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1.
J Environ Manage ; 303: 114151, 2022 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-34844054

RESUMEN

Mangroves play a key role in ecosystem balancing and climate change mitigation. It acts as a source and sink of methane (CH4), a major greenhouse gas responsible for climate change. Energy metabolic pathways of methane production (methanogenesis) and oxidation (methanotrophy) are directly driven by sulphur (S) and nitrogen (N) metabolism and salinity in coastal wetlands. To investigate, how mangrove-degradations, affect the source-sink behaviour of CH4; the pathways of CH4, S and N were studied through whole-genome metagenomic approach. Soil samples were collected from degraded and undisturbed mangrove systems in Sundarban, India. Structural and functional microbial diversities (KEGG pathways) of CH4, S and N metabolism were analysed and correlated with labile carbon pools and physico-chemical properties of soil. Overall, the acetoclastic pathway of methanogenesis was dominant. However, the relative proportion of conversion of CO2 to CH4 was more in degraded mangroves. Methane oxidation was higher in undisturbed mangroves and the serine pathway was dominant. After serine, the ribulose monophosphate pathway of CH4 oxidation was dominant in degraded mangrove, while the xylulose monophosphate pathway was dominant in undisturbed site as it is more tolerant to salinity and higher pH. The assimilatory pathway (AMP) of S-metabolism was dominant in both systems. But in AMP pathway, adenosine triphosphate sulfurylase enzyme reads were higher in degraded mangrove, while NADPH-sulfite reductase abundance was higher in undisturbed mangrove due to higher salinity, and pH. In N-metabolism, the denitrification pathway was predominant in degraded sites, whereas the dissimilatory nitrate reduction pathway was dominant in undisturbed mangroves. The relative ratios of sulphur reducing bacteria (SRB): methanogens were higher in degraded mangrove; however, methanotrophs:methanogens was higher in undisturbed mangrove indicated lower source and greater sink capacity of CH4 in the system. Microbial manipulation in mangrove-rhizosphere for regulating major energy metabolic pathways of methane could open-up a new window of climate change mitigation in coastal wetlands.


Asunto(s)
Ecosistema , Metano , Dióxido de Carbono/análisis , Cambio Climático , Redes y Vías Metabólicas , Nitrógeno , Suelo , Azufre , Humedales
2.
J Clin Microbiol ; 58(6)2020 05 26.
Artículo en Inglés | MEDLINE | ID: mdl-32188689

RESUMEN

Diagnostic tests for foot-and-mouth disease (FMD) include the detection of antibodies against either the viral nonstructural proteins or the capsid. The detection of antibodies against the structural proteins (SP) of the capsid can be used to monitor seroconversion in both infected and vaccinated animals. However, SP tests need to be tailored to the individual FMD virus (FMDV) serotype and their sensitivity may be affected by antigenic variability within each serotype and mismatching between test reagents. As a consequence, FMD reference laboratories are required to maintain multiple type-specific SP assays and reagents. A universal SP test would simplify frontline diagnostics and facilitate large-scale serological surveillance and postvaccination monitoring. In this study, a highly conserved region in the N terminus of FMDV capsid protein VP2 (VP2N) was characterized using a panel of intertype-reactive monoclonal antibodies. This revealed a universal epitope in VP2N which could be used as a peptide antigen to detect FMDV-specific antibodies against all types of the virus. A VP2-peptide enzyme-linked immunosorbent assay (VP2-ELISA) was optimized using experimental and reference antisera from immunized, convalescent, and naïve animals (n = 172). The VP2-ELISA is universal and simple and provided sensitive (99%) and specific (93%) detection of antibodies to all FMDV strains used in this study. We anticipate that this SP test could have utility for serosurveillance during virus incursions in FMD-free countries and as an additional screening tool to assess FMD virus circulation in countries where the disease is endemic.


Asunto(s)
Virus de la Fiebre Aftosa , Fiebre Aftosa , Animales , Anticuerpos Antivirales , Cápside , Proteínas de la Cápside/genética , Bovinos , Ensayo de Inmunoadsorción Enzimática , Epítopos , Fiebre Aftosa/diagnóstico , Pruebas Serológicas
3.
Anim Biotechnol ; 31(3): 223-228, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30857447

RESUMEN

The present study was aimed to document the effect of heat stress on the transcriptional abundance of heat shock protein 70 (HSP70) mRNA in cultured cardiac cells of goat. The heart tissues (n = 6) from different goats were used for the culture study. The cardiac cells obtained from different heart tissues were cultured in 24 well cell culture plates and incubated in a humidified CO2 (5%) incubator at 37 °C. The cardiac cells were allowed to become 75-80% confluent after 72 h of incubation. Thereafter, the cardiac cells were subjected to heat exposure at 42 °C (heat exposed) for 0, 20, 60 and 100 min. The cardiac cells exposed to heat stress at 42 °C for 0 min was taken as control. The relative abundance of HSP70 mRNA was gradually up-regulated (p < .05) from 20 to 100 min of heat exposure and reached the zenith (p < .05) at 100 min of heat challenge. The present finding highlights that, HSP70 could possibly act as a cytoprotective factor and may promote cardiac cell survival against the detrimental effect of heat stress. Moreover, this study may serve as the harbinger to conduct further research work on expression kinetics of HSP70 in cardiac cells of goat including other livestock species.


Asunto(s)
Cabras/genética , Proteínas HSP70 de Choque Térmico , Respuesta al Choque Térmico/genética , Miocardio/metabolismo , Animales , Células Cultivadas , Cabras/metabolismo , Cabras/fisiología , Proteínas HSP70 de Choque Térmico/análisis , Proteínas HSP70 de Choque Térmico/genética , Proteínas HSP70 de Choque Térmico/metabolismo , Miocardio/citología
4.
Clin Exp Hypertens ; 41(6): 564-570, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30325243

RESUMEN

Aim: Role of TRPV4 channel in regulation of endothelial function in the carotid artery in deoxycorticosterone acetate (DOCA) model of hypertension in rat was studied. Methods: 8-10 weeks old albino Wistar rats divided into three groups namely Control, UNX and hypertensive animals. Vascular smooth muscle response was studied in isolated carotid artery of rat with acetylcholine, sodium nitroprusside, GSK1016790A (GSK) in presence and absence of L-NAME and indomethacin. Results: At the end of the 6th week, the mean systolic blood pressure was increased in DOCA-treated hypertensive rats (166 ± 8 mm Hg) compared to Control and UNX (125 ± 5 mm Hg). ACh (10-9 to 10-5 M) produced almost 100% relaxation in Control (Emax = 97.48 ± 1.06 %) and UNX animals (Emax = 93.16 ± 2.33 %) which was attenuated in DOCA-treated hypertensive animals (Emax = 70.85 ± 1.65 %). No significant changes seen in SNP (10-12 to 10-5 M) induced relaxation. GSK1016790A (10-12 to 10-7 M)-mediated relaxation was significantly attenuated in DOCA-treated hypertensive animals (Emax = 25.58 ± 13.60%) compared to the control (Emax = 80.59 ± 6.86%) and UNX (Emax = 87.32 ± 2.01%) animals. L-NAME (10-4 M) potently blocked GSK-induced relaxation, and a contractile response to GSK was observed in presence of L-NAME in all the three groups of animals which was sensitive to indomethacin (10-5 M). Conclusion: TRPV4 may regulate the vascular tone of rat carotid artery through an attenuated NO pathway and stimulation of the release of contractile prostanoids in the DOCA hypertensive rats.


Asunto(s)
Presión Sanguínea/fisiología , Arteria Carótida Común/fisiopatología , Endotelio Vascular/fisiopatología , Hipertensión/metabolismo , Óxido Nítrico Sintasa de Tipo III/metabolismo , Canales Catiónicos TRPV/metabolismo , Vasoconstricción/fisiología , Animales , Arteria Carótida Común/metabolismo , Acetato de Desoxicorticosterona/toxicidad , Modelos Animales de Enfermedad , Hipertensión/fisiopatología , Masculino , Ratas , Ratas Wistar
5.
J Integr Neurosci ; 15(4): 593-606, 2016 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-28093025

RESUMEN

The huge number of voxels in fMRI over time poses a major challenge to for effective analysis. Fast, accurate, and reliable classifiers are required for estimating the decoding accuracy of brain activities. Although machine-learning classifiers seem promising, individual classifiers have their own limitations. To address this limitation, the present paper proposes a method based on the ensemble of neural networks to analyze fMRI data for cognitive state classification for application across multiple subjects. Similarly, the fuzzy integral (FI) approach has been employed as an efficient tool for combining different classifiers. The FI approach led to the development of a classifiers ensemble technique that performs better than any of the single classifier by reducing the misclassification, the bias, and the variance. The proposed method successfully classified the different cognitive states for multiple subjects with high accuracy of classification. Comparison of the performance improvement, while applying ensemble neural networks method, vs. that of the individual neural network strongly points toward the usefulness of the proposed method.


Asunto(s)
Encéfalo/fisiología , Cognición/fisiología , Lógica Difusa , Aprendizaje Automático , Imagen por Resonancia Magnética/métodos , Redes Neurales de la Computación , Conjuntos de Datos como Asunto , Humanos , Pruebas Neuropsicológicas , Percepción Visual/fisiología
6.
J Intern Med ; 277(4): 373-87, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24717092

RESUMEN

Tuberculosis (TB) is an airborne infectious disease that kills almost two million individuals every year. Multidrug-resistant (MDR) TB is caused by strains of Mycobacterium tuberculosis (M. tb) resistant to isoniazid and rifampin, the backbone of first-line antitubercular treatment. MDR TB affects an estimated 500,000 new patients annually. Genetic analysis of drug-resistant MDR-TB showed that airborne transmission of undetected and untreated strains played a major role in disease outbreaks. The need for new TB vaccines and faster diagnostics, as well as the development of new drugs, has recently been highlighted. The major problem in terms of current TB research and clinical demands is the increasing number of cases of extensively drug-resistant and 'treatment-refractory' TB. An emerging scenario of adjunct host-directed therapies is intended to target pulmonary TB where inflammatory processes can be deleterious and lead to immune exhaustion. 'Target-organ-saving' strategies may be warranted to prevent damage to infected tissues and achieve focused, clinically relevant and long-lasting anti-M. tb cellular immune responses. Candidates for such interventions may be biological agents or already approved drugs that can be 're-purposed' to interfere with biologically relevant cellular checkpoints. Here, we review current concepts of inflammation in TB disease and discuss candidate pathways for host-directed therapies to achieve better clinical outcomes.


Asunto(s)
Inflamación/microbiología , Tuberculosis/terapia , Inhibidores de Histona Desacetilasas/uso terapéutico , Interacciones Huésped-Patógeno , Humanos , Inmunidad Celular , Inflamación/terapia , Mycobacterium tuberculosis/fisiología , Tuberculosis/tratamiento farmacológico , Tuberculosis/inmunología , Tuberculosis Resistente a Múltiples Medicamentos/inmunología , Tuberculosis Resistente a Múltiples Medicamentos/terapia
7.
J Intern Med ; 277(4): 388-405, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24809736

RESUMEN

The first cases of totally drug-resistant (TDR) tuberculosis (TB) were reported in Italy 10 years ago; more recently, cases have also been reported in Iran, India and South Africa. Although there is no consensus on terminology, it is most commonly described as 'resistance to all first- and second-line drugs used to treat TB'. Mycobacterium tuberculosis (M.tb) acquires drug resistance mutations in a sequential fashion under suboptimal drug pressure due to monotherapy, inadequate dosing, treatment interruptions and drug interactions. The treatment of TDR-TB includes antibiotics with disputed or minimal effectiveness against M.tb, and the fatality rate is high. Comorbidities such as diabetes and infection with human immunodeficiency virus further impact on TB treatment options and survival rates. Several new drug candidates with novel modes of action are under late-stage clinical evaluation (e.g., delamanid, bedaquiline, SQ109 and sutezolid). 'Repurposed' antibiotics have also recently been included in the treatment of extensively drug resistant TB. However, because of mutations in M.tb, drugs will not provide a cure for TB in the long term. Adjunct TB therapies, including therapeutic vaccines, vitamin supplementation and/or repurposing of drugs targeting biologically and clinically relevant molecular pathways, may achieve better clinical outcomes in combination with standard chemotherapy. Here, we review broader perspectives of drug resistance in TB and potential adjunct treatment options.


Asunto(s)
Tuberculosis Extensivamente Resistente a Drogas/terapia , Farmacorresistencia Bacteriana/genética , Tuberculosis Extensivamente Resistente a Drogas/diagnóstico , Tuberculosis Extensivamente Resistente a Drogas/epidemiología , Tuberculosis Extensivamente Resistente a Drogas/etiología , Tuberculosis Extensivamente Resistente a Drogas/inmunología , Genotipo , Salud Global , Interacciones Huésped-Patógeno , Humanos , Mutación , Mycobacterium tuberculosis/efectos de los fármacos , Mycobacterium tuberculosis/genética , Mycobacterium tuberculosis/fisiología , Nitroimidazoles/uso terapéutico , Oxazolidinonas/uso terapéutico
8.
Anaesthesia ; 75(9): 1261, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32596807
9.
J Integr Neurosci ; 14(3): 355-68, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26455882

RESUMEN

Functional magnetic resonance imaging (fMRI) makes it possible to detect brain activities in order to elucidate cognitive-states. The complex nature of fMRI data requires under-standing of the analyses applied to produce possible avenues for developing models of cognitive state classification and improving brain activity prediction. While many models of classification task of fMRI data analysis have been developed, in this paper, we present a novel hybrid technique through combining the best attributes of genetic algorithms (GAs) and ensemble decision tree technique that consistently outperforms all other methods which are being used for cognitive-state classification. Specifically, this paper illustrates the combined effort of decision-trees ensemble and GAs for feature selection through an extensive simulation study and discusses the classification performance with respect to fMRI data. We have shown that our proposed method exhibits significant reduction of the number of features with clear edge classification accuracy over ensemble of decision-trees.


Asunto(s)
Mapeo Encefálico/métodos , Encéfalo/fisiología , Cognición/fisiología , Imagen por Resonancia Magnética/métodos , Reconocimiento Visual de Modelos/fisiología , Lectura , Algoritmos , Árboles de Decisión , Humanos , Pruebas del Lenguaje , Pruebas Neuropsicológicas , Estimulación Luminosa
10.
Materials (Basel) ; 17(7)2024 Apr 08.
Artículo en Inglés | MEDLINE | ID: mdl-38612213

RESUMEN

The present study examines the high-temperature (500-800 °C) oxidation behavior of Fe-10Cr-(3,5) Al alloys and studies the effect of nanocrystalline structure and Al content on their resistance to oxidation. The nanocrystalline (NC) alloy powder was synthesized via planetary ball milling. The prepared NC alloy powder was consolidated using spark plasma sintering to form NC alloys. Subsequently, an annealing of the NC alloys was performed to transform them into microcrystalline (MC) alloys. It was observed that the NC alloys exhibit superior resistance to oxidation compared to their MC counterparts at high temperatures. The superior resistance to oxidation of the NC alloys is attributed to their considerably finer grain size, which enhances the diffusion of those elements to the metal-oxide interface that forms the protective oxide layer. Conversely, the coarser grain size in MC alloys limits the diffusion of the oxide-forming components. Furthermore, the Fe-10Cr-5Al alloy showed greater resistance to oxidation than the Fe-10Cr-3Al alloy.

11.
Front Immunol ; 13: 956478, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36119096

RESUMEN

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.


Asunto(s)
Bagres , Infecciones por Cilióforos , Coinfección , Enfermedades de los Peces , Hymenostomatida , Aceites Volátiles , Aeromonas hydrophila , Animales , Antioxidantes/uso terapéutico , Catalasa , Infecciones por Cilióforos/parasitología , Infecciones por Cilióforos/veterinaria , Curcuma , Brotes de Enfermedades , Proteínas Hemolisinas , Hidrocortisona/uso terapéutico , Inmunoglobulina M/uso terapéutico , Interleucina-1beta , Complejo Hierro-Dextran/uso terapéutico , Aceites Volátiles/farmacología , ARN Ribosómico 16S , Superóxido Dismutasa , Transferrinas/uso terapéutico , Agua
12.
Genes Immun ; 12(1): 15-22, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20861863

RESUMEN

Tuberculosis (TB) still poses a profound burden on global health, owing to significant morbidity and mortality worldwide. Although a fully functional immune system is essential for the control of Mycobacterium tuberculosis infection, the underlying mechanisms and reasons for failure in part of the infected population remain enigmatic. Here, whole-blood microarray gene expression analyses were performed in TB patients and in latently as well as uninfected healthy controls to define biomarkers predictive of susceptibility and resistance. Fc gamma receptor 1B (FCGRIB)was identified as the most differentially expressed gene, and, in combination with four other markers, produced a high degree of accuracy in discriminating TB patients and latently infected donors. We determined differentially expressed genes unique for active disease and identified profiles that correlated with susceptibility and resistance to TB. Elevated expression of innate immune-related genes in active TB and higher expression of particular gene clusters involved in apoptosis and natural killer cell activity in latently infected donors are likely to be the major distinctive factors determining failure or success in controlling M. tuberculosis infection. The gene expression profiles defined in this study provide valuable clues for better understanding of progression from latent infection to active disease and pave the way for defining predictive correlates of protection in TB.


Asunto(s)
Perfilación de la Expresión Génica , Predisposición Genética a la Enfermedad , Tuberculosis/genética , Tuberculosis/inmunología , Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Tuberculosis/fisiopatología , Adulto Joven
13.
Indian J Med Res ; 133: 316-21, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21441687

RESUMEN

BACKGROUND & OBJECTIVES: A large number of cases of undiagnosed fever and joint pain were reported from different parts of the State of Orissa since February 2006. Epidemiological and laboratory investigation were carried out to confirm the cause of emerging illness, which was provisionally suspected as Chikungunya (CHIK) fever. METHODS: Upon getting the reports of suspected CHIK like illness in different parts of the State, epidemic investigations were carried out in the outbreak affected villages. Case history was recorded, clinical examination undertaken and blood samples collected for seroconfirmation for CHIK IgM antibody using ELISA based kit. Simultaneously vector survey was also carried out. RESULTS: With no previous record of CHIK infection in the State, the first outbreak was confirmed during February 2006. Subsequently, the infection spread to 13 of 30 districts in different episodes covering 79 villages till November 2007. Attack rate was 9-43 per cent in the different outbreaks with average seropositivity of 24 per cent to CHIK specific IgM. Morbidity was high though no deaths were recorded. Aedes aegypti and Ae. albopictus were identified as the possible vectors for transmission. INTERPRETATION & CONCLUSIONS: The report confirmed emergence of CHIK infection in the State of Orissa, India, and its spread to a larger geographic zone in a short period which warrants public health measures to control further spread.


Asunto(s)
Infecciones por Alphavirus/transmisión , Virus Chikungunya/aislamiento & purificación , Infecciones por Alphavirus/diagnóstico , Infecciones por Alphavirus/epidemiología , Técnicas de Laboratorio Clínico , Brotes de Enfermedades , Ensayo de Inmunoadsorción Enzimática , Humanos , India/epidemiología
14.
Epidemiol Infect ; 137(10): 1494-504, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19288960

RESUMEN

The importance of carrier animals (those in whom virus persists after recovery from disease or acute infection) and their potential role in the spread of disease remain open questions within foot-and-mouth disease epidemiology. Using simple probabilistic models we attempt to quantify the effect of emergency vaccination--and especially the time of application--on the likely number of such animals, using data from challenge experiments on both cattle and sheep to determine the probability of persistence in diseased and subclinically infected animals. We show that the number of persistently infected animals in a group is predominantly determined by the number of animals initially infected on premises--the high variability of which ultimately limits the accuracy of any predictions of carrier numbers based upon transmission models. Furthermore, results suggest that, within a cattle herd, carrier numbers may be increased if challenge occurs shortly after vaccination. We show that the quality of inspection is the principal factor influencing whether or not carrier herds occur and that, by reducing clinical signs, the application of vaccination in regularly checked stock also results in an increase in undetected persistently infected animals. Where clinical detection would be poor regardless of the use of vaccination (i.e. particularly in sheep), vaccination will result in a reduction in the probability of a group containing undetected carriers: otherwise there is a benefit only if vaccination is applied sufficiently far in advance of any challenge. The implications of the results for serosurveillance are discussed, including the requisite test sensitivity and practices for successful implementation.


Asunto(s)
Portador Sano/epidemiología , Portador Sano/virología , Enfermedades de los Bovinos/epidemiología , Virus de la Fiebre Aftosa/aislamiento & purificación , Fiebre Aftosa/epidemiología , Enfermedades de las Ovejas/epidemiología , Vacunas Virales/inmunología , Animales , Bovinos , Enfermedades de los Bovinos/inmunología , Enfermedades de los Bovinos/prevención & control , Enfermedades de los Bovinos/transmisión , Fiebre Aftosa/inmunología , Fiebre Aftosa/prevención & control , Fiebre Aftosa/transmisión , Virus de la Fiebre Aftosa/inmunología , Modelos Teóricos , Ovinos , Enfermedades de las Ovejas/inmunología , Enfermedades de las Ovejas/prevención & control , Enfermedades de las Ovejas/transmisión
15.
J Stomatol Oral Maxillofac Surg ; 119(3): 169-171, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29247820

RESUMEN

PURPOSE: This study aimed at assessing the change in salivary opiorphin levels before and after administration of local anesthesia, with the use of three different local anesthetic agents, and different anaesthetic techniques. METHODS: The investigators implemented a randomized controlled clinical study in 144 patients who required tooth extraction after administration of local anaesthesia. A total of 288 samples were collected in sterile containers before and after administration of local anesthetics. The salivary samples were centrifuged and salivary opiorphin levels were estimated using ELISA testing and spectrophotometric analysis. Statistical analysis was done using one way ANOVA and unpaired t test. RESULTS: There was a mean decrease in salivary opiorphin levels after administration of local anesthesia. There was no significant difference in the change in salivary opiorphin levels across different anesthetic techniques and different drug subgroups. CONCLUSION: The present study did not show much association between various local anesthetic agents and techniques and change in salivary opiorphin levels. The role of opiorphin as a biomarker for pain control and its effect on various pain control methods including local anesthesia must be evaluated in detail. Institutional review board number SRMDC/IRB/2014/MDS/No. 405.


Asunto(s)
Oligopéptidos , Proteínas y Péptidos Salivales , Análisis de Varianza , Humanos , Manejo del Dolor
16.
Rev Sci Tech ; 26(2): 351-72, 2007 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-17892157

RESUMEN

Molecular biology and technical advances in DNA recombination have ushered in a new era in vaccinology. This article examines the recent development of specific marker vaccines and examines the impact of their use on the diagnosis and prevention of major infectious diseases. Gene-deleted vaccines, DIVA strategies (differentiating infected from vaccinated animals) and similar methods have been successfully applied in the control and eradication of Aujeszky's disease, infectious bovine rhinotracheitis, classical swine fever, foot and mouth disease and, recently, avian influenza. The efficacy and performance of existing marker vaccines and their companion diagnostic tools (which should be assesed by an independent body) are discussed, as are the ways in which these tools are deployed by competent authorities. The limits and the advantages of the use of marker vaccines are carefully analysed in the light of practical experiences. Although these vaccines can limit the speed and the extent of virus dissemination and thus reduce the number of animals slaughtered, marker vaccines are no substitute for sanitary measures. Early detection and warning systems and the quick implementation of sanitary measures, including stamping out, remain key issues in the control of highly contagious diseases.


Asunto(s)
Enfermedades de los Animales/diagnóstico , Enfermedades de los Animales/prevención & control , Vacunación/veterinaria , Vacunas Marcadoras , Animales , Diagnóstico Diferencial , Vacunación/métodos , Vacunas Virales/inmunología
17.
Vet Rec ; 160(19): 647-54, 2007 May 12.
Artículo en Inglés | MEDLINE | ID: mdl-17496271

RESUMEN

During a field study in Zimbabwe, clinical specimens were collected from 403 cattle in six herds, in which the history of foot-and-mouth disease (FMD) vaccination and infection appeared to be known with some certainty. Five herds had reported outbreaks of disease one to five months previously but clinical FMD had not been observed in the sixth herd. A trivalent vaccine (South African Territories [SAT] types 1, 2 and 3) had been used in some of the herds at various times either before and/or after the recent outbreaks of FMD. The primary aim of this study was to evaluate the performance of serological tests for the detection of SAT-type FMD virus infection, particularly elisas for antibodies to non-structural proteins (NSPs) of FMD virus and solid phase competition ELISAS (SPCEs) for serotypes SAT1 and SAT2. Secondary aims were to examine NSP seroconversion rates in cattle that had been exposed to infection and to compare virus detection rates by virus isolation and real-time reverse transcriptase-PCR (rtRT-PCR) tests on both oesophagopharyngeal fluids and nasopharyngeal brush swabbings. In addition, the hooves of sampled animals were examined for growth arrest lines as clinical evidence of FMD convalescence. Laboratory tests provided evidence of FMD virus infection in all six herds; SAT2 viruses were isolated from oesophagopharyngeal fluids collected from two herds in northern Zimbabwe, and SAT1 viruses were isolated from three herds in southern Zimbabwe. Optimised rtRT-PCR was more sensitive than virus isolation at detecting FMD virus persistence and when the results of the two methods were combined for oesophagopharyngeal fluids, between 12 and 35 per cent of the cattle sampled in the convalescent herds were deemed to be carriers. In contrast, nasopharyngeal swabs yielded only two virus-positive specimens. The overall seroprevalence in the five affected herds varied with the different NSPS from 56 per cent to 75 per cent, compared with 81 per cent and 91 per cent by homologous SPCE and virus neutralisation tests respectively. However, if serological test results were considered only for the cattle in which persistent infection with FMD virus had been demonstrated, 70 to 90 per cent scored seropositive in the different NSPs.


Asunto(s)
Anticuerpos Antivirales/sangre , Enfermedades de los Bovinos/epidemiología , Virus de la Fiebre Aftosa/inmunología , Fiebre Aftosa/epidemiología , Animales , Bovinos , Enfermedades de los Bovinos/sangre , Enfermedades de los Bovinos/diagnóstico , Brotes de Enfermedades/veterinaria , Ensayo de Inmunoadsorción Enzimática/métodos , Ensayo de Inmunoadsorción Enzimática/veterinaria , Fiebre Aftosa/sangre , Fiebre Aftosa/diagnóstico , Virus de la Fiebre Aftosa/clasificación , Virus de la Fiebre Aftosa/aislamiento & purificación , Pezuñas y Garras/patología , Pruebas de Neutralización/veterinaria , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/métodos , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/veterinaria , Sensibilidad y Especificidad , Estudios Seroepidemiológicos , Serotipificación/veterinaria , Zimbabwe/epidemiología
18.
Materials (Basel) ; 10(3)2017 Mar 09.
Artículo en Inglés | MEDLINE | ID: mdl-28772633

RESUMEN

Structural changes during the deformation-induced synthesis of nanocrystalline Fe-10Cr-3Al alloy powder via high-energy ball milling followed by annealing and rapid consolidation by spark plasma sintering were investigated. Reduction in crystallite size was observed during the synthesis, which was associated with the lattice expansion and rise in dislocation density, reflecting the generation of the excess grain boundary interfacial energy and the excess free volume. Subsequent annealing led to the exponential growth of the crystallites with a concomitant drop in the dislocation density. The rapid consolidation of the as-synthesized nanocrystalline alloy powder by the spark plasma sintering, on the other hand, showed only a limited grain growth due to the reduction of processing time for the consolidation by about 95% when compared to annealing at the same temperature.

19.
Transbound Emerg Dis ; 64(2): 513-519, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26200233

RESUMEN

Peste des petits ruminants (PPR) is an economically important disease of small ruminants with a rapidly expanding geographical distribution. Peste des petits ruminants virus may manifest in a variety of ways with disease ranging from acute to subclinical. We investigated the exposure of large ruminants to PPRV in areas where the virus is endemic in the small ruminant population by assessing the serological status of groups of animals. This study focused on the Punjab province of Pakistan as an area where the virus is endemic and where mixed farming practices occur enabling close interactions between small and large ruminant populations. An overall PPR seropositivity was detected in 10.0% of cattle and 14.16% of buffaloes. Following an assessment of serological profiles in large ruminants within different age groups, a maximum seroprevalence was observed in cattle (17.5%) and buffaloes (22.5%) over 2 years of age indicating the potential utility of sampling large ruminant populations for PPR serosurveillance. The large ruminants sampled between one and two years of age had similar levels of seropositivity within populations with 11.2% and 16.2% of animals being seropositive, respectively. Current PPR vaccination strategies do not enable the differentiation between infected and vaccinated small ruminants, and as such, the serological surveillance of sheep and goats is of little value. When considering eradication programmes for PPRV, this factor is of great significance. However, where large and small ruminants are farmed together, serological surveillance of large ruminants may provide a snapshot of virus infection within populations where mild disease is present or where small ruminants are regularly vaccinated.


Asunto(s)
Anticuerpos Antivirales/sangre , Virus de la Peste de los Pequeños Rumiantes/inmunología , Animales , Búfalos/virología , Bovinos/virología , Ensayo de Inmunoadsorción Enzimática/veterinaria , Pakistán/epidemiología , Peste de los Pequeños Rumiantes/epidemiología , Estudios Seroepidemiológicos
20.
J Perinatol ; 37(8): 911-921, 2017 08.
Artículo en Inglés | MEDLINE | ID: mdl-28492525

RESUMEN

OBJECTIVE: To examine the timing and microbiology of neonatal sepsis in a population-based surveillance in the Indian community setting. STUDY DESIGN: All live born infants in 223 villages of Odisha state were followed at home for 60 days. Suspect sepsis cases were referred to study hospitals for further evaluation including blood culture. RESULTS: Of 12 622 births, 842 were admitted with suspected sepsis of whom 95% were 4 to 60 days old. Culture-confirmed incidence of sepsis was 6.7/1000 births with 51% Gram negatives (Klebsiella predominating) and 26% Gram positives (mostly Staphylococcus aureus). A very high level of resistance to penicillin and ampicillin, moderate resistance to cephalosporins and extremely low resistance to Gentamicin and Amikacin was observed. CONCLUSION: The bacterial burden of sepsis in the Indian community is not high. Judicious choice of empiric antibiotics, antibiotic stewardship and alternate modalities should be considered for the management or prevention of neonatal sepsis in India.


Asunto(s)
Antibacterianos , Klebsiella , Sepsis Neonatal , Staphylococcus aureus , Antibacterianos/clasificación , Antibacterianos/uso terapéutico , Manejo de la Enfermedad , Farmacorresistencia Microbiana , Femenino , Humanos , Incidencia , India/epidemiología , Recién Nacido , Klebsiella/efectos de los fármacos , Klebsiella/aislamiento & purificación , Masculino , Sepsis Neonatal/epidemiología , Sepsis Neonatal/microbiología , Sepsis Neonatal/prevención & control , Staphylococcus aureus/efectos de los fármacos , Staphylococcus aureus/aislamiento & purificación
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