1
|
Dangi A, Debnath A, Kishore S, Jat S, Mudasir F, Nirmal T, Mukha R, Chandrasingh J, Kumar S, N’Dow J. Circumferential stricture segment metaplastic squamous mucosa & associated spongiofibrosis excision and urethroplasty by ventral approach with double face oral mucosal graft replacement. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01366-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
|
2
|
Hidangmayum A, Debnath A, Guru A, Singh BN, Upadhyay SK, Dwivedi P. Mechanistic and recent updates in nano-bioremediation for developing green technology to alleviate agricultural contaminants. Int J Environ Sci Technol (Tehran) 2022; 20:1-26. [PMID: 36196301 PMCID: PMC9521565 DOI: 10.1007/s13762-022-04560-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/29/2022] [Accepted: 09/17/2022] [Indexed: 05/09/2023]
Abstract
The rise in environmental pollutant levels in recent years is mostly attributable to anthropogenic activities such as industrial, agricultural and other activities. Additionally, these activities may produce excessive levels of dangerous toxicants such as heavy metals, organic pollutants including pesticide and herbicide chemicals, and sewage discharges from residential and commercial sources. With a focus on environmentally friendly, sustainable technology, new technologies such as combined process of nanotechnology and bioremediation are urgently needed to accelerate the cost-effective remediation process to alleviate toxic contaminants than the conventional remediation methods. Numerous studies have shown that nanoparticles possess special qualities including improved catalysis and adsorption as well as increased reactivity. Currently, microorganisms and their extracts are being used as promising, environmentally friendly catalysts for engineered nanomaterial. In the long term, this combination of both technologies called nano-bioremediation may significantly alter the field of environmental remediation since it is more intelligent, safe, environmentally friendly, economical and green. This review provides an overview of soil and water remediation techniques as well as the use of nano-bioremediation, which is made from various living organisms. Additionally, current developments related to the mechanism, model and kinetic studies for remediation of agricultural contaminants have been discussed.
Collapse
Affiliation(s)
- A. Hidangmayum
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - A. Debnath
- Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi, India
| | - A. Guru
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - B. N. Singh
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - S. K. Upadhyay
- Department of Environmental Science, V.B.S. Purvanchal University, Jaunpur, India
| | - P. Dwivedi
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| |
Collapse
|
3
|
Bhakat D, Debnath A, Naik R, Chowdhury G, Deb A, Mukhopadhyay A, Chatterjee N. Identification of common virulence factors present in enterotoxigenicEscherichia coliisolated from diarrhoeal patients in Kolkata, India. J Appl Microbiol 2018; 126:255-265. [DOI: 10.1111/jam.14090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 07/17/2018] [Accepted: 08/23/2018] [Indexed: 12/25/2022]
Affiliation(s)
- D. Bhakat
- Division of Biochemistry; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| | - A. Debnath
- Division of Biochemistry; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| | - R. Naik
- Division of Biochemistry; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| | - G. Chowdhury
- Division of Bacteriology; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| | - A.K. Deb
- Division of Epidemiology; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| | - A.K. Mukhopadhyay
- Division of Bacteriology; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| | - N.S. Chatterjee
- Division of Biochemistry; ICMR-National Institute of Cholera and Enteric Diseases; Kolkata India
| |
Collapse
|
4
|
Bhowmik K, Deb K, Bera A, Debnath A, Saha B. Interaction of anionic dyes with polyaniline implanted cellulose: Organic π-conjugated macromolecules in environmental applications. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.128] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
5
|
Debnath A, Bera A, Chattopadhyay KK, Saha B. Facile additive-free synthesis of hematite nanoparticles for enhanced adsorption of hexavalent chromium from aqueous media: Kinetic, isotherm, and thermodynamic study. INORG NANO-MET CHEM 2017. [DOI: 10.1080/24701556.2017.1357581] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- A. Debnath
- Department of Civil Engineering, National Institute of Technology Agartala, Jirania, West Tripura, India
| | - A. Bera
- Department of Physics, National Institute of Technology Agartala, Jirania, West Tripura, India
| | - K. K. Chattopadhyay
- Thin film and Nanoscience Laboratory, Department of Physics, Jadavpur University, Kolkata, India
| | - B. Saha
- Department of Physics, National Institute of Technology Agartala, Jirania, West Tripura, India
| |
Collapse
|
6
|
Crossley VJ, Debnath A, Chang YM, Fowkes RC, Elliott J, Syme HM. Breed, Coat Color, and Hair Length as Risk Factors for Hyperthyroidism in Cats. J Vet Intern Med 2017; 31:1028-1034. [PMID: 28612380 PMCID: PMC5508346 DOI: 10.1111/jvim.14737] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 02/28/2017] [Accepted: 04/11/2017] [Indexed: 12/19/2022] Open
Abstract
Background Hyperthyroidism is very common in older cats, but the etiopathogenesis is poorly understood. Decreased risk of hyperthyroidism has been reported in certain colorpoint breeds, and this observation previously has been hypothesized to result from relatively greater tyrosine availability for thyroid hormone production because of limited ability to convert tyrosine to melanin pigment. However, studies investigating a potential link between coat pigmentation and risk of hyperthyroidism are limited. Objective To identify associations between coat phenotype and hyperthyroidism by investigation of breed, coat color, and hair length as risk factors for the disease. Animals Data were used from 4,705 cats aged ≥10 years, referred to a single veterinary teaching hospital (2006–2014) in the United Kingdom. Methods Retrospective, epidemiological, cross‐sectional study using Bayesian multivariable logistic regression to assess risk factors for hyperthyroidism. Results Burmese (odds ratio [OR], 0.01; 0.00–0.23; P = .004), Tonkinese (OR, 0.05; 0.00–0.95; P = .046), Persian (OR, 0.21; 0.10–0.44; P < .001), Siamese (OR, 0.27; 0.12–0.61; P = .002), Abyssinian (OR, 0.04; 0.00–0.74; P = .031), and British shorthair (OR, 0.47; 0.28–0.79; P = .004) breeds had decreased risk of hyperthyroidism compared to domestic shorthairs. Longhaired, nonpurebred cats (OR, 1.30; 1.03–1.64; P = .028) were at increased risk of hyperthyroidism. Coat color/pattern was not associated with hyperthyroidism in nonpurebred cats. Conclusions and Clinical Importance We identified decreased risk of hyperthyroidism in the Tonkinese, Abyssinian, and British shorthair breeds, identified an association between risk of hyperthyroidism and hair length, and confirmed decreased risk in Burmese, Siamese, and Persian breeds. Additional studies are warranted to further investigate these findings.
Collapse
Affiliation(s)
- V J Crossley
- Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK
| | - A Debnath
- Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK
| | - Y M Chang
- Research Support Office, Royal Veterinary College, University of London, London, UK
| | - R C Fowkes
- Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, London, UK
| | - J Elliott
- Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, London, UK
| | - H M Syme
- Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK
| |
Collapse
|
7
|
Abstract
The SERS spectrum of taurine suggests the predominance of the gauche conformer with sulphonate and amino groups involved in binding.
Collapse
Affiliation(s)
- N. Maiti
- Radiation and Photochemistry Division
- Mumbai-400085
- India
| | - S. Thomas
- High Pressure & Synchrotron Radiation Physics Division
- Mumbai-400085
- India
| | - A. Debnath
- Technical Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - S. Kapoor
- Radiation and Photochemistry Division
- Mumbai-400085
- India
| |
Collapse
|
8
|
Debnath A, Mandal PK, Węglowska D, Dąbrowski R. Induction of a room temperature ferroelectric SmC* phase in binary mixtures with moderate spontaneous polarization and sub-millisecond switching time. RSC Adv 2016. [DOI: 10.1039/c6ra11238b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Induction of room temperature SmC* phase in binary mixture.
Collapse
Affiliation(s)
- A. Debnath
- Department of Physics
- University of North Bengal
- Siliguri-734013
- India
| | - P. K. Mandal
- Department of Physics
- University of North Bengal
- Siliguri-734013
- India
| | - D. Węglowska
- Institute of Chemistry
- Military University of Technology
- Warsaw
- Poland
| | - R. Dąbrowski
- Institute of Chemistry
- Military University of Technology
- Warsaw
- Poland
| |
Collapse
|
9
|
Debnath A, Thapa R, Chattopadhyay KK, Saha B. Spectroscopic Studies on Interaction of Congo Red with Ferric Chloride in Aqueous Medium for Wastewater Treatment. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2014.978474] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Goswami D, Sinha D, Debnath A, Mandal P, Gupta S, Haase W, Ziobro D, Dabrowski R. Molecular and dynamical properties of a perfluorinated liquid crystal with direct transition from ferroelectric SmC⁎ phase to isotropic phase. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.03.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Bala V, Debnath A, Shill A, Bose U. Anti-Inflammatory, Diuretic and Antibacterial Activities of Aerial Parts of Mucuna pruriens Linn. INT J PHARMACOL 2011. [DOI: 10.3923/ijp.2011.498.503] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
12
|
Chandra AK, Singh LH, Debnath A, Tripathy S, Khanam J. Dietary supplies of iodine & thiocyanate in the aetiology of endemic goitre in Imphal East district of Manipur, north east India. Indian J Med Res 2008; 128:601-605. [PMID: 19179679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND & OBJECTIVE The present investigation was undertaken to study the iodine nutritional status of school children of Imphal east district in Manipur where endemic goitre persists during post-salt iodization phase along with the investigation of the factors responsible for the occurrence of goitre endemicity. METHODS A total of 1,286 children (6-12 yr) were clinically examined for goitre from study areas of Imphal east district. A total of 160 urine samples were collected and analyzed to measure urinary iodine and thiocyanate levels. Iodine content was measured in 140 salt samples and 16 drinking water samples. RESULTS Overall goitre prevalence was about 30 per cent (grade 1-24.7%; grade 2-5.3%) and median urinary iodine level was 17.25 microg/dl. The mean urinary thiocyanate level was 1.073 +/- 0.39 mg/dl. Iodine/thiocyanate ratio (microg/mg) was in the ranges from 15.65 to 22.34. The mean iodine content in drinking water samples was 2.92 +/- 1.75 microg/l and 97.8 per cent of edible salts had iodine level above 15 ppm at the consumption point. INTERPRETATION & CONCLUSION Our findings showed that in spite of no biochemical iodine deficiency, iodine deficiency disorders (IDD) is a serious public health problem in Imphal east district of Manipur. The consumption pattern of certain plant foods containing thiocyanate (or its precursors) was relatively high that interfere with thyroid hormone synthesis resulting in the excretion of more iodine. Thus, the existing dietary supplies of thiocyanate in relation to iodine may be a possible aetiological factor for the persistence of endemic goitre in the study region during post salt iodization period.
Collapse
Affiliation(s)
- A K Chandra
- Department of Physiology, University of Calcutta, Kolkata, India.
| | | | | | | | | |
Collapse
|
13
|
Gomes A, Giri B, Saha A, Mishra R, Dasgupta SC, Debnath A, Gomes A. Bioactive molecules from amphibian skin: their biological activities with reference to therapeutic potentials for possible drug development. Indian J Exp Biol 2007; 45:579-93. [PMID: 17821852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The amphibian skin contains various bioactive molecules (peptides, proteins, steroids, alkaloids, opiods) that possess potent therapeutic activities like antibacterial, antifungal, antiprotozoal, antidiabetic, antineoplastic, analgesic and sleep inducing properties. Research on amphibian skin derived biomolecules can provide potential clue towards newer drug development to combat various pathophysiological conditions. An overview on the bioactive molecules of various amphibian skins has been discussed.
Collapse
Affiliation(s)
- Antony Gomes
- Laboratory of Toxinology and Experimental Pharmacodynamics, Department of Physiology, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India.
| | | | | | | | | | | | | |
Collapse
|
14
|
Giri B, Gomes A, Debnath A, Saha A, Biswas AK, Dasgupta SC, Gomes A. Antiproliferative, cytotoxic and apoptogenic activity of Indian toad (Bufo melanostictus, Schneider) skin extract on U937 and K562 cells. Toxicon 2006; 48:388-400. [PMID: 16889807 DOI: 10.1016/j.toxicon.2006.06.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2006] [Revised: 06/20/2006] [Accepted: 06/22/2006] [Indexed: 10/24/2022]
Abstract
The antiproliferative, cytotoxic and apoptogenic activities of Bufo melanostictus (Indian common toad) skin extract (TSE) on U937 and K562 leukemic cell line has been investigated. TSE significantly (P<0.001) reduced the time-dependent cell proliferation and decreased MTT values in U937 and K562 cells. TSE (IC50 doses) suppressed the proliferating cell nuclear antigen expression in both the cells. It was demonstrated that, TSE (IC50 doses) primarily arrested the U937 and K562 cells at G1 phase of the cell cycle. Confocal microscopy showed the altered fragmented nuclei and apoptotic bodies formation in TSE (IC50 doses) treated U937 and K562 cells. Membrane blebbing, cell surface shrinkage and perforation were observed through scanning electron microscope. TSE-induced DNA fragmentation in U937 and K562 cells was reflected in single-cell gel electrophoresis. TSE significantly (P<0.001) increase the length-width ratio of DNA mass as compared to control in comet assay. The flow cytometric analysis of annexin-V binding to the cancer cells further supported the apoptotogenic activity of TSE. The effect of TSE on normal human peripheral blood mononuclear cells viability and cytotoxicity was studied in culture and found to be less cytotoxic than on the U937 and K562 cells. The findings from the present study suggested that TSE might possess potent antineoplastic agent having antiproliferative, cytotoxic and apoptogenic activity against U937 and K562 myeloid leukemic cells.
Collapse
Affiliation(s)
- B Giri
- Laboratory of Toxinology and Experimental Pharmacodynamics, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata 700 009, India
| | | | | | | | | | | | | |
Collapse
|
15
|
Debnath A, Das AC, Mukherjee D. Persistence and effect of butachlor and basalin on the activities of phosphate solubilizing microorganisms in wetland rice soil. Bull Environ Contam Toxicol 2002; 68:766-770. [PMID: 12068946 DOI: 10.1007/s001280319] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- A Debnath
- Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | | | | |
Collapse
|
16
|
Mukhopadhyay P, Sengupta S, Akbar A, Sengupta K, Bhattacharya S, Debnath A, Ganguly S, Das P. Characterization of plasma membrane-associated antigens of diagnostic and prophylactic importance in Entamoeba histolytica. Arch Med Res 2000; 31:S21-2. [PMID: 11070208 DOI: 10.1016/s0188-4409(00)00228-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- P Mukhopadhyay
- Department of Microbiology, National Institute of Cholera and Enteric Diseases, Calcutta, India
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Ghosh S, Debnath A, Sil A, De S, Chattopadhyay DJ, Das P. PCR detection of Giardia lamblia in stool: targeting intergenic spacer region of multicopy rRNA gene. Mol Cell Probes 2000; 14:181-9. [PMID: 10860716 DOI: 10.1006/mcpr.2000.0302] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A PCR based detection that amplifies the 552-bp intergenic spacer (IGS) region of multicopy rRNA gene of Giardia lamblia and 320-bp internal sequences to first PCR product has been used in diagnosis of giardiasis in stool sample. The primers were found highly specific to Giardia spp. only, because no amplification was observed with DNAs from other enteric pathogens like Escherichia coli, Shigella dysenteriae and Entamoeba histolytica. The test could detect even less than 2 pg of genomic DNA from Giardia trophozoites. In direct diagnosis of Giardia lamblia in stool samples, it was observed that PCR amplification of IGS followed by nested PCR could enhance the sensitivity and specificity of the tests manifold and the system was able to detect as low as 10 parasites in 100 microl of stool. The comparative evaluation of the present system with conventional microscopy, CIEP and ELISA in the diagnosis of giardiasis from diarrhoeic stool samples and control subjects demonstrated a 100% correlation among nested PCR, microscopic examination and ELISA in patients suggestive of giardiasis (Group I) and control subjects (Group II). In Group I cases (patients suffering from other than giardiasis), CIEP, ELISA and nested PCR showed better results than microscopic examination. However, among them, PCR was found most sensitive and specific because 20% positivity was noticed by PCR whereas CIEP and ELISA showed only 7.14% and 12.85%, respectively. Break-up results showed that all the samples which were positive by CIEP or ELISA, also found positive by PCR. The present observation clearly suggests the use of PCR that amplifies the intergenic spacer region of multicopy rRNA gene of Giardia lamblia followed by nested PCR for routine, quick and reliable detection of Giardia lamblia in stool samples.
Collapse
Affiliation(s)
- S Ghosh
- Department of Biochemistry and Dr B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, India
| | | | | | | | | | | |
Collapse
|
18
|
Das P, Debnath A, Muñoz ML. Molecular mechanisms of pathogenesis in amebiasis. Indian J Gastroenterol 1999; 18:161-6. [PMID: 10531719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Though both Entamoeba histolytica and E. dispar colonize the human gut, only the former is capable of invading tissues and causing disease. Although the biology of the parasite and the mechanism of pathogenesis have been intensively studied, there is a lack of consensus about the molecules of E. histolytica that actively participate in pathogenesis. This article reviews some key molecules involved. Ga1NAc-inhibitable adhesin is a membrane-associated glycoprotein nature, consisting of heavy and light subunits; each of these is encoded by multiple genes. The heavy subunit is useful in differentiating E. histolytica from E. dispar. Three structurally similar isoforms of amebapore, A, B and C, have been identified in E. histolytica but C is absent in E. dispar. Proteolytic enzymes such as collagenase and cysteine proteinases and cytolytic enzymes like phospholipase A are important. Collagenase activity is mainly accumulated in electron-dense granules. Cysteine proteinase is encoded by six genes, of which EhCP5 is exclusively present in E. histolytica.
Collapse
Affiliation(s)
- P Das
- Department of Microbiology, National Institute of Cholera and Enteric Diseases, Beliaghata, Calcutta.
| | | | | |
Collapse
|
19
|
Bhattacharya S, Sengupta K, Sengupta S, Mukhopadhyay P, Debnath A, Das P. Antigens of diagnostic and prophylactic importance inEntamoeba histolytica. Indian J Clin Biochem 1998; 13:33-5. [PMID: 23105180 DOI: 10.1007/bf02873440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Amoebiasis, caused by an enteric protozoanEntamoeba histolytica, is one of the major parasitic diseases of mankind. Current estimate suggests that the parasite infects about 10% of the world population at any given time. There is an urgent need to characterize the antigenic molecules ofE. histolytica, and find out antigens which have both immunodiagnostic and prophylactic potential against amoebiasis. The results of somatic antigen analysis, using sera from immune or infected individuals, indicated that the wholeE. histolytica trophozoites, are highly complex and heterogeneous in nature and both immunodiagnostic and immuno prophylaxis activity remain mainly in a surface associated 29 kDa glycoprotein ofE. histolytica. Future studies at molecular level particularly, genes responsible for expression of this protein, their homology with other proteins and structure analysis will give better understanding about this polypeptide. Studies on excretory secretory antigens, clearly demonstrated thatE. histolytica like many organisms, also liberates certain antigenic moieties into the culture medium during in vitro cultivation and this antigen has similar diagnostic values like the conventional somatic antigens. It is important that the ESA should be prepared from the supernatant after collecting the cell and use for immunodiagnosis of amoebiasis. This is an additional source of antigen which will help in carrying out more tests using the same reagents. Further studies are needed to clarify the location of these molecules on the parasite, along with detailed biochemical and immunological characterization and their relation with the pathogenesis.
Collapse
Affiliation(s)
- S Bhattacharya
- Division of Microbiology, National Institute of Cholera and Enteric Diseases, P-33, CIT Road, Scheme-XM, Beliaghata, 700 010 Calcutta
| | | | | | | | | | | |
Collapse
|
20
|
Kumar S, Debnath A, Goswami A. Some aspects of Diarrhoea Training and Treatment Unit in Infectious Diseases Hospital, Calcutta. Indian J Public Health 1994; 38:81-6. [PMID: 7836003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
|
21
|
Bhattacharya SK, Bhattacharya MK, Ramamurthy T, Pal A, Bag PK, Takeda T, Shimada T, Dutta P, Debnath A, Chakraborti S. Acute secretory travellers' diarrhoea caused by Vibrio cholerae non-01 which does not produce cholera-like or heat-stable enterotoxins. J Diarrhoeal Dis Res 1992; 10:161-3. [PMID: 1430972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An Australian tourist suffering from severe acute watery diarrhoea and dehydration due to Vibrio cholerae non-01 was studied. The V. cholerae strain isolated from the patient belonged to serovar 05. The organism did not produce any of the conventional enterotoxins including cholera-toxin (CT) or heat-stable toxins (NAG-ST) that are known to be associated with intestinal secretion. This report suggests that toxin(s) other than CT-like or NAG-ST may be involved in the pathogenesis of diarrhoea by some V. cholerae non-01 strains.
Collapse
Affiliation(s)
- S K Bhattacharya
- National Institute of Cholera and Enteric Diseases, Beliaghata, Calcutta, India
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Bhattacharya MK, Nair GB, Sen D, Paul M, Debnath A, Nag A, Dutta D, Dutta P, Pal SC, Bhattacharya SK. Efficacy of norfloxacin for shigellosis: a double-blind randomised clinical trial. J Diarrhoeal Dis Res 1992; 10:146-50. [PMID: 1430968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In a double-blind, randomised, clinical trial on 122 adults with acute Shigella dysentery, 60 patients were treated with norfloxacin and 62 with nalidixic acid. Of these, 32 patients in the norfloxacin group and 28 patients in the nalidixic acid group had Shigella in their stool. Patients of the two treatment groups were clinically comparable on admission. No significant differences in clinical responses were observed in the two groups among the Shigella-positive cases, Shigella-negative cases and among the total cases. All isolates of Shigella were susceptible to norfloxacin, whereas 13.8% of the strains were resistant to nalidixic acid.
Collapse
Affiliation(s)
- M K Bhattacharya
- Department of Clinical Medicine, National Institute of Cholera and Enteric Diseases, Beliaghata, Calcutta, India
| | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Rasaily R, Bhattacharya MK, Bhattacharya SK, Debnath A, Pal SC. Diarrhoeal diseases in Calcutta. J Assoc Physicians India 1992; 40:190-4. [PMID: 1634486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- R Rasaily
- National Institute of Cholera and Enteric Diseases, Beliaghata Calcutta
| | | | | | | | | |
Collapse
|