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Anusuya, S.
- Bacteriophage Based Pathogen Reduction in Sewage Sludge
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Authors
P. Dhevagi
1,
S. Anusuya
1
Affiliations
1 Department of Environmental Sciences, Natural Resources Management, Tamil Nadu Agricultural University, Coimbatore, T. N., IN
1 Department of Environmental Sciences, Natural Resources Management, Tamil Nadu Agricultural University, Coimbatore, T. N., IN
Source
Nature Environment and Pollution Technology, Vol 12, No 1 (2013), Pagination: 7-16Abstract
Biological hazard in water resources in the form of pathogenic organisms are responsible for major outbreak in most of the developing countries. The goal which gains momentum is removal of pathogens. Every effort leading to reduction in sewage pollution and pathogenic microbes has to be promoted and implemented. This necessitates to search for novel approaches that does not harm the environment. One such novel approach is exploring the possibilities of bacteriophages for pathogen removal. Sewage sludge samples were collected from different locations of Tamil Nadu and analysed. The pH of the sludge samples varied from 6.26 to 8.23 and alkaline pH was observed in Coovum sample. Highest EC was recorded by Vellore sample (4.62 dSm-1). The total heterotroph population ranged from 11 × 106 to 24 × 1014/kg of dewatered sludge. Higher frequency of antibiotic resistant E. coli, Pseudomonas sp., Streptococcus sp. and Bacillus spp. were observed in all the places, which clearly indicated the extent of pollution. E. coli and Salmonella typhi showed resistance to almost all the antibiotics and intermediate resistance to 3 antibiotics. None of the sewage sludge samples had phages against MTCC culture. Phage treatment resulted in 100 % removal of S. typhi from sewage sludge.Keywords
Pathogen Reduction, Bacteriophage, Sewage Sludge.Full Text
- Prevalence, Symptomatology, Pathogenicity and Nutritional Requirements of Fusarium oxysporum f.sp.phaseoli Causing Fusarium Yellows of French Bean in Thandikudi
Abstract Views :273 |
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Authors
Affiliations
1 Department of Plant Pathology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Department of Horticulture, Agricultural College and Research Institute, Madurai (T.N.), IN
1 Department of Plant Pathology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Department of Horticulture, Agricultural College and Research Institute, Madurai (T.N.), IN
Source
International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 161-166Abstract
Fusarium yellows/wilt caused by Fusarium oxysporum f.sp.phaseoli are one of the serious diseases in French bean in Thandikudi and Kodaikanal hills of Dindugal district was found to prevalent in all French beans growing areas under survey with maximum of 71.25 per cent incidence and 65.88 per cent disease severity at Thandikudi village of Dindugal district in Tamil Nadu. The pathogenicity test was conducted by artificial inoculation of test fungus into the young two leaf stage of French bean and the typical symptom were produced after twelve days after inoculation. Among the different solid and liquid media tested oat meal agar potato dextrose agar medium supported growth of the casual fungus. Fungus could grow well at a pH 4.0 and 5.0, respectively. This pathogenic fungus grew maximum when basal medium was supplemented with lactose and dextrose as carbon sources showed maximum growth and with potassium nitrate and sodium nitrate as nitrogen sources.Keywords
Fusarium oxysporum f.sp.phaseoli, Pathogenecity, Thandikudi, Symptoms.
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