengal and to find out the factors associated with it.

Methodology:

It was a community-based, observational study with cross-sectional design conducted in slums of Kolkata from June 2017 to May 2018. 30 slums [under Kolkata municipal corporation] were selected by cluster sampling technique using probability proportionate to size method. 10 mothers were selected from each slum and a total of 300 mothers were selected for the study. A pre-designed, pre-tested, structured schedule was used for data collection.

Results:

The mean age of the mothers was 23.83 (±3.64) years with the age ranging from 18 to 35 years. 75.7% mothers were registered in 1^st trimester of pregnancy and 100% mothers received ≥4 antenatal check-ups. But only 78% mothers consumed ≥100 IFA tablets and only 23.3% mothers consumed ≥360 calcium tablets in antenatal period. 80.3% of the mothers had unsatisfactory utilisation of maternal health care services. Unsatisfactory utilisation of maternal care services was significantly associated with the younger age of the mothers, a smaller number of pregnancies and teenage marriage.

Conclusion:

Utilisation maternal health care services was not satisfactory among mothers in slums of Kolkata. Awareness generation and behaviour change communication among mothers is necessary for proper utilisation of the services.

Nutritional status and eating behavior of children: A study among primary school children in a rural area of West Bengal

Background:

Dietary preferences and childhood eating behavior has marked influence on nutritional status of children. The objective of the study was to find out eating behavior of primary school children in a rural area of West Bengal using Child Eating Behavior Questionnaire and to determine association of body mass index (BMI) with eating behavior.

Methodology:

It was an institution-based observational study with cross-sectional design done from May to August, 2018. The study was done among 142 children studying at four primary schools at Singur, in the rural field practice area of our institute. The four schools were selected randomly using list of primary schools in the area. Eating behavior of children was assessed using Child Eating Behavior Questionnaire (CEBQ). BMI of the children was assessed using WHO Z scores tables for children. Data analysis was done using SPSS Version 16 and binary logistic regression was done to find out association of BMI with eating behavior of study participants.

Results:

The proportion of under-nutrition and overnutrition was 22.0% and 16.0%, respectively. Food fussiness was significantly associated with thinness [BMI below (−2SD)]. Enjoyment of food, satiety response was significantly associated with overnutrition [BMI above (+1 SD)]. Food avoidance subscale was significantly associated with thinness [OR: 2.5, CI: 1.11, 5.63] and this subscale was protective for overweight [OR: 0.22, CI: 0.07, 0.69].

Conclusion:

This study showed association of BMI with child eating behavior. Therefore, awareness among parents should be created to change problematic eating of their children which would further help them to achieve normal BMI.

Morbidities of rice mill workers and associated factors in a block of West Bengal: A matter of concern

Context:

Rice mill workers usually belong to unorganized sector and lack in training regarding hazard prevention. Unprotected exposure to suspended particles and fumes can lead to respiratory morbidities among them. Workers, especially loaders, were susceptible to work-related musculoskeletal diseases.

Aim:

To find out the morbidity profile and associated factors among rice mill workers.

Methodology:

A cross-sectional workplace-based study was conducted during July--September 2018 among 143 workers of two rice mills in Indas block, West Bengal. Workers, employed for at least 6 months in the rice mills and who gave informed written consent was interviewed using a predesigned pretested questionnaire and were clinically examined. Nonfasting capillary blood glucose estimation and spirometry were carried out. Workers contraindicated to spirometry were excluded.

Result:

Commonest morbidities were musculoskeletal discomfort (65%), hypertension (20.9%), and chronic respiratory morbidity (16.9%). No personal protective equipment (PPE) was used by these workers. Significant association of musculoskeletal discomfort was found with tobacco abuse (Adjusted Odds Ratio (AOR) =2.90), job of loader (AOR = 3.51), and central obesity (AOR = 3.39). Hypertension was significantly associated with increasing age (AOR = 1.06), and increasing body mass index (AOR = 1.17). Whereas increasing age (AOR = 1.08), working inside mill (AOR = 7.58), working more than 48 hours a week (AOR = 7.37) were significantly associated with chronic respiratory morbidity.

Conclusion:

Optimization of working hours, effective continuous use of PPE, and use of proper ventilation technology are recommended. Proper work placement, preplacement examination, and periodic health screening with spirometry are also needed.

Are thalassemia patients oxidatively challenged?

Background

Repeated blood transfusions is the mainstay of treatment for beta thalassemia major patients. Multiple blood transfusions lead to significant iron overload in these patients. Iron overload causes liberation of oxygen free radicals and peroxidative lipid injury. This study has been designed to study whether thalassemics suffer from oxidative injury. It also aims to study the quantum of oxidative injury.

Methods

It is a cross sectional study using cases and controls. Thirty thalassemic patients receiving multiple blood transfusions were included in this study and thirty healthy age and sex matched controls were recruited for the study. Serum ferritin levels, malondialdehyde, nitric oxide levels were estimated.

Results

Levels of all the three parameters were significantly increased (p < 0.05) in the cases compared to controls. Mean levels of all three parameters were correlated with serum ferritin levels and number of blood transfusions in increasing order. All the parameters showed fair degree of correlation (r ≥ 0.25, p ≤ 0.05).

Conclusion

Thalassemic patients receiving multiple blood transfusion suffer from iron overload which results in increased oxidative stress.

Characterization of beta-lactamase and biofilm producing Enterobacteriaceae isolated from organized and backyard farm ducks

This study was undertaken to detect the occurrence of beta-lactamase and biofilm producing Enterobacteriaceae in healthy ducks. A total 202 cloacal swabs were collected from ducks kept in organized (n = 92) and backyard (n = 110) farms in West Bengal (India). The ducks had no history of antibiotic intake. Among the 87 phenotypically beta-lactamase producing Escherichia coli, 19 (17·43%), 6 (5·05%) and 15 (13·76%) isolates possessed bla_TEM , bla_SHV and bla_CTX-M respectively. Whereas, 5 (38·46%) Salmonella isolates were found to harbour bla_CTX-M . In K. pneumoniae 10 (33·33%), 3 (13·33%), 4 (13·33%) isolates possessed bla_TEM , bla_SHV and bla_CTX-M respectively. The sequences of selected PCR products were found 98% cognate with bla_CTX-M-9, bla_SHV-12 and bla_TEM-1 . Beta-lactamase producing E. coli isolates belonged to 14 different serogroups such as O1, O2, O3, O5, O7, O8, O35, O83, O84, O88, O119, O128, O145 and O157. Moreover, 87 E. coli (79·82%), six Samonella (46·15%) and 13 K. pneumoniae (43·33%) isolates were detected as AmpC producers possessing bla_AmpC . Majority of E. coli (46·79%), Salmonella (46·15%) and K. pneumoniae (70%) isolates were detected as biofilm producers and possessed the associated genes (csgA, sdiA, rcsA, rpoS). Significantly higher occurrence of beta-lactamase and biofilm producing Enterobacteriaceae isolates was detected in backyard ducks than organized farms. SIGNIFICANCE AND IMPACT OF THE STUDY: Consumption of antibiotic through feed or during therapy is considered as potential reason for generation of antimicrobial resistant bacteria in birds. This study provides valuable evidence that exposure to contaminated environment may be an additional source for generation of antimicrobial resistant bacteria in backyard ducks. The backyard ducks are reared by marginal farmers in India who cannot offer antibiotics to them either through feed or during therapy due to high cost. The study also reveals a significant correlation between biofilm formation and possession of antimicrobial resistance genes in the bacterial isolates from the ducks.

T-Cell Responses in Adults During Natural Respiratory Syncytial Virus Infection

Background

The pathogenesis of respiratory syncytial virus (RSV) in older adults may be due to age-related T-cell immunosenescence. Thus, we evaluated CD4 and CD8 T-cell responses during RSV infection in adults across the age spectrum.

Methods

Peripheral blood mononuclear cells collected during RSV infection in adults, age 26-96 years, were stimulated with live RSV and peptide pools representing F, M, NP, and G proteins and analyzed by flow cytometry.

Results

There were no significant age-related differences in frequency of CD4+ T cells synthesizing interferon (IFN)γ, interleukin (IL)2, IL4, IL10, or tumor necrosis factor (TNF)α or in CD8+IFNγ+ T cells. IL4+CD4+ T-cell numbers were low, as were IL13 and IL17 responses. However, in univariate analysis, CD4 T-cell IFNγ, IL2, IL4, IL10, and TNFα responses and CD8+IFNγ+ T cells were significantly increased with more severe illness requiring hospitalization. In multivariate analysis, viral load was also associated with increased T-cell responses.

Conclusions

We found no evidence of diminished RSV-specific CD4 or CD8 T-cell responses in adults infected with RSV. However, adults with severe disease seemed to have more robust CD4 and CD8 T-cell responses during infection, suggesting that disease severity may have a greater association with T-cell responses than age.

Variability of the EG95 antigen-coding gene of Echinococcus granulosus in animal and human origin: implications for vaccine development

In the present study, the genetic variability of the EG95 protein-coding gene in several animal and human isolates of Echinococcus granulosus was investigated. A total of 24 isolates collected from cattle, buffalo, sheep, goat, dog and man were amplified by Eg95-coding gene-specific primers. From the generated sequence information, a conceptual amino acid sequence was deduced. Phylogenetically, the Eg95 coding gene belongs to the Eg95-1/Eg95-2/Eg95-3/Eg95-4 cluster. Further confirmation on the maximum composite likelihood analysis revealed that the overall transition/transversion bias was 2.913. This finding indicated thatthere is bias towards transitional and transversional substitution. Using artificial neural networks, a B-cell epitope was predicted on primary sequence information. Stretches of amino acid residues varied between animal and human isolates when hydrophobicity was considered. Flexibility also varied between larval and adult stages of the organism. This observation is important to develop vaccines. However, cytotoxic T-lymphocyte epitopes on primary sequence data remained constant in all isolates. In this study, agretope identification started with hydrophobic amino acids. Amino acids with the same physico-chemical properties were present in the middle. The conformational propensity of the Eg95-coding gene of 156 amino acid residues had α-turns and β-turns, and α-amphipathic regions up to 129, 138-156 and 151-155 residues, respectively. The results indicated potential T-cell antigenic sites. The overall Tajima's D value was negative (-2.404165), indicative of negative selection pressure.

How frail are our elderly? An assessment with Tilburg frailty indicator (TFI) in a rural elderly population of West Bengal

Context:

“Frailty” is a multidimensional geriatric syndrome that increases the risk for adverse health outcomes, such as falls, hospitalization, increased morbidity, and mortality, among elderly persons.

Aim:

The objective of this study is to find out the proportion of frailty and its associates among elderly (aged ≥60 years) in a rural area of West Bengal.

Settings and Design:

It is a community-based cross-sectional observational study done during May–August 2018 among 165 elderly persons selected by systematic random sampling by probability proportionate to size method from three villages at the rural field practice area of our institute.

Materials and Methods:

Tilburg frailty indicator is used to measure frailty. An elderly is considered as frail if s/he scores ≥6 in this scale.

Statistical Analysis:

Data analysis is done by SPSS Version 16. The logistic regression is done to find out the associates of frailty.

Results:

Proportion of frailty is 38.8% (mean age ± SD: 67.03 ± 3.43 years) among the study subjects. Age, female gender, loss of spouse, illiteracy, economic dependency, no job/at home status, ≥2 chronic diseases are significantly associated with frailty in univariate logistic regression. In multivariable logistic regression, ≥2 chronic diseases [AOR: 8.4, CI: 4.6, 11.33] and illiteracy [AOR: 3.3, CI: 1.05, 9.8] retain their significance.

Conclusion:

Frailty should be recognized as a public health priority and awareness generation among elderly population for healthy ageing including self-motivation for proper management of their ailments should be emphasized for reduction of morbidity as well as for augmenting their quality of life.

Effect of CoFe dusting layer and annealing on the magnetic properties of sputtered Ta/W/CoFeB/CoFe/MgO layer structures

We explored the effect of a CoFe wedge inserted as a dusting layer (0.2 nm-0.4 nm thick) at the CoFeB/MgO interface of a sputtered Ta(2 nm)/W(3 nm)/CoFeB(0.9 nm)/MgO(3 nm)/Ta(2 nm) film-a typical structure for spin-orbit torque devices. Films were annealed at temperatures varying between 300 °C and 400 °C in an argon environment. Ferromagnetic resonance studies and vibrating sample magnetometry measurements were carried out to estimate the effective anisotropy field, the Gilbert damping, the saturation magnetization and the dead layer thickness as a function of the CoFe thickness and across several annealing temperatures. While the as-deposited films present only easy-plane anisotropy, a transition along the wedge from in-plane to out-of-plane was observed across several annealing temperatures, with evidence of a spin-reorientation transition separating the two regions.

Metamagnetic transition and observation of spin-fluctuations in the antiferromagnetic Heusler compound Pd2MnIn

We report detailed investigations on the structural, magnetic, magneto-transport and calorimetric aspects of a partially ordered Heusler compound Pd₂MnIn. The sample shows antiferomagnetic (AFM) state below around 120 K, though positive paramagnetic Curie temperature signifies a complex magnetic ground state with the presence of both ferromagnetic (FM) and AFM correlations. A clear spin-flop type metamagnetic transition is observed as evident from the magnetization and resistivity data. However, non-saturation of magnetization even at 145 kOe of applied field implies that the high field state may be a spin canted state, originating from the enhanced FM correlations by field induced conduction electron spin polarization. The sample shows a profound quadratic temperature dependence of resistivity below about 20-25 K indicating a spin-fluctuation dominated low temperature region. Previous electronic structure calculations show the existence of a subtle balance between superexchange mediated AFM state and an RKKY (Ruderman-Kittel-Kasuya-Yoshida) interaction mediated FM state in Pd₂MnIn. Such competing AFM-FM correlations can be accounted for the observed spin fluctuations.

One- and Two-Photon Uncaging: Carbazole Fused o-Hydroxycinnamate Platform for Dual Release of Alcohols (Same or Different) with Real-Time Monitoring

A one- and two-photon activated photoremovable protecting group (PRPG) was designed based on a carbazole fused o-hydroxycinnamate platform for the dual (same or different) release of alcohols. The mechanism for the dual release proceeds through a stepwise pathway and also monitors the first and second photorelease in real time by an increase in fluorescence intensity and color change, respectively. Further, its application in staining live neurons and ex vivo imaging with two-photon excitation is shown.