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BACKGROUND: Sudden upsurge in cases of COVID-19 Associated Mucormycosis (CAM) following the second wave of the COVID-19 pandemic was recorded in India. This study describes the clinical characteristics, management and outcomes of CAM cases, and factors associated with mortality. METHODS: Microbiologically confirmed CAM cases were enrolled from April 2021 to September 2021 from ten diverse geographical locations in India. Data were collected using a structured questionnaire and entered into a web portal designed specifically for this investigation. Bivariate analyses and logistic regression were conducted using R version 4.0.2. RESULTS: A total of 336 CAM patients were enrolled; the majority were male (n = 232, 69.1%), literate (n = 261, 77.7%), and employed (n = 224, 66.7%). The commonest presenting symptoms in our cohort of patients were oro-facial and ophthalmological in nature. The median (Interquartile Range; IQR) interval between COVID diagnosis and admission due to mucormycosis was 31 (18, 47) days, whereas the median duration of symptoms of CAM before hospitalization was 10 (5, 20) days. All CAM cases received antifungal treatment, and debridement (either surgical or endoscopic or both) was carried out in the majority of them (326, 97.02%). Twenty-three (6.9%) of the enrolled CAM cases expired. The odds of death in CAM patients increased with an increase in HbA1c level (aOR: 1.34, 95%CI: 1.05, 1.72) following adjustment for age, gender, education and employment status. CONCLUSION: A longer vigil of around 4-6 weeks post-COVID-19 diagnosis is suggested for earlier diagnosis of CAM. Better glycemic control may avert mortality in admitted CAM cases.
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COVID-19 , Mucormicose , Feminino , Humanos , Masculino , COVID-19/epidemiologia , Teste para COVID-19 , Índia/epidemiologia , Mucormicose/diagnóstico , Mucormicose/epidemiologia , PandemiasRESUMO
As a part of measles outbreak based surveillance undertaken by the World Health Organization India, suspected measles cases were referred for the laboratory diagnosis at National Institute of Virology (NIV) Pune and NIV Unit Bengaluru. Altogether, 4,592 serum samples were referred during 2010-2015 from the States of Karnataka (n = 1,173), Kerala (n = 559), and Maharashtra (n = 2,860). Initially, serum samples were tested in measles IgM antibody EIA and samples with measles negative and equivocal results (n = 1,954) were subjected to rubella IgM antibody detection. Overall, 62.9% (2,889/4,592) samples were laboratory confirmed measles, 27.7% (542/1,954) were laboratory confirmed rubella and remaining 25.2% (1,161/4,592) were negative for measles and rubella. The measles vaccination status was available for 1,206 cases. Among the vaccinated individuals, 50.7% (612/1,206) were laboratory confirmed measles. The contribution of laboratory confirmed measles was 493 (40.8%) from Maharashtra, 90 (7.5%) from Karnataka, and 29 (2.4%) from Kerala. Since, 1/3rd of suspected measles cases were laboratory confirmed rubella, an urgent attention needed to build rubella surveillance in India. Additional efforts are required to rule out other exanthematous disease including Dengue and Chikungunya in measles and rubella negatives. J. Med. Virol. 88:1685-1689, 2016. © 2016 Wiley Periodicals, Inc.
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Anticorpos Antivirais/sangue , Monitoramento Epidemiológico , Imunoglobulina M/sangue , Sarampo/diagnóstico , Rubéola (Sarampo Alemão)/diagnóstico , Rubéola (Sarampo Alemão)/epidemiologia , Adolescente , Criança , Pré-Escolar , Surtos de Doenças , Feminino , Humanos , Índia/epidemiologia , Lactente , Masculino , Sarampo/epidemiologia , Sarampo/imunologia , Vacina contra Sarampo , Rubéola (Sarampo Alemão)/imunologia , Rubéola (Sarampo Alemão)/virologia , Vírus da Rubéola/imunologia , Testes Sorológicos , Vacinação , Adulto JovemRESUMO
BACKGROUND & OBJECTIVES: Pipistrellus ceylonicus bat species is widely distributed in South Asia, with additional populations recorded in China and Southeast Asia. Bats are the natural reservoir hosts for a number of emerging zoonotic diseases. Attempts to isolate bat-borne viruses in various terrestrial mammalian cell lines have sometimes been unsuccessful. The bat cell lines are useful in isolation and propagation of many of the viruses harboured by bats. New stable bat cell lines are needed to help such investigations and to assist in the study of bat immunology and virus-host interactions. In this study we made an attempt to develop a cell line from P. ceylonicus bats. METHODS: An effort was made to establish cell line from embryo of P. ceylonicus species of bat after seeding to Dulbecco's modified eagle medium (DMEM) supplemented with 10 per cent foetal bovine serum; a primary cell line was established and designated as NIV-BtEPC. Mitochondrial DNA profile analysis was done using cyt-b and ND-1 gene sequences from the cell line. Phylogenetic tree was constructed using neighbour-joining algorithm for cyt-b and ND-1 genes with 1000-bootstrap replicates. RESULTS: NIV-BtEPC cell line was susceptible to Chandipura (CHPV) and novel adenovirus (BtAdv-RLM) isolated from Rousettus leschenaulti from India but did not support multiplication of a number of Bunyaviruses, Alphaviruses and Flavivirus. This might be useful for isolation of a range of viruses and investigation of unknown aetiological agents. INTERPRETATION & CONCLUSIONS: In this study, a new bat cell line was developed from P. ceylonicus. This cell line was successfully tested for the susceptibility to Chandipura and BtAdv-RLM virus isolated from bats. The approach developed and optimised in this study may be applicable to the other species of bats and this established cell line can be used to facilitate virus isolation and basic research into virus-host interaction.
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Quirópteros/embriologia , Animais , Linhagem Celular , Quirópteros/virologia , ÍndiaRESUMO
INTRODUCTION: More than 70 outbreaks of the highly pathogenic avian influenza (HPAI) H5N1 have been reported in poultry in the western and north-eastern parts of India. Therefore, in view of the recent HPAI H5N1 outbreaks in poultry, active AI surveillance encompassing wild, resident, migratory birds and poultry was undertaken during 2009-2011 in the State of West Bengal. METHODS: A total of 5722 samples were collected from West Bengal; 3522 samples (2906 fecal droppings + 616 other environmental samples) were from migratory birds and 2200 samples [1604 tracheal, cloacal swabs, environmental samples, tissue samples + 596 blood (serum)] were from domestic ducks and poultry. All tracheal, cloacal and environmental samples were processed for virus isolation. Virus isolates were detected using hemagglutination assay and identified using hemagglutination inhibition (HI) and reverse transcriptase polymerase chain reaction (RT-PCR) assays. Sequencing and phylogenetic analysis of partial region of the hemagglutinin and neuraminidase genes was done. Intravenous pathogenicity index assays were performed in chickens to assess pathogenicity of AI virus isolates. Serum samples were tested for detection of antibodies against AI viruses using HI assay. RESULTS: A total of 57 AI H9N2, 15 AI H4N6 and 15 Newcastle Disease (NDV) viruses were isolated from chickens, from both backyard and wet poultry markets; AI H4N6 viruses were isolated from backyard chickens and domestic ducks. Characterization of AI H9N2 and H4N6 viruses revealed that they were of low pathogenicity. Domestic ducks were positive for antibodies against H5 and H7 viruses while chickens were positive for presence of antibodies against AI H9N2 and NDV. CONCLUSIONS: In the current scenario of HPAI H5N1 outbreaks in West Bengal, this report shows presence of low pathogenic AI H9N2 and H4N6 viruses in chickens and domestic ducks during the period 2009-2011. This is the first report of isolation of H4N6 from India. Antibodies against AI H5 and H7 in ducks highlight the probable role of domestic ducks in the transmission of AI viruses. Human infections of H9N2 have been reported from China and Hong Kong. This necessitates implementation of prevention and control measures to limit the spread of AI viruses.
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Vírus da Influenza A/isolamento & purificação , Influenza Aviária/virologia , Doenças das Aves Domésticas/virologia , Migração Animal , Animais , Galinhas , China , Surtos de Doenças/veterinária , Patos , Hong Kong , Índia/epidemiologia , Virus da Influenza A Subtipo H5N1/classificação , Virus da Influenza A Subtipo H5N1/genética , Virus da Influenza A Subtipo H5N1/isolamento & purificação , Virus da Influenza A Subtipo H5N1/patogenicidade , Vírus da Influenza A Subtipo H9N2/classificação , Vírus da Influenza A Subtipo H9N2/genética , Vírus da Influenza A Subtipo H9N2/isolamento & purificação , Vírus da Influenza A Subtipo H9N2/patogenicidade , Vírus da Influenza A/classificação , Vírus da Influenza A/genética , Vírus da Influenza A/patogenicidade , Influenza Aviária/epidemiologia , Dados de Sequência Molecular , Filogenia , Doenças das Aves Domésticas/epidemiologia , PerusRESUMO
OBJECTIVE: To map genomic diversity of Measles virus (MeV) isolates collected during 2009-2017 from ten states of India. METHODS: Genome sequencing of Indian isolates and comparative genomics with global MeV using phylogeny, population stratification and selection pressure approaches were performed. RESULTS: The first report of complete genome sequences of forty-three Indian MeV isolates belonging to genotypes D4 (eight) and D8 (thirty-five). Three Indian isolates mapped to named strains D4-Enfield, D8-Villupuram and D8-Victoria. Indian D4 isolates deviate from standard genome length due to indels in M-F intergenic region. Estimated nucleotide substitution rates of Indian MeV derived using genome and individual genes are lower than that of global isolates. Phylogeny revealed genotype-based temporal clustering, suggesting existence of two lineages of D4 and three lineages of D8 in India. Absence of spatial clustering suggests role of cross-border travel in MeV transmission. CONCLUSIONS: Evolutionary analyses suggest the need for surveillance of MeV in India, particularly in view of diversified trajectories of D4 and D8 isolates. This study contributes to global measles epidemiology and indicates no major impact on antigenicity in Indian isolates, thereby substantiating the use of current vaccines to meet measles elimination target of 2023 set by World Health Organization for South-East Asia Region.
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Vírus do Sarampo , Sarampo , Genômica , Genótipo , Humanos , Índia/epidemiologia , Sarampo/epidemiologia , Vírus do Sarampo/genética , Filogenia , Análise de Sequência de DNARESUMO
We report the first whole-genome sequence of mumps virus isolated from a two-year-old girl with bilateral parotitis from a Chikkahallivana village in the Davangere district of Karnataka State, India. The genome of the Davangere mumps isolate was 15,384 bp in length and identical to previously published mumps virus (MuV) genomes from India. BLAST results show 99.1% identity with previously sequenced genotype C viruses isolated from the states of Maharashtra, Tamil Nadu, and Uttar Pradesh.
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Chikungunya is a mosquito-borne infection with clinical presentation of fever, arthralgia, and rash. The etiological agent Chikungunya virus (CHIKV) is generally transmitted from primates to humans through the bites of infected Aedes aegypti and Aedes albopictus mosquitoes. Outbreaks of Chikungunya occur commonly with varied morbidity, mortality, and sequele according to the epidemiological, ecological, seasonal, and geographical impact. Investigations are required to be conducted as a part of the public health service to understand and report the suspected cases as confirmed by laboratory diagnosis. Holistic sampling at a time of different types would be useful for laboratory testing, result conclusion, and reporting in a valid way. The use of serum samples for virus detection, virus isolation, and serology is routinely practiced, but sometimes serum samples from pediatric and other cases may not be easily available. In such a situation, easily available throat swabs and urine samples could be useful. It is already well reported for measles, rubella, and mumps diseases to have the virus diagnosis from throat swabs and urine. Here, we present the protocols for diagnosis of CHIKV using throat swab and urine specimens.
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Febre de Chikungunya/diagnóstico , Vírus Chikungunya/isolamento & purificação , Faringe/virologia , Urina/virologia , Animais , Linhagem Celular , Febre de Chikungunya/imunologia , Febre de Chikungunya/urina , Vírus Chikungunya/genética , Vírus Chikungunya/imunologia , Modelos Animais de Doenças , Ensaio de Imunoadsorção Enzimática , Humanos , Índia , Camundongos , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Sensibilidade e EspecificidadeRESUMO
India is considered as a hot spot for emerging infectious diseases. In the recent past many infectious diseases of emerging and re-emerging nature have entered this subcontinent and affected a large number of populations. A few examples are Nipah, Avian influenza, Pandemic influenza, severe acute respiratory syndrome corona virus and Chikungunya virus. These diseases have not only affected human and animal health but also economy of the country on a very large scale. During December 2010, National Institute of Virology, Pune detected Crimean-Congo hemorrhagic fever virus specific IgG antibodies in livestock serum samples from Gujarat and Rajasthan states. Subsequently, during January 2011 Crimean-Congo hemorrhagic fever virus was confirmed in a nosocomial outbreak, in Ahmadabad, Gujarat, India. Retrospective investigation of suspected human samples confirmed that the virus was present in Gujarat state, earlier to this outbreak. This disease has a case fatality rate ranging from 5 to 80 %. Earlier presence of hemagglutination inhibition antibodies have been detected in animal sera from Jammu and Kashmir, the western border districts, southern regions and Maharashtra state of India. The evidences of virus activity and antibodies were observed during and after the outbreak in human beings, ticks and domestic animals (buffalo, cattle, goat and sheep) from Gujarat State of India. During the year 2012, this virus was again reported in human beings and animals. Phylogenetic analysis showed that all the four isolates of 2011, as well as the S segment from specimen of 2010 and 2012 were highly conserved and clustered together in the Asian/Middle East genotype IV. The S segment of South-Asia 2 type was closest to a Tajikistan strain TADJ/HU8966 of 1990. The present scenario in India suggests the need to look seriously into various important aspects of this zoonotic disease, which includes diagnosis, intervention, patient management, control of laboratory acquired and nosocomial infection, tick control, livestock survey and this, should be done in priority before it further spreads to other states. Being a high risk group pathogen, diagnosis is a major concern in India where only a few Biosafety level 3 laboratories exist and it needs to be addressed immediately before this disease becomes endemic in India.
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Previously we have reported that, cycloart-23-ene-3ß, 25-diol (called as B2) and L-glutamine stimulated glucagon like peptide-1 (GLP-1) (7-36) amide secretion diabetic rats. The objective of present investigation was to investigate the concomitant administration of cycloart-23-ene-3ß, 25-diol+sitagliptin and L-glutamine+sitagliptin in streptozotocin - nicotinamide induced diabetic Sprague Dawley. Type 2 diabetes was induced in overnight fasted male Sprague Dawley rats pre-treated with nicotinamide (100 mg/kg, i.p.) followed by administration of streptozotocin (55 mg/kg, i.p.) 20 min after. The rats were divided into; I- non-diabetic, II- diabetic control, III- Sitagliptin (5 mg/kg, p.o.)+cycloart-23-ene-3ß, 25-diol (1 mg/kg, p.o.), IV- Sitagliptin (5 mg/kg, p.o.)+L-glutamine (1000 mg/kg, p.o.). The concomitant treatment of cycloart-23-ene-3ß, 25-diol and L-glutamine with sitagliptin was 8 weeks. Plasma glucose, body weight, food and water intake were determined every week. Glycosylated haemoglobin, lipid profile, plasma and colonic active (GLP-1) (7-36) amide, plasma and pancreatic insulin, histology of pancreata and biomarkers of oxidative stress were measured after 8(th) week treatment. Concomitant administration of cycloart-23-ene-3ß, 25-diol and L-glutamine with sitagliptin significantly (p<0.001) reduced plasma glucose, glyoxylated haemoglobin, lipid profile and oxidative stress parameters compared to diabetic control groups. Both concomitant treatment increased plasma and pancreatic insulin as well as plasma and colonic active (GLP-1) (7-36) amide secretion. Histological analysis by Gomori staining observed less destruction of pancreatic ß cells. The result obtained from this study; it is concluded that concomitant administration of cycloart-23-ene-3ß, 25-diol+sitagliptin and L-glutamine+sitagliptin showed additive antihyperglycaemic effect in diabetic rats.
Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Peptídeo 1 Semelhante ao Glucagon/metabolismo , Glutamina/farmacologia , Glutamina/uso terapêutico , Estresse Oxidativo/efeitos dos fármacos , Pirazinas/farmacologia , Triazóis/farmacologia , Triterpenos/farmacologia , Animais , Biomarcadores/metabolismo , Glicemia/metabolismo , Peso Corporal/efeitos dos fármacos , Colo/efeitos dos fármacos , Colo/metabolismo , Diabetes Mellitus Experimental/sangue , Comportamento de Ingestão de Líquido/efeitos dos fármacos , Comportamento Alimentar/efeitos dos fármacos , Peptídeo 1 Semelhante ao Glucagon/sangue , Glutamina/administração & dosagem , Hemoglobinas Glicadas/metabolismo , Insulina/sangue , Metabolismo dos Lipídeos/efeitos dos fármacos , Masculino , Niacinamida , Pâncreas/efeitos dos fármacos , Pâncreas/metabolismo , Pâncreas/patologia , Pirazinas/administração & dosagem , Pirazinas/uso terapêutico , Ratos , Ratos Sprague-Dawley , Fosfato de Sitagliptina , Coloração e Rotulagem , Estreptozocina , Triazóis/administração & dosagem , Triazóis/uso terapêutico , Triterpenos/administração & dosagem , Triterpenos/uso terapêuticoRESUMO
L-glutamine is a non-essential amino acid. It decreased blood sugar, stimulated insulin secretion in type 2 diabetic patients. The objective of the present investigation was to evaluate L-glutamine increases glucagon like peptide-1 (GLP-1) (7-36) amide secretion in streptozotocin-nicotinamide (STZ-NTM) induced diabetic Sprague Dawley rats. Molecular docking study was performed to elucidate the molecular basis for GLP-1 receptor agonistic activity. Type 2 diabetes was induced in overnight fasted Sprague Dawley rats pre-treated with nicotinamide (100 mg/kg, i.p.) followed by 20 min after administration of streptozotocin (55 mg/kg, i.p.). The rats were divided into; I - nondiabetic, II - diabetic control, III - sitagliptin (5 mg/kg, p.o.), IV - L-glutamine (250 mg/kg, p.o.), V - L-glutamine (500 mg/kg, p.o.) and VI - L-glutamine (1000 mg/kg, p.o.). The L-glutamine and sitagliptin treatment was 8 week. Plasma glucose was estimated every week. Body weight, food and water intake were recorded daily. Glycosylated haemoglobin, lipid profile, plasma and colonic active (GLP-1) (7-36) amide, mRNA expression of proglucagon GLP-1, plasma and pancreatic insulin, histology of pancreata and biomarkers of oxidative stress (superoxidase dismutase, reduced glutathione, malondialdehyde, glutathione peroxidase, glutathione S transferase) were measured after 8 week. In acute study, the rats were divided into I - glucose (2.5 g/kg, p.o.), II - sitagliptin (5 mg/kg, p.o.), III - L-glutamine (250 mg/kg, p.o.), IV - L-glutamine (500 mg/kg, p.o.) and V - L-glutamine (1000 mg/kg, p.o.). Plasma glucose, active GLP-1 (7-36) amide concentration and insulin levels were measured after glucose loading. The docking data indicated that l-glutamine bind to the GLP-1 receptor. L-glutamine decreased plasma glucose, increased plasma and pancreatic insulin, increased plasma and colonic active GLP-1 (7-36) amide secretion as well as decreased oxidative stress in streptozotocin-nicotinamide induced diabetic rats.
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Glicemia/metabolismo , Diabetes Mellitus Experimental/sangue , Diabetes Mellitus Experimental/metabolismo , Peptídeo 1 Semelhante ao Glucagon/metabolismo , Glutamina/administração & dosagem , Glutamina/farmacologia , Niacinamida/efeitos adversos , Fragmentos de Peptídeos/metabolismo , Administração Oral , Animais , Peso Corporal/efeitos dos fármacos , Colo/efeitos dos fármacos , Colo/metabolismo , Diabetes Mellitus Experimental/fisiopatologia , Ingestão de Líquidos/efeitos dos fármacos , Regulação da Expressão Gênica/efeitos dos fármacos , Peptídeo 1 Semelhante ao Glucagon/sangue , Peptídeo 1 Semelhante ao Glucagon/genética , Receptor do Peptídeo Semelhante ao Glucagon 1 , Teste de Tolerância a Glucose , Glutamina/metabolismo , Hemoglobinas Glicadas/metabolismo , Insulina/sangue , Insulina/metabolismo , Metabolismo dos Lipídeos/efeitos dos fármacos , Masculino , Simulação de Acoplamento Molecular , Estresse Oxidativo/efeitos dos fármacos , Pâncreas/efeitos dos fármacos , Pâncreas/metabolismo , Pâncreas/patologia , Fragmentos de Peptídeos/sangue , Fragmentos de Peptídeos/genética , Conformação Proteica , Pirazinas/administração & dosagem , Pirazinas/metabolismo , Pirazinas/farmacologia , Ratos , Ratos Sprague-Dawley , Receptores de Glucagon/química , Receptores de Glucagon/metabolismo , Fosfato de Sitagliptina , Triazóis/administração & dosagem , Triazóis/metabolismo , Triazóis/farmacologiaRESUMO
In previous study, we have reported cycloart-23-ene-3ß, 25-diol is an active antidiabetic constituent isolated from stem bark of Pongamia pinnata (Linn.) Pierre. The objective of the present investigation was to evaluate cycloart-23-ene-3ß, 25-diol stimulates glucagon like peptide-1 (GLP-1) (7-36) amide secretion in streptozotocin-nicotinamide induced diabetic Sprague Dawley rats. Molecular docking studies were performed to elucidate the molecular basis for GLP-1 receptor agonistic activity. Type 2 diabetes was induced in overnight fasted Sprague Dawley rats pre-treated with nicotinamide (100mg/kg, i.p.) followed by administration of streptozotocin (55 mg/kg, i.p.) 20 min after. The rats were divided into following groups; I- non-diabetic, II- diabetic control, III- sitagliptin (5mg/kg, p.o.), IV- cycloart-23-ene-3ß, 25-diol (1mg/kg, p.o.). The cycloart-23-ene-3ß, 25-diol and sitagliptin treatment was 8 week. Plasma glucose was estimated every week (week 0 to week 8). Body weight, food and water intake were recorded daily. Glycosylated haemoglobin, lipid profile, plasma and colonic active (GLP-1) (7-36) amide, mRNA expression of proglucagnon GLP-1, plasma and pancreatic insulin, histology of pancreata as well as biomarkers of oxidative stress (superoxidase dismutase, reduced glutathione, malondialdehyde, glutathione peroxidase, glutathione S transferase) were measured after 8th week treatment. In acute study, active GLP-1 (7-36) amide release, plasma glucose and insulin were measured during oral glucose tolerance test. The docking data clearly indicated cycloart-23-ene-3ß, 25-diol bind to the GLP-1 receptor. It decreased plasma glucose level, increased plasma and pancreatic insulin level as well as increased plasma and colonic active GLP-1 (7-36) amide secretion in streptozotocin-nicotinamide induced diabetic Sprague Dawley rats.
Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Peptídeo 1 Semelhante ao Glucagon/metabolismo , Niacinamida/efeitos adversos , Fragmentos de Peptídeos/metabolismo , Triterpenos/farmacologia , Animais , Biomarcadores/metabolismo , Glicemia/metabolismo , Peso Corporal/efeitos dos fármacos , Diabetes Mellitus Experimental/sangue , Diabetes Mellitus Experimental/metabolismo , Diabetes Mellitus Experimental/fisiopatologia , Ingestão de Líquidos/efeitos dos fármacos , Regulação da Expressão Gênica/efeitos dos fármacos , Peptídeo 1 Semelhante ao Glucagon/agonistas , Peptídeo 1 Semelhante ao Glucagon/química , Teste de Tolerância a Glucose , Insulina/sangue , Insulina/metabolismo , Masculino , Simulação de Acoplamento Molecular , Estresse Oxidativo/efeitos dos fármacos , Pâncreas/efeitos dos fármacos , Pâncreas/metabolismo , Fragmentos de Peptídeos/agonistas , Fragmentos de Peptídeos/química , Conformação Proteica , Pirazinas/administração & dosagem , Pirazinas/metabolismo , Pirazinas/farmacologia , Pirazinas/uso terapêutico , Ratos , Ratos Sprague-Dawley , Fosfato de Sitagliptina , Fatores de Tempo , Triazóis/administração & dosagem , Triazóis/metabolismo , Triazóis/farmacologia , Triazóis/uso terapêutico , Triterpenos/administração & dosagem , Triterpenos/metabolismo , Triterpenos/uso terapêuticoRESUMO
The study deals with the survey of different bat populations (Pteropus giganteus, Cynopterus sphinx, and Megaderma lyra) in India for highly pathogenic Nipah virus (NiV), Reston Ebola virus, and Marburg virus. Bats (n = 140) from two states in India (Maharashtra and West Bengal) were tested for IgG (serum samples) against these viruses and for virus RNAs. Only NiV RNA was detected in a liver homogenate of P. giganteus captured in Myanaguri, West Bengal. Partial sequence analysis of nucleocapsid, glycoprotein, fusion, and phosphoprotein genes showed similarity with the NiV sequences from earlier outbreaks in India. A serum sample of this bat was also positive by enzyme-linked immunosorbent assay for NiV-specific IgG. This is the first report on confirmation of Nipah viral RNA in Pteropus bat from India and suggests the possible role of this species in transmission of NiV in India.
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Quirópteros/virologia , Infecções por Henipavirus/veterinária , Vírus Nipah/genética , RNA Viral/isolamento & purificação , Animais , Surtos de Doenças , Ensaio de Imunoadsorção Enzimática , Infecções por Henipavirus/epidemiologia , Infecções por Henipavirus/virologia , Índia/epidemiologia , Vírus Nipah/classificação , Vírus Nipah/isolamento & purificação , Vírus Nipah/patogenicidade , Filogenia , RNA Viral/genética , Análise de Sequência de RNARESUMO
Avian influenza (AI) H9N2 has been reported from poultry in India. A seroepidemiological study was undertaken among poultry workers to understand the prevalence of antibodies against AI H9N2 in Pune, Maharashtra, India. A total of 338 poultry workers were sampled. Serum samples were tested for presence of antibodies against AI H9N2 virus by hemagglutination inhibition (HI) and microneutralization (MN) assays. A total of 249 baseline sera from general population from Pune were tested for antibodies against AI H9N2 and were negative by HI assay using ≥40 cut-off antibody titre. Overall 21 subjects (21/338â=â6.2%) were positive for antibodies against AI H9N2 by either HI or MN assays using ≥40 cut-off antibody titre. A total of 4.7% and 3.8% poultry workers were positive for antibodies against AI H9N2 by HI and MN assay respectively using 40 as cut-off antibody titre. This is the first report of seroprevalence of antibodies against AI H9N2 among poultry workers in India.
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Doenças dos Trabalhadores Agrícolas/epidemiologia , Anticorpos Antivirais/sangue , Vírus da Influenza A Subtipo H9N2/imunologia , Influenza Aviária/epidemiologia , Influenza Humana/epidemiologia , Doenças dos Trabalhadores Agrícolas/imunologia , Doenças dos Trabalhadores Agrícolas/virologia , Animais , Testes de Inibição da Hemaglutinação , Humanos , Índia/epidemiologia , Influenza Aviária/imunologia , Influenza Aviária/transmissão , Influenza Humana/imunologia , Influenza Humana/virologia , Testes de Neutralização , Exposição Ocupacional , Aves Domésticas , Estudos SoroepidemiológicosRESUMO
BACKGROUND: In January 2011, human cases with hemorrhagic manifestations in the hospital staff were reported from a tertiary care hospital in Ahmadabad, India. This paper reports a detailed epidemiological investigation of nosocomial outbreak from the affected area of Ahmadabad, Gujarat, India. PRINCIPAL FINDINGS: Samples from 3 suspected cases, 83 contacts, Hyalomma ticks and livestock were screened for Crimean-Congo hemorrhagic fever (CCHF) virus by qRT-PCR of which samples of two medical professionals (case C and E) and the husband of the index case (case D) were positive for CCHFV. The sensitivity and specificity of indigenous developed IgM ELISA to screen CCHFV specific antibodies in human serum was 75.0% and 97.5% respectively as compared to commercial kit. About 17.0% domestic animals from Kolat, Ahmadabad were positive for IgG antibodies while only two cattle and a goat showed positivity by qRT-PCR. Surprisingly, 43.0% domestic animals (Buffalo, cattle, sheep and goat) showed IgG antibodies in the adjoining village Jivanpara but only one of the buffalo was positive for CCHFV. The Hyalomma anatolicum anatolicum ticks were positive in PCR and virus isolation. CCHFV was isolated from the blood sample of case C, E in Vero E-6 cells and Swiss albino mice. In partial nucleocapsid gene phylogeny from CCHFV positive human samples of the years 2010 and 2011, livestock and ticks showed this virus was similar to Tajikistan (strain TAJ/H08966), which belongs in the Asian/middle east genetic lineage IV. CONCLUSIONS: The likely source of CCHFV was identified as virus infected Hyalomma ticks and livestock at the rural village residence of the primary case (case A). In addition, retrospective sample analysis revealed the existence of CCHFV in Gujarat and Rajasthan states before this outbreak. An indigenous developed IgM ELISA kit will be of great use for screening this virus in India.
Assuntos
Infecção Hospitalar/epidemiologia , Surtos de Doenças , Vírus da Febre Hemorrágica da Crimeia-Congo/isolamento & purificação , Febre Hemorrágica da Crimeia/epidemiologia , Gado/virologia , Carrapatos/virologia , Adulto , Animais , Anticorpos Antivirais/sangue , Infecção Hospitalar/virologia , Ensaio de Imunoadsorção Enzimática/métodos , Feminino , Febre Hemorrágica da Crimeia/virologia , Humanos , Imunoglobulina M/sangue , Índia/epidemiologia , Masculino , RNA Viral/genética , RNA Viral/isolamento & purificação , Reação em Cadeia da Polimerase em Tempo Real , Sensibilidade e EspecificidadeRESUMO
Experimental studies of human rotavirus infections in mice are limited and there is lack of information on the quantitative assessment of rotaviral replication and its relationship with histological changes. In the present study, consequences of human rotavirus strain, YO induced gastroenteritis in infant BALB/c mice were analyzed for the occurrence of clinical symptoms, histopathology and virological events. The infected animals developed diarrhea and dehydration and showed accumulation of vacuolated enterocytes with lodging of the rotavirus antigens and shortening of villi in the intestine over a period of 5 days. The ileum was identified as the most susceptible and supportive part of small intestine for perpetuation of rotavirus infection in mice. Rotaviral antigen/RNA in stool and RNA in intestine were detected throughout the clinical disease period. At 48-72 h post inoculation, diarrhea was at the peak (90-95%) in the infected animals with increased load of viral RNA and intense pathological lesions suggesting it as the critical time point in the course of infection. The rising titers of antirotavirus neutralizing antibodies ascertained the replication of human rotavirus strain, YO in mice. These data may contribute to the understanding of pathophysiological, immunological and virological characteristics of rotavirus infections in mice.
Assuntos
Gastroenterite , Infecções por Rotavirus , Rotavirus , Animais , Anticorpos Neutralizantes/sangue , Anticorpos Antivirais/sangue , Antígenos Virais/imunologia , Antígenos Virais/metabolismo , Linhagem Celular , Diarreia/imunologia , Diarreia/virologia , Modelos Animais de Doenças , Fezes/virologia , Gastroenterite/etiologia , Gastroenterite/imunologia , Gastroenterite/patologia , Gastroenterite/virologia , Haplorrinos , Humanos , Intestino Delgado/imunologia , Intestino Delgado/patologia , Intestino Delgado/virologia , Camundongos , Camundongos Endogâmicos BALB C , RNA Viral , Rotavirus/genética , Rotavirus/imunologia , Rotavirus/patogenicidade , Infecções por Rotavirus/complicações , Infecções por Rotavirus/imunologia , Infecções por Rotavirus/patologia , Infecções por Rotavirus/virologia , Eliminação de Partículas ViraisRESUMO
An outbreak of febrile illness with rash was reported in humans and buffaloes with pox lesions in some villages of Solapur and Kolhapur districts of Maharashtra state, India. Detailed clinico-epidemiological investigations were done with collection of blood, vesicular fluid and scab from humans and animals. A total of 166 suspected human cases from Kasegaon village in Solapur district and 185 cases were reported from 21 different villages from Kolhapur district. The attack rate in humans in Kasegaon village was 6.6% while in Kolhapur district the attack rate for buffaloes was 11.7%. Pox-like lesions were associated with fever, malaise, pain at site of lesion and axillary and inguinal lymphadenopathy in the humans. Infected buffaloes had lesions on teats, udders, external ears and eyelids. Laboratory investigations included detection of Buffalopox virus (BPXV) by electron microscopy (EM), virus isolation and polymerase chain reaction (PCR). Presence of BPXV was confirmed in 7 human cases and one buffalo in Kasegaon and 14 human cases from Kolhapur. The virus was isolated from 3 clinical specimens and Orthopoxvirus (OPXV) particles could be observed in EM. Thus, BPXV was identified as the etiological agent of the outbreak among both humans and buffaloes. Phylogenetic analysis based on the ATI and C18L gene revealed that a single strain of virus is circulating in India. Re-emergence of OPXV like BPXV is a real danger and contingency planning is needed to define prophylactic and therapeutic strategies to prevent or stop an epidemic. Considering the productivity losses caused by buffalopox infection and its zoonotic impact, the importance of control measures in reducing the economic and public health impact cannot be underestimated.