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1.
Environ Geochem Health ; 44(3): 749-769, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34050847

RESUMO

Eutrophication level in lakes and reservoirs depends on both internal and external phosphorus (P) load. Characterization of sediment P fractionation and identifying the P pollution sources are important for assessing the bio-availability of P and the dominant P source, for effectively controlling the water pollution. For determining the availability and sources of sediment P and eutrophication status, spatio-temporal variation in different P fractionation of sediment of hyper-eutrophic Krishnagiri reservoir, Tamil Nadu, India, was investigated. Sediment average total P (TP) content ranged from 4.62 to 5.64 g/kg. Main phosphorus form was the inorganic P (IP), and it makes up to 73.4-87.7% of TP. Among the different P fraction, viz. calcium bound (Ca-P), iron bound (Fe-P), aluminium bound (Al-P), exchangeable (Ex-P) and Organic-P (Org-P), Ca-P was the dominating fraction in both IP and TP. Trend of IP fraction was as follows: Ca-P > Fe-P > Al-P > Ex-P in pre-monsoon season, Fe-P > Ca-P > Al-P > Ex-P in monsoon and Ca-P > Al-P > Fe-P > Ex-P in post-monsoon. Overall the trend was as follows Ca-P > Fe-P > Al-P > Org-P > Ex-P. Bio-available-P (BAP) fractions ranged from 35.2 to 64.0% of TP, indicating its comparative higher value. Pearson's correlation matrix revealed that there was strong correlation among the different P fractions. Factor analysis indicates that different fractions of P were the dominating factor than the other sediment parameters. The observed variation in sediment P fractionation indicate the differences in source and characterization of P which is very helpful for implementation of effective management practices in controlling pollution that arises due to phosphorus in this hyper-eutrophic reservoir.


Assuntos
Fósforo , Poluentes Químicos da Água , China , Monitoramento Ambiental , Eutrofização , Sedimentos Geológicos/análise , Índia , Lagos , Fósforo/análise , Poluentes Químicos da Água/análise
2.
Environ Monit Assess ; 194(9): 643, 2022 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-35930070

RESUMO

The present study demonstrates the spatial analysis and mapping of fish and different measures of environmental parameters and fish diversity of Pong reservoir, Himachal Pradesh, using Kriging spatial interpolation methods for geographical information system mapping. Seasonal data on environmental parameters, potential fish habitat and fish diversity was collected from lentic (dam), lentic (reservoir), transitional and lotic zone of the reservoir.. Important environmental parameters like water temperature, dissolved oxygen, electrical conductivity, water depth and transparency showed variations across the different zones of the reservoir. The sediment of the reservoir was sandy clay loam in nature as per texture analysis. Fish species richness, Shannon index and evenness index showed a similarity of the lotic and lentic (reservoir) zones of the reservoir. Six potential fish breeding grounds were identified in the reservoir indicating high conservation significance. The analysis of data showed a declining trend in fish production from 456.9 tonnes during the decade 1976-1987 to 347.91 tonnes during 2009-2020. The factors like anthropogenic climate change, predation of a stocked fish juvenile by water birds, undersized fish stocking and unscientific management are the probable reasons for the decreasing fish production. The spatial variation pattern of the water spread area, environmental parameters, fish catch and potential fish breeding grounds depicted in the GIS platform can be used as an important information base by the policy makers for fisheries management. The stocking of large size fish as a stocking material and adequate protection of the potential fish breeding grounds are the key advisories for the sustainable enhancement of fisheries as well as conservation.


Assuntos
Biodiversidade , Sistemas de Informação Geográfica , Animais , Ecossistema , Monitoramento Ambiental , Peixes , Água
3.
J Environ Manage ; 296: 113227, 2021 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-34261034

RESUMO

The adverse effect of barge movement on the river's aquatic ecosystem is of global concern. The phytoplankton community, a bioindicator, is possibly the foremost victim of the barge movement. This study hypothesized phytoplankton diversity loss induced by barge movement in a large river. This article presents a novel risk assessment framework to evaluate the hypothesis-with a goal to uncoupling phytoplankton diversity loss due to barge movement over a spatiotemporal scale. For this purpose, a study was conducted in the Bhagirathi-Hooghly stretch of Inland National Waterway 1 of India. This study has proposed a new index of diversity loss and its inferential framework based on full Bayesian Generalized Linear Mixed Model. The results have diagnosed significant barge-induced impact on the phytoplankton diversity and identified ten most impacted species. The proposed framework has successfully disentangled barge-induced phytoplankton diversity loss from the biological process and predicted a substantive overall risk of phytoplankton loss of 31.44%. Besides, it has uncoupled spatiotemporal differential estimates, suggesting a risk of diversity loss in order of 'During vs After' (38.0%) > 'Before vs After' (30.7%) > 'Before vs During' (24%) barge movement in temporal scale and increasing diversity loss along downstream. Finally, the instant study has highlighted the utility of these results to facilitate better water framework directive for inland waterways.


Assuntos
Ecossistema , Fitoplâncton , Teorema de Bayes , Biodiversidade , Rios
4.
Environ Monit Assess ; 192(Suppl 1): 810, 2021 Jan 14.
Artigo em Inglês | MEDLINE | ID: mdl-33443675

RESUMO

Mahanadi is one of the major rivers of peninsular India. Like other Indian rivers, it is contaminated with sewages, industrial discharges, and agricultural runoff. Thus, necessity was felt to monitor its pollution status. Present work was part of that program and aimed to assess the sediment contamination due to the trace metals Cd, Cr, Cu, Mn, Pb, and Zn during 2012-2015. Sediment pollution status and ecological risks were evaluated calculating contamination factor (CF), geo-accumulation (Igeo), pollution load index (PLI), potential ecological risk (EiR), etc. The recorded metal concentrations were Cd BDL of flame mode of AAS; Cr BDL - 73.9; Cu BDL - 44.4; Mn 37.2 - 1887.0; Pb BDL - 29.5; and Zn BDL - 92.5 mg kg-1. As per US EPA guidelines, Cr concentrations at many locations were in the moderately polluted range. Igeo, CF, mCd, PLI, and EiR indicated low pollution levels and low ecological risks due to the trace metals assessed. The sediment quality guidelines (SQGs) indicated that Cr and Cu concentrations exceeded (16% sample) the threshold effect concentrations and may occasionally exhibit adverse biological effects. The association of sediment organic matter, conductivity and content of Cu, and their grouping in component 1 of PCA revealed that the anthropogenic input was dominant and so also the component 2 where Cr exhibited moderately good correlation with organic matter. Cluster analysis of the sampling sites based on pollution status yielded 3 groups: relatively uncontaminated (S3, S4), low to moderately contaminated (S2), and moderately contaminated (S1, S5, S6) stretches.


Assuntos
Metais Pesados , Poluentes Químicos da Água , Monitoramento Ambiental , Sedimentos Geológicos , Índia , Metais Pesados/análise , Medição de Risco , Rios , Poluentes Químicos da Água/análise
5.
Clin Exp Dermatol ; 45(2): 172-179, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31361909

RESUMO

BACKGROUND: Noncultured extracted hair follicle outer root sheath cell suspension (NC-EHF-ORS-CS) is an upcoming surgical technique to treat stable vitiligo. Conventionally it employs trypsin to tap the hair follicle (HF) reservoir for autologous melanocytes and their precursors for transplantation. However, a perifollicular dermal sheath composed of type 1 collagen encases the target 'bulge' region of the HF. Adding collagenase type 1 would digest the ORS, facilitating better release of cells. AIM: To compare the repigmentation achieved using trypsin and a combination of collagenase plus trypsin, respectively, with dermabrasion alone, and to compare cell counts, viability and composition of both suspensions. METHODS: This was a randomized, double-blind, comparative, therapeutic trial, conducted as a pilot study on 22 patients with stable vitiligo. Three similar patches were randomized into three parallel treatment arms [(A) trypsin plus collagenase, (B) trypsin alone and (C) dermabrasion with vehicle alone]. Each patient's HF sample was divided and digested by the two methods, and transplanted as suspensions onto dermabraded patches, while a third dermabraded patch received the vehicle only. Suspensions were sent for laboratory analysis. Repigmentation was assessed over a follow-up of 6 months. RESULTS: There was a significant increase in cell yield and comparable viability when collagenase was added. Immunohistochemical and flow cytometry studies showed a nonsignificant increase in HMB45+ melanocytes and their precursor stem cells in group A. This trend was reflected clinically in the extent of repigmentation [group A (33.22%) > B (24.31%) > C (16.59%); P = 0.13]. Adding collagenase induced significantly higher repigmentation than dermabrasion alone (P < 0.05). CONCLUSIONS: Incorporating collagenase type I into the conventional NC-EHF-ORS-CS technique resulted in enhanced retrieval of pigment-forming cells and subsequently improved repigmentation in vitiligo.


Assuntos
Colagenases/farmacologia , Folículo Piloso/citologia , Melanócitos/efeitos dos fármacos , Tripsina/farmacologia , Vitiligo/cirurgia , Adulto , Técnicas de Cultura de Células , Método Duplo-Cego , Feminino , Folículo Piloso/efeitos dos fármacos , Folículo Piloso/transplante , Humanos , Queratinócitos , Masculino , Melanócitos/transplante , Projetos Piloto , Suspensões , Transplante Autólogo
6.
J Assoc Physicians India ; 67(10): 86-87, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31571465

RESUMO

Systemic capillary leak syndrome (SCLS) is a very rare disorder characterized by hypotension with heamoconcentration, hypoalbuminemia without albuminuria and generalized edema, the etiology of which are snake bites, viral heamorrhagic fever, drugs, sepsis, upper respiratory tract infection, Hanta virus and West Nile virus infection and serum paraproteinemia. Typically, the syndrome manifests in two phases: initial capillary leak phase characterized by edema, serous effusion, hypotension which is followed by phase of volume overload or recruitment phase. Treatment is in the form of fluid replacement, inotropic support and vasopressor therapy during leak phase and diuretics during volume overload phase. Prognosis of this disease is very poor. Here we are presenting a rare case of plasmodium vivax with SCLS.


Assuntos
Síndrome de Vazamento Capilar , Malária Vivax , Edema , Humanos , Hipotensão , Prognóstico
7.
Lupus ; 26(4): 348-354, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27488471

RESUMO

Nematode infections have been observed to inversely correlate with autoimmune disorders. Recently, we have shown the absence of filarial infection in patients with rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) who live in filarial-endemic areas. The mechanism(s) by which filarial-infected individuals are protected against the development of RA or SLE are unknown. In mice CIA, an experimental model for RA, ES-62, an execratory product of rodent filarial nematode , has been shown to improve arthritis through suppression of the IL-17 pathway. A total of 160 individuals, 40 each of endemic normal, filarial-infected cases, SLE and RA patients, from filarial-endemic areas, were enrolled in the study. Plasma levels of IL17-A, IFN-α and TNF-α were quantified by enzyme-linked immunosorbent assay (ELISA). RA and SLE patients displayed significantly higher plasma IL-17A, IFN-α and TNF-α levels compared to endemic normal and infected individuals. Furthermore, IL-17A levels were significantly low in participants with filarial infection compared to endemic controls ( p < 0.05). Interestingly, plasma IL-17A levels correlated inversely with circulating filarial antigen (CFA) ( p = 0.004, Spearman r = -0.51). Filarial infection was associated with low plasma IL-17A levels, a mechanism by which it possibly protects individuals in filarial-endemic areas from the development of autoimmune disorders like RA and SLE.


Assuntos
Artrite Reumatoide/imunologia , Filariose/imunologia , Interleucina-17/sangue , Lúpus Eritematoso Sistêmico/imunologia , Adolescente , Adulto , Idoso , Animais , Artrite Reumatoide/sangue , Artrite Reumatoide/parasitologia , Criança , Modelos Animais de Doenças , Regulação para Baixo , Feminino , Filariose/sangue , Humanos , Interferon-alfa/sangue , Interleucina-17/imunologia , Lúpus Eritematoso Sistêmico/sangue , Lúpus Eritematoso Sistêmico/parasitologia , Camundongos , Pessoa de Meia-Idade , Fator de Necrose Tumoral alfa/sangue , Adulto Jovem
8.
Lupus ; 24(1): 82-9, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25253568

RESUMO

INTRODUCTION: Ferritin is an acute-phase reactant that is elevated in various autoimmune disorders. Serum ferritin levels have been positively correlated with disease activity scores of rheumatoid arthritis and systemic lupus erythematosus (SLE). Further, enhanced levels of ferritin have also been reported in lupus nephritis. However, there are no reports from the Indian subcontinent. METHODS: Seventy-six female SLE patients, diagnosed on the basis of revised ACR criteria, and 50 healthy females, age matched from similar geographical areas, were enrolled in the present study. Serum levels of ferritin, IFN-α and IL-6 were quantified by enzyme-linked immunosorbent assay (ELISA). Clinical, biochemical, serological and other markers of disease activity (C3, C4 and anti-dsDNA) were measured by standard laboratory procedure. RESULTS: Serum ferritin levels were significantly higher in SLE patients compared to healthy controls (p < 0.0001). Ferritin levels positively correlated with SLE Disease Activity Index (SLEDAI) (p = 0.001, r = 0.35), anti-dsDNA (p = 0.001, r = 0.35), IFN-α (p < 0.0001, r = 0.51) and IL-6 (p < 0.0001, r = 0.65) and negatively correlated with C3 (p = 0.0006, r = -0.38) and C4 (p = 0.01, r = -0.28). Interestingly, serum levels of ferritin were positively associated with proteinuria (p = 0.001, r = 0.36), serum urea (p = 0.0004, r = 0.39) and serum creatinine (p = 0.0006, r = 0.38). CONCLUSION: Serum ferritin is an excellent marker of disease activity and renal dysfunction in SLE.


Assuntos
Ferritinas/sangue , Lúpus Eritematoso Sistêmico/sangue , Índice de Gravidade de Doença , Adulto , Anticorpos Antinucleares/sangue , Estudos de Casos e Controles , Complemento C3/metabolismo , Complemento C4/metabolismo , Creatinina/sangue , DNA/imunologia , Feminino , Humanos , Índia , Interferon-alfa/sangue , Interleucina-6/sangue , Nefrite Lúpica/sangue , Proteinúria/sangue , Ureia/sangue , Adulto Jovem
9.
Appl Opt ; 54(8): 2158-63, 2015 Mar 10.
Artigo em Inglês | MEDLINE | ID: mdl-25968397

RESUMO

The arrayed waveguide grating structure can be used as an important component in high-speed CMOS optical interconnects in silicon-on-insulator (SOI) platform. However, the performance of such device is found to be extremely sensitive to the fabrication-related errors in defining the critical features. In the absence of an appropriate analytical model, one needs to rely on numerical computation to analyze the device characteristics and fabrication tolerances. Because compact design of such a device structure has foot-print ∼mm2 and the smallest features can be as small as ∼500 nm×220 nm (waveguide cross section), it demands a huge computational budget to optimize the design parameters. A semi-analytical model using Gaussian beam approximation of guided mode profiles has been developed to analyze the output spectrum of arrayed waveguide grating and to estimate the phase errors due to waveguide inhomogeneities. This model has been validated with existing numerical methods and published experimental results. It has been observed that a probabilistic waveguide width variations of ΔW∼5 nm can cause a cross-talk degradation of about 40 dB (25 dB) for a device (operating at λ∼1550 nm) fabricated on SOI substrate with 220 nm (2 µm) device layer thickness.

10.
J Trop Pediatr ; 61(4): 295-300, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26130622

RESUMO

This cross-sectional study was done to evaluate diagnostic efficacy of urine nested polymerase chain reaction (PCR) using broad-range 16SrDNA PCR-based amplification, followed by restriction analysis and sequencing in neonatal septicemia. The study included 50 babies; 48% had vaginal delivery, 46% were preterm, 20% had a history of prolonged rupture of membranes and 56% were low birth weight (≤2500 g). Clinical presentations were lethargy (96%), respiratory distress (80%) and bleeding diathesis (16%). Absolute neutrophil count <1800/mm(3) was observed in 60%, and positive C-reactive protein in 46%. Thirty neonates had positive blood culture, and Klebsiella pneumoniae (22%) was the predominant organism. Nested urine PCR was positive in 38 (76%) and detected bacterial DNA in 8 neonates with negative blood cultures. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of nested PCR were 100, 60, 78.9, 100 and 84%, respectively, compared with blood culture. Nested PCR can detect most bacteria in single assay and identify unusual and unexpected causal agents.


Assuntos
Proteína C-Reativa/análise , Reação em Cadeia da Polimerase/métodos , RNA Ribossômico 16S/análise , Sepse/diagnóstico , Sepse/urina , Urina/microbiologia , Estudos Transversais , DNA/análise , DNA Bacteriano , Feminino , Genes de RNAr/genética , Humanos , Recém-Nascido , Klebsiella pneumoniae/isolamento & purificação , Contagem de Leucócitos , Valor Preditivo dos Testes , Sensibilidade e Especificidade , Sepse/microbiologia , Análise de Sequência de DNA , Staphylococcus aureus/isolamento & purificação
11.
Indian J Med Res ; 140(6): 766-9, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25758575

RESUMO

BACKGROUND & OBJECTIVES: Meningitis caused by Neisseria meningitidis is a fatal disease. Meningococcal meningitis is an endemic disease in Delhi and irregular pattern of outbreaks has been reported in India. All these outbreaks were associated with serogroup A. Detailed molecular characterization of N. meningitidis is required for the management of this fatal disease. In this study, we characterized antigenic diversity of surface exposed outer membrane protein (OMP) FetA antigen of N. meningitidis serogroup A isolates obtained from cases of invasive meningococcal meningitis in Delhi, India. METHODS: Eight isolates of N. meningitidis were collected from cerebrospinal fluid during October 2008 to May 2011 from occasional cases of meningococcal meningitis. Seven isolates were from outbreaks of meningococcal meningitis in 2005-2006 in Delhi and its adjoining areas. These were subjected to molecular typing of fetA gene, an outer membrane protein gene. RESULTS: All 15 N. meningitides isolates studied were serogroup A. This surface exposed porin is putatively under immune pressure. Hence as a part of molecular characterization, genotyping was carried out to find out the diversity in outer membrane protein (FetA) gene among the circulating isolates of N. meningitidis. All 15 isolates proved to be of the same existing allele type of FetA variable region (VR) when matched with global database. The allele found was F3-1 for all the isolates. INTERPRETATION & CONCLUSIONS: There was no diversity reported in the outer membrane protein FetA in the present study and hence this protein appeared to be a stable molecule. More studies on molecular characterization of FetA antigen are required from different serogroups circulating in different parts of the world.


Assuntos
Antígenos/genética , Proteínas da Membrana Bacteriana Externa/genética , Meningite/genética , Neisseria meningitidis/genética , Alelos , Antígenos/imunologia , Proteínas da Membrana Bacteriana Externa/líquido cefalorraquidiano , Genótipo , Humanos , Índia , Meningite/líquido cefalorraquidiano , Meningite/microbiologia , Meningite/patologia , Neisseria meningitidis/patogenicidade , Análise de Sequência de DNA
12.
Mar Pollut Bull ; 200: 116043, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38278014

RESUMO

The present study aimed to assess the water quality dynamics (physicochemical properties, nutrient and chlorophyll-a) in the Netravathi-Gurupur estuary, India across the space and seasons and to simplify the complex water quality dataset through a chemometric approach. The results indicated that pH, EC, temperature, alkalinity, salinity, TDS, hardness, chloride and intense mixing of suspended solids, driven by the semidiurnal tides, are the major factors affecting water quality. Spatial heterogeneity and monsoon have profound impact on nutrient distribution revealing the following values (mg l-1): phosphate-P (0.015-0.105), nitrate-N (0.016-0.094), nitrite-N (0.001-0.012), and silicate (1.83-14.50). The estuary was evaluated for suitability for brackish water fisheries. The results indicated fair water quality during pre- and post-monsoon but marginal quality in monsoon, primarily due to dilution associated with reduced salinity. The outcome of this study can be suitably utilized for the sustainable development of estuaries and their feasibility for brackish water fisheries.


Assuntos
Estuários , Qualidade da Água , Quimiometria , Monitoramento Ambiental/métodos , Pesqueiros , Índia
13.
Mar Pollut Bull ; 199: 115950, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38183833

RESUMO

Various environmental indicators were used to evaluate the water and sediment quality of the Netravathi-Gurupur estuary, India, for trace metals and pesticide pollution. The descended order of studied metal concentrations (µg/L) in the water was Fe (592.71) > Mn (98.35) > Zn (54.69) > Cu (6.64) > Cd (3.24) > Pb (2.38) > Cr (0.82) and in sediment (mg/kg) was Fe (11,396.53) > Mn (100.61) > Cr (75.41) > Zn (20.04) > Cu (12.77) > Pb (3.46) > Cd (0.02). However, pesticide residues were not detected in this estuarine environment. The various metal indexes categorised the water as uncontaminated, whereas contamination factor, enrichment factor, geo-accumulation index, degree of contamination and pollution load index indicated low to moderate sediment contamination. Multivariate statistics showed that the dominance of natural sources of trace metals with little anthropogenic impact. Improvement in water/sediment quality during the study period might be due to COVID-19 imposed lockdown.


Assuntos
Metais Pesados , Praguicidas , Poluentes Químicos da Água , Metais Pesados/análise , Estuários , Sedimentos Geológicos/química , Água , Poluentes Químicos da Água/análise , Cádmio , Chumbo , Monitoramento Ambiental , Índia , Medição de Risco
14.
Mar Pollut Bull ; 187: 114543, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36640498

RESUMO

Estuaries are the most productive transition ecosystem and phosphorus (P) plays an important role in these ecosystems. Therefore, in the present study, sequential extraction method was used to determine the abundance of five sediment P fractions (calcium (Ca-P), Iron (FeP), aluminum (AlP), exchangeable (Ex-P) and organic (OrgP) bound P) in Netravathi-Gurupur estuary, India. Total phosphorus (TP) content varied from 435-810 mg/kg (non-monsoon) and 258-699 mg/kg (monsoon). Inorganic P was dominant part. Different P fractions followed similar order (Fe-P > Ca-P > Al-P > Org-P > Ex-P) with respect to seasons. FeP was dominant fraction, indicating probable anthropogenic stress. Sediment may act as source of P as bioavailable P constituted 40-69.2 % of TP. Molar ratio of OC to Org-P in sediment indicated terrestrial sources of organic matter. However, the estimated phosphorus pollution index were lower than one except a few cases indicating less ecological risk with respect to sedimentary TP load.


Assuntos
Fósforo , Poluentes Químicos da Água , Fósforo/análise , Sedimentos Geológicos/química , Ecossistema , Estuários , Poluentes Químicos da Água/análise , Monitoramento Ambiental , Índia , China
15.
J Trop Pediatr ; 58(2): 147-50, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21602230

RESUMO

Fifty cases of severe malaria were studied for their oxidant and antioxidant status. Severe anemia (54%) was the most common presentation followed by hyperpyrexia, cerebral malaria and jaundice. Plasma malondialdehyde, protein carbonyl, nitrite, ascorbic acid and copper levels were significantly raised in cases as compared with controls (p < 0.001). Plasma ceruloplasmin, glutathione and superoxide dismutase levels were significantly decreased in children with severe malaria (p < 0.001). Plasma zinc was increased in cases but difference is not statistically significant. Significantly decreased level of nitrites and increased value of glutathione was found in patients with hemoglobinuria and jaundice, respectively. The significantly elevated malondialdehyde and protein carbonyl levels reflect the increased oxidative stress, whereas decreased levels of glutathione and superoxide dismutase point toward utilization of the antioxidants in severe malaria. Thus, changes in oxidants and antioxidants observed suggest the production of reactive oxygen species and their possible role in pathogenesis of severe malaria.


Assuntos
Antioxidantes/metabolismo , Malária/metabolismo , Oxidantes/sangue , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Adolescente , Ácido Ascórbico/sangue , Ceruloplasmina/metabolismo , Criança , Pré-Escolar , Cobre/sangue , Feminino , Glutationa/sangue , Glutationa Peroxidase/sangue , Humanos , Lactente , Masculino , Malondialdeído/sangue , Nitritos/sangue , Estudos Prospectivos , Superóxido Dismutase/sangue , Zinco/sangue
16.
RSC Adv ; 12(4): 2443-2453, 2022 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-35425236

RESUMO

Extensive piezoresponse force microscopy (PFM) and magnetic force microscopy (MFM) measurements in conjunction with piezoresponse spectroscopy have been carried out on pellets of Bi0.9A0.1FeO2.95 (A = Ba, Ca) and Bi0.9Ba0.05Ca0.05FeO2.95 co-doped ceramic samples in order to characterize their ferroelectric and magnetic nature and correlate the findings with our recent far-infrared spectroscopic studies on these samples. We are able to clearly discern the switching behavior of the 71° and 109° ferroelectric domains as distinct from that of the 180° domains in both pristine and Ba-doped bismuth ferrite samples. While substitution of Ba at the Bi site in bismuth ferrite does not affect the ferroelectric and magnetic properties to a great extent, Ca-doped samples show a decrease in their d 33 values with a concomitant increase in their magnetic behavior. These results are in agreement with the findings from our far-infrared studies.

17.
Indian J Med Microbiol ; 40(2): 223-227, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35292163

RESUMO

PURPOSE: This study was planned to determine the trends and susceptibility pattern of invasive pulmonary aspergillosis (IPA) in severely ill chronic obstructive pulmonary disease (COPD) patients admitted in pulmonary ward and ICU of our tertiary care centre. METHODS: Fifty COPD patients suspected of IPA from pulmonary ward and ICU from April 2017 to September 2018 were investigated. Samples were processed by standard methods, culture positive isolates were confirmed by MALDI-TOF MS and antifungal susceptibility testing was performed by microbroth dilution method. RESULTS: Twenty-two critically ill COPD patients were microbiologically positive for IA infection, of which 13 were classified as putative invasive aspergillosis. The most common comorbid illness associated was diabetes. A. flavus and A. fumigatus were the commonest species isolated. The minimum inhibitory concentration of the antifungals was low. Morbidity due to IPA in COPD patients was very high. CONCLUSIONS: Prevalence of IPA in the pulmonary ward and ICU was found to be 9.6%. MALDI-TOF seems to be a promising tool for aiding rapid identification especially for slow growing and non-sporulating fungi. Heightened awareness and suspicion for pulmonary mould infections along with early diagnosis can substantially alter the patient prognosis.


Assuntos
Aspergilose , Aspergilose Pulmonar Invasiva , Doença Pulmonar Obstrutiva Crônica , Estado Terminal , Humanos , Unidades de Terapia Intensiva , Aspergilose Pulmonar Invasiva/diagnóstico , Doença Pulmonar Obstrutiva Crônica/complicações , Doença Pulmonar Obstrutiva Crônica/microbiologia
18.
Front Immunol ; 13: 956478, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36119096

RESUMO

Ichthyophthirius multifiliis, a ciliated parasite causing ichthyophthiriasis (white spot disease) in freshwater fishes, results in significant economic loss to the aquaculture sector. One of the important predisposing factors for ichthyophthiriasis is low water temperature (i.e., below 20°C), which affects the health and makes freshwater fishes more susceptible to parasitic infections. During ichthyophthiriasis, fishes are stressed and acute immune reactions are compromised, which enables the aquatic bacterial pathogens to simultaneously infect the host and increase the severity of disease. In the present work, we aimed to understand the parasite-bacteria co-infection mechanism in fish. Later, Curcuma longa (turmeric) essential oil was used as a promising management strategy to improve immunity and control co-infections in fish. A natural outbreak of I. multifiliis was reported (validated by 16S rRNA PCR and sequencing method) in Pangasianodon hypophthalmus from a culture facility of ICAR-CIFRI, India. The fish showed clinical signs including hemorrhage, ulcer, discoloration, and redness in the body surface. Further microbiological analysis revealed that Aeromonas hydrophila was associated (validated by 16S rRNA PCR and sequencing method) with the infection and mortality of P. hypophthalmus, confirmed by hemolysin and survival assay. This created a scenario of co-infections, where both infectious agents are active together, causing ichthyophthiriasis and motile Aeromonas septicemia (MAS) in P. hypophthalmus. Interestingly, turmeric oil supplementation induced protective immunity in P. hypophthalmus against the co-infection condition. The study showed that P. hypophthalmus fingerlings supplemented with turmeric oil, at an optimum concentration (10 ppm), exhibited significantly increased survival against co-infection. The optimum concentration induced anti-stress and antioxidative response in fingerlings, marked by a significant decrease in cortisol and elevated levels of superoxide dismutase (SOD) and catalase (CAT) in treated animals as compared with the controls. Furthermore, the study indicated that supplementation of turmeric oil increases both non-specific and specific immune response, and significantly higher values of immune genes (interleukin-1ß, transferrin, and C3), HSP70, HSP90, and IgM were observed in P. hypophthalmus treatment groups. Our findings suggest that C. longa (turmeric) oil modulates stress, antioxidant, and immunological responses, probably contributing to enhanced protection in P. hypophthalmus. Hence, the application of turmeric oil treatment in aquaculture might become a management strategy to control co-infections in fishes. However, this hypothesis needs further validation.


Assuntos
Peixes-Gato , Infecções por Cilióforos , Coinfecção , Doenças dos Peixes , Hymenostomatida , Óleos Voláteis , Aeromonas hydrophila , Animais , Antioxidantes/uso terapêutico , Catalase , Infecções por Cilióforos/parasitologia , Infecções por Cilióforos/veterinária , Curcuma , Surtos de Doenças , Proteínas Hemolisinas , Hidrocortisona/uso terapêutico , Imunoglobulina M/uso terapêutico , Interleucina-1beta , Complexo Ferro-Dextran/uso terapêutico , Óleos Voláteis/farmacologia , RNA Ribossômico 16S , Superóxido Dismutase , Transferrinas/uso terapêutico , Água
19.
Ann Trop Paediatr ; 31(1): 81-6, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21262114

RESUMO

Two immunocompromised infants with perinatal tuberculosis are reported. Both presented with bilateral miliary mottling of the lungs. The first was a 4-month-old boy with a history of prolonged administration of prednisolone. He had tuberculous meningitis. Diagnosis was confirmed by PCR in serum and CSF. His mother had tuberculous endometritis. The second was a 1-month-old boy with perinatal HIV infection. Diagnosis was made by PCR in serum. Both parents were HIV-infected and had open pulmonary tuberculosis.


Assuntos
Tuberculose Meníngea/diagnóstico , Tuberculose Pulmonar/diagnóstico , Fármacos Anti-HIV/uso terapêutico , Anti-Inflamatórios/efeitos adversos , Antimaláricos/administração & dosagem , Antimaláricos/uso terapêutico , Quimioterapia Combinada , Endometrite/microbiologia , Feminino , Infecções por HIV/complicações , Humanos , Hospedeiro Imunocomprometido , Lactente , Recém-Nascido , Transmissão Vertical de Doenças Infecciosas , Masculino , Nevirapina/uso terapêutico , Prednisolona/efeitos adversos , Gravidez , Complicações Infecciosas na Gravidez , Radiografia , Tuberculose Meníngea/tratamento farmacológico , Tuberculose Pulmonar/diagnóstico por imagem , Tuberculose Pulmonar/tratamento farmacológico , Zidovudina/uso terapêutico
20.
Southeast Asian J Trop Med Public Health ; 42(1): 197-207, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21323183

RESUMO

Abstract. The present study was undertaken to evaluate differences between urban and rural Nepali populations in terms of hyperglycemia, socioeconomic position (SEP) and hypertension, through a community based survey in Sunsari District, eastern Nepal. Blood glucose levels were measured in participants (N = 2,006) S30 years old from urban and rural communities and were classified according to WHO criteria (1998) into normoglycemia (NGY), impaired fasting glucose (IFG), impaired glucose tolerance (IGT) and hyperglycemia (HGY). SEP was assessed by structured health interview along with anthropometric measurements and behavioral variables. Hypertension was classified per Joint National Committee (JNC-VII) criteria. Ten point three percent and 11.9% of subjects in this survey (13.3% urban and 11.0% rural) gave a family history and personal history of diabetes mellitus, respectively. Of urban participants (n = 736) with no history of diabetes 70 (9.5%) had HGY and 143 (19.4%) had glucose intolerance (IFG and IGT). Of rural participants (n = 1,270) 114 (9.0%) had HGY and 176 (13.9%) had glucose intolerance. There was an increasing trend in numbers of cases of hyperglycemia and intolerance with increasing age (chi2 198.2, p < 0.001), body mass index (BMI) (chi2 35.1, p < 0.001), SEP (chi2 48.5, p < 0.001) and hypertension (chi2 130.6, p < 0.001). Rural participants had a lower odds ratio [0.706; 95% confidence interval (CI) 0.455-1.096] of having hyperglycemia than urban participants. Individuals with medium and higher SEP had a lower odds ratio (0.878; CI 0.543-1.868) and higher odds ratio (1.405; CI 0.798-2.474), respectively, compared to individuals with lower SEP of having HGY. Both urban and rural populations are at risk for hyperglycemia and glucose intolerance. Individuals having a medium SEP had lower risk of diabetes mellitus than individuals from lower and higher SEP.


Assuntos
Diabetes Mellitus/epidemiologia , Intolerância à Glucose/epidemiologia , Hiperglicemia/epidemiologia , Hipertensão/epidemiologia , Adulto , Idoso , Glicemia/análise , Índice de Massa Corporal , Diabetes Mellitus/sangue , Feminino , Intolerância à Glucose/sangue , Comportamentos Relacionados com a Saúde , Inquéritos Epidemiológicos , Humanos , Hiperglicemia/sangue , Hipertensão/sangue , Masculino , Pessoa de Meia-Idade , Nepal/epidemiologia , Fatores Socioeconômicos
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