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Selvaganapathi R, Jeyasekaran G, Shakila RJ, Sukumar D, Kumar MP, Sivaraman B. Occurrence of Listeria monocytogenes on the seafood contact surfaces of Tuticorin Coast of India. J Food Sci Technol 2018; 55:2808-2812. [PMID: 30042598 DOI: 10.1007/s13197-018-3230-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/26/2018] [Accepted: 05/10/2018] [Indexed: 11/29/2022]
Abstract
Listeria monocytogenes was screened from different seafood contact surfaces in five sampling sites of fishing harbour, fish landing centers, seafood processing plants, fish market, and fish curing yards of Tuticorin Coast of India. 115 swab samples were collected and tested for the occurrence of L. monocytogenes by conventional and molecular methods. Overall, 5.22% of swab samples collected were positive for L. monocytogenes. The fishing harbour had high incidence (10.3%) of L. monocytogenes followed by fish landing centers (5.9%), and seafood processing plants (4.1%). Boat deck, fish transport tricycle were the two seafood contact surfaces in fishing harbour, which had the occurrence of L. monocytogenes. The swab samples from fish market and fish curing yards were negative for L. monocytogenes. All the isolated colonies of L. monocytogenes were confirmed by PCR assay targeting virulent hlyA gene. The DNA of all the isolates yielded a product of 174 bp on PCR amplification in comparison with L. monocytogenes Type culture (MTCC 1143). The results clearly indicated the occurrence of L. monocytogenes in seafood contact surfaces along the Tuticorin Coast of India.
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Affiliation(s)
- R Selvaganapathi
- 1Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Tuticorin, Tamil Nadu 628 008 India
| | - G Jeyasekaran
- 1Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Tuticorin, Tamil Nadu 628 008 India
| | - R Jeya Shakila
- 1Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Tuticorin, Tamil Nadu 628 008 India
| | - D Sukumar
- 2Directorate of Fisheries Technology Transfer and Incubation Centre, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Tuticorin, Tamil Nadu 628 008 India
| | - M Palani Kumar
- 1Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Tuticorin, Tamil Nadu 628 008 India
| | - B Sivaraman
- 1Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Fisheries University, Tuticorin, Tamil Nadu 628 008 India
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Kumar MP, Vairamani M, Raju RP, Lobo C, Anbumani N, Kumar CPG, Menon T, Shanmugasundaram S. Rapid discrimination between strains of beta haemolytic streptococci by intact cell mass spectrometry. Indian J Med Res 2004; 119:283-8. [PMID: 15243166] [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: 04/30/2023] Open
Abstract
BACKGROUND & OBJECTIVES Beta haemolytic streptococci belonging to Lancefield group A, B, C and G cause a wide spectrum of clinical diseases. Hence there is a need for rapid and accurate typing of these strains. The present study was undertaken to evaluate the use of intact cell matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) for rapid discrimination between strains of beta haemolytic streptococci. METHODS Colonies of beta haemolytic streptococci were emulsified with chemical matrix on the sample slide, dried and analyzed by MALDI-TOF-MS. RESULTS The reproducibility of results for all groups of beta haemolytic streptococci was good and spectra obtained for Lancefield group A, C and G streptococci showed discrimination between the groups on visual comparison. A finer difference in spectrum was observed among group A streptococci isolated from different locations at different periods of time. INTERPRETATION & CONCLUSION MALDI-TOF-MS may be a potential tool in discriminating between strains of beta haemolytic streptococci, and also in the characterisation of untypable strains of group A streptococci.
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Affiliation(s)
- M Palani Kumar
- Department of Microbiology, Dr ALM Postgraduate Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai, India
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Menon T, Shanmugasundaram S, Kumar MP, Kumar CPG. Group A streptococcal infections of the pharynx in a rural population in south India. Indian J Med Res 2004; 119 Suppl:171-3. [PMID: 15232188] [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: 04/30/2023] Open
Abstract
BACKGROUND & OBJECTIVES There has been a resurgence in the incidence of rheumatic heart disease all over the world and hence surveillance and strain characterization are important. The aim of this study was to screen children in a rural community in south India for throat carriage of group A streptococci and to clinically assess them for signs of rheumatic heart disease. METHODS Throat swabs were collected from children (5-14 yr) in the village of Orathur, Tamil Nadu and cultured on tryptose blood agar plates. Beta haemolytic streptococci were serogrouped using Streptex kit and biotyped based on their ability to ferment carbohydrates and production of beta-glucuronidase enzyme. Blood samples were also collected and antibodies to streptolysin O demonstrated by latex agglutination tests. All the children were examined by a paediatrician; ECG and echocardiography were performed to assess cardiac function. RESULTS Eighty of the 310 children included in the study had symptoms of acute respiratory infections; 16 of them grew beta haemolytic streptococci of which 8 belonged to group A (10%). Biotype 4 was most common. Antistreptolysin O (ASO) test did not correlate with culture results. Two of 310 children had rheumatic heart disease but both were culture negative. INTERPRETATION & CONCLUSION Pharyngeal carriage of group A streptococci was common in this population. The prevalence of rheumatic heart disease was 0.6 per cent. The study emphasizes the need for active surveillance and characterization of GAS isolates.
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Affiliation(s)
- Thangam Menon
- Department of Microbiology, Dr ALM PGIBMS, University of Madras, Chennai, India.
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Abstract
Thirty-eight isolates of group A streptococci from patients with pharyngitis, 13 isolates from patients with pyoderma and 28 carrier strains were subjected to biotyping by carbohydrate fermentation tests and production of beta-glucuronidase. Biotype 10 was observed most frequently among clinical isolates and biotypes 3 and 4 were most common among carrier isolates.
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Affiliation(s)
- M Palani Kumar
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai - 600 113, India 2Department of Cardiology, Stanley Medical College, Chennai - 600 001, India
| | - Thangam Menon
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai - 600 113, India 2Department of Cardiology, Stanley Medical College, Chennai - 600 001, India
| | - Charmaine Lobo
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai - 600 113, India 2Department of Cardiology, Stanley Medical College, Chennai - 600 001, India
| | - N Anbumani
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai - 600 113, India 2Department of Cardiology, Stanley Medical College, Chennai - 600 001, India
| | - C P Girish Kumar
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai - 600 113, India 2Department of Cardiology, Stanley Medical College, Chennai - 600 001, India
| | - S Shanmugasundaram
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai - 600 113, India 2Department of Cardiology, Stanley Medical College, Chennai - 600 001, India
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Menon T, Shanmugasundaram S, Kumar MP, Kumar CPG. Occurrence of group C Streptococci in children in a South Indian village. INDIAN J PATHOL MICR 2003; 46:528-9. [PMID: 15025333] [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: 04/29/2023] Open
Abstract
Throat swabs were collected from 310 children aged 5-14 years attending a rural health camp at Orathur near Chennai. Group C Streptococci were isolated from 13/310 (4.19%) cases. Seven out of 13 patients had symptoms of respiratory tract infection. Biochemical characterization of the isolates was done by hemolytic characteristics, Voges-Proskauer test, fermentation of trehalose and sorbitol and hydrolysis of 4-methylumbelliferyl-D-â-glucuronide. Four out of 13 strains were identified as S. equisimilis.
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Affiliation(s)
- Thangam Menon
- Department of Microbiology, Dr. ALM PGIBMS, University of Madras, Taramani, Chennai.
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Menon T, Whatmore AM, Srivani S, Kumar MP, Anbumani N, Rajaji S. EMM types of Streptococcus pyogenes in Chennai. Indian J Med Microbiol 2001; 19:161-2. [PMID: 17664825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The M protein of group A Streptococcus (GAS) is the major virulence factor and is coded by the emm gene. The current serologic M typing methods are now being replaced by alternate means of M type deduction such as emm gene sequencing. This is the first report of emm types of GAS which are prevalent in south India. We found no marked preponderance of any single emm sequence among our clinical isolates with 11 emm sequences being present in 34 isolates.
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Affiliation(s)
- T Menon
- Department of Microbiology, Dr ALM PGIBMS, University of Madras, Chennai, India
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Chakrabarti R, Vikramadithyan RK, Dileepkumar T, Kumar KB, Kumar MP, Misra P, Rao PB, Lohray VB, Lohray BB, Rajagopalan R. Studies on the euglycemic and hypolipidemic potentials of the novel indole analogue of thiazolidinedione, DRF 2189. Arzneimittelforschung 1999; 49:905-11. [PMID: 10604043 DOI: 10.1055/s-0031-1300525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Euglycemic and hypolipidemic activities of a novel indole analogue of thiazolidinedione, DRF 2189 (CAS 172647-53-9), have been evaluated in different animal models. Compared to troglitazone (CAS 97322-87-7), DRF 2189 exhibited interesting plasma glucose and triglyceride lowering activity in genetically diabetic and obese db/db mice. It also produced a significant reduction in plasma glucose, triglyceride, total cholesterol levels and improvement in oral glucose tolerance in another genetic mouse model, the ob/ob mice. In high-fat diet fed Sprague-Dawley rats, DRF 2189 treatment showed improvement in plasma lipid parameters. Like other thiazolidinediones, this compound also possesses peroxisome proliferator activated receptor gamma (PPAR gamma) transactivation potential. In anaesthetized rat experiment, DRF 2189 produced a transient fall in blood pressure without any change in the ECG pattern. It showed non-specific smooth muscle relaxant activity against acetylcholine, histamine and potassium chloride induced contractions in isolated guinea pig ileum. A twenty-eight-day toxicity study in Wistar rats did not show any signs of treatment related adverse effects. The overall antidiabetic and hypolipidemic activities of DRF 2189 are comparable with rosiglitazone (CAS 155141-29-0) and superior to troglitazone. In conclusion, results from these preclinical studies indicate that DRF 2189, a novel thiazolidinedione, has a marked potential for the management of type-2 diabetes.
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Affiliation(s)
- R Chakrabarti
- Department of Pharmacology, Dr. Reddy's Research Foundation, Hyderabad, India
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Kumar MP, Bhaskar L, Thampan RV. Structural characterization of the goat uterine estrogen receptor activation factor using an endogenous calcium activated neutral protease. Mol Cell Endocrinol 1999; 152:57-64. [PMID: 10432223 DOI: 10.1016/s0303-7207(99)00052-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
An expedient method for the purification of a calcium activated neutral protease (CANP) of the goat uterus has been designed. This enzyme, purified to homogeneity, has been used as a tool in the structural characterization of the estrogen receptor activation factor II (E-RAF II) that dimerizes with an alternative form of estrogen receptor (ER), the non-activated estrogen receptor (naER). The enzyme cleaves the E-RAF into two fragments, alpha and beta, of molecular mass 32 and 30 kDa, respectively. The beta retains the DNA binding activity, as well as the capacity to dimerize with the naER. On the other hand, the cholesterol binding activity and the ATPase function are shared by both alpha and beta fragments. The E-RAF domain that binds to the nuclear periphery appears to be localized on the beta fragment. The beta fragment, however, is incapable of entering the nucleus on its own.
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Affiliation(s)
- M P Kumar
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, India
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Kumar MP, Thampan RV. Dual hormonal involvement in the regulation of rat uterine collagenase activity. Biochem Int 1992; 28:975-80. [PMID: 1290469] [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: 12/26/2022]
Abstract
Hormonal control of rat uterine collagenase activities which use collagen types I, III, and V as the substrates has been studied. The collagenases are shown to be regulated in general by estradiol as well as by progesterone. However, the enzyme activity that uses type III collagen as the substrate appears to have a preferential response to progesterone over estradiol.
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Affiliation(s)
- M P Kumar
- School of Life Sciences, University of Hyderabad, India
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