Comparison of Taxonomic Resolutions of Various Typing Methods for and Species Isolated from Landfill Leachate.

Anaerobic bacteria and methanogenic archaea at municipal landfill dumping sites play a vital role in the landfill ecology, waste degradation, global warming and climate change. Although landfill works as a cheap way of solid waste management, unmanaged landfill plays a significant role in spreading pollutants and pathogens in natural ecosystems. The genera and are important groups of anaerobic microbes from a public and environmental health perspective.

Culture-based and culture-independent approach for the study of the methanogens and obligate anaerobes from different landfill sites.

The landfill is a cheap way of solid waste management in developing countries. The majority of landfills are non-sanitary and work as open garbage dumping sites and pose threats to public and environmental health. Therefore, an in-depth understanding of the chemistry and microbiology of landfills is imperative to develop the right policies for landfill management.

A culture-based and culture-independent approach to the study of landfill leachate bacterial and archaeal communities.

The landfill is a convenient and affordable method of municipal solid waste (MSW) management. Landfill leachate contains a heavy load of pollutants and pathogens. Discharge of untreated leachate is the leading cause of surface and groundwater contamination and a threat to public and environmental health.

A Microcosm Model for the Study of Microbial Community Shift and Carbon Emission from Landfills.

Unlabelled: The landfill is an inexpensive way of municipal solid waste (MSW) management and contributes extensively to the total carbon budget and global climate change. Three landfills from two geographically distinct metro- cities of India were taken as model systems to create microcosms and study their physiochemistry, microbiology, and carbon emission. The microcosm experiments revealed that facultative anaerobic bacterial community showing the dominance in the beginning but with the progression of anoxia and anaerobic conditions, methanogenesis prevailed, resulting in a clear shift towards the abundance of methanogens especially the members of , and (70-90% of the total microbial population).

Spectrum of Orbital Cellulitis on Magnetic Resonance Imaging.

Introduction Orbital infection is an ophthalmological emergency as it can lead to blindness and intracranial spread. Imaging is needed to determine the extent of the infection, to localize an abscess, and for surgical planning. The role of magnetic resonance imaging (MRI) is well established in the evaluation of orbital pathologies, including orbital cellulitis and abscess, mainly due to its ability to evaluate early intracranial involvement.

Assessment of the Role of Wastewater Treatment Plant in Spread of Antibiotic Resistance and Bacterial Pathogens.

In current study, we performed a comparative study on bacterial load, total coliform counts and type of organisms present in pre- and post-treated wastewater samples from municipal wastewater treatment plant of Pune, India. In addition, we also studied the antibiotic resistance profiling and role of the selected treatment plant in spread of antibiotic resistance in the environment. Data showed that total 30 different bacterial species from 18-different genera were present in untreated wastewater while only 9 species from 6-different genera were present in post-treated effluent.

Enhanced n-butanol production by Clostridium beijerinckii MCMB 581 in presence of selected surfactant.

Extractive butanol fermentation with non-ionic surfactant, a recently explored area, has shown promising results with several advantages but is relatively less investigated. This work reports the extractive fermentation with selected non-ionic surfactants (L62 and L62D) to enhance butanol production using a high-butanol producing strain (Clostridium beijerinckii MCMB 581). Biocompatibility studies with both the surfactants showed growth.

A pmoA-based study reveals dominance of yet uncultured Type I methanotrophs in rhizospheres of an organically fertilized rice field in India.

Rice fields are one of the important sources of anthropogenic methane. Methanotrophs can oxidize up to 30 % of the produced methane and thus have a pivotal environmental role in methane mitigation. India occupies the largest region under rice cultivation; however, most of the studies done on methanotrophic communities have focused on the Northern region.

Deciphering Community Structure of Methanotrophs Dwelling in Rice Rhizospheres of an Indian Rice Field Using Cultivation and Cultivation-Independent Approaches.

Methanotrophs play a crucial role in filtering out methane from habitats, such as flooded rice fields. India has the largest area under rice cultivation in the world; however, to the best of our knowledge, methanotrophs have not been isolated and characterized from Indian rice fields. A cultivation strategy composing of a modified medium, longer incubation time, and serial dilutions in microtiter plates was used to cultivate methanotrophs from a rice rhizosphere sample from a flooded rice field in Western India.

Clostridium punense sp. nov., an obligate anaerobe isolated from healthy human faeces.

An obligately anaerobic, rod-shaped (0.5-1.0 × 2.

Draft genome sequence of Clostridium sulfidigenes 113A isolated from sub-seafloor sediments associated with methane hydrate deposits.

Clostridium sulfidigenes 113A is a strictly anaerobic, rod shaped, gram positive bacterium isolated from sub-seafloor sediments associated with methane hydrates. Here, we report the first draft genome of C. sulfidigenes strain 113A, which comprises 3,717,420 bp in 96 contigs with the G+C content of 30.

Draft genome sequence of Clostridium celerecrescens 152B isolated from sub-seafloor methane hydrate deposits.

Clostridium celerecrescens 152B is an obligate anaerobic, Gram positive rod shaped bacterium isolated from sub-seafloor methane hydrate sediments of Krishna Godavari basin, India. Here, we report the first draft genome sequence of C. celerecrescens 152B, which comprises 5,050,495bp in 92 contigs with the G+C content of 43.

Genome sequencing of multidrug resistant novel Clostridium sp. BL8 reveals its potential for pathogenicity.

Background: The human gut microbiome is important for maintaining the health status of the host. Clostridia are key members of the human gut microbiome, carrying out several important functions in the gut environment. Hence understanding the role of different Clostridium species isolated from human gut is essential.

Development of a microbial process for the recovery of petroleum oil from depleted reservoirs at 91-96°C.

A consortium of bacteria growing at 91°C and above (optimally at 96°C) was developed for the recovery of crude oil from declining/depleted oil reservoirs having temperature of more than 91°C. PCR-DGGE-Sequencing analysis of 16S rRNA gene fragments of NJS-4 consortium revealed the presence of four strains identified as members of the genus Clostridium. The metabolites produced by NJS-4 consortium included volatile fatty acids, organic acids, surfactants, exopolysaccarides and CO2, which reduced viscosity, emulsified crude oil and increased the pressure that facilitated displacement of emulsified oil towards the surface.

Comparative genome analysis of Megasphaera sp. reveals niche specialization and its potential role in the human gut.

With increasing number of novel bacteria being isolated from the human gut ecosystem, there is a greater need to study their role in the gut ecosystem and their effect on the host health. In the present study, we carried out in silico genome-wide analysis of two novel Megasphaera sp. isolates NM10 (DSM25563) and BL7 (DSM25562), isolated from feces of two healthy individuals and validated the key features by in vitro studies.

Changes in human gut flora with age: an Indian familial study.

Background: The gut micro flora plays vital role in health status of the host. The majority of microbes residing in the gut have a profound influence on human physiology and nutrition. Different human ethnic groups vary in genetic makeup as well as the environmental conditions they live in.

Molecular analysis of gut microbiota in obesity among Indian individuals.

Obesity is a consequence of a complex interplay between the host genome and the prevalent obesogenic factors among the modern communities. The role of gut microbiota in the pathogenesis of the disorder was recently discovered; however, 16S-rRNA-based surveys revealed compelling but community-specific data. Considering this, despite unique diets, dietary habits and an uprising trend in obesity, the Indian counterparts are poorly studied.

Investigation of methanogen population structure in biogas reactor by molecular characterization of methyl-coenzyme M reductase A (mcrA) genes.

The methanogen community in biogas reactor running on cattle dung was investigated in two different seasons; summer (April, 36 degrees C) and winter (December, 24 degrees C), in the year 2004 by a culture-independent approach. Community structure was determined by phylogenetic analyses of 343 and 278 mcrA clones belonging to summer and winter month libraries, respectively. In summer month's library, 41.

Novel methanotroph diversity evidenced by molecular characterization of particulate methane monooxygenase A (pmoA) genes in a biogas reactor.

The present study for the first time investigated the diversity of methanotrophs in a biogas reactor running on cattle dung by sequence analysis of the "functional" gene, particulate methane monooxygenase A (pmoA). Community structure was determined by operational taxonomic unit (OTU) phylogenetic analyses of 396 clones belonging to pmoA library. On the basis of 95% peptide identity, 396 inferred PmoA peptide sequences were clustered in 22 phylotypes.

Phylogenetic analysis of methanogenic enrichment cultures obtained from Lonar Lake in India: isolation of Methanocalculus sp. and Methanoculleus sp.

The diversity of methanogenic archaea in enrichment cultures established from the sediments of Lonar Lake (India), a soda lake having pH approximately 10, was investigated using 16S rDNA molecular phylogenetic approach. Methanogenic enrichment cultures were developed in a medium that simulated conditions of soda lake with three different substrates viz., H(2):CO(2), sodium acetate, and trimethylamine (TMA), at alkaline pH.

Molecular analyses of microbial diversity associated with the Lonar soda lake in India: an impact crater in a basalt area.

The prokaryotic diversity associated with an Indian soda lake (Lonar Crater Lake) located in a basaltic soil area was investigated using a culture-independent approach. Community DNA was extracted directly from four sediment samples obtained by coring to depths of 10-20 cm. Small subunit rRNA genes (16S rDNA) were amplified by PCR using primers specific to the domains Bacteria and Archaea.

Isolation and characterization of a new osmotolerant, non-virulent Klebsiella pneumoniae strain SAP for biosynthesis of succinic acid.

In the present study, isolation of anaerobic bacteria from 24 different eco-niches was carried out. A total number of 300 bacterial isolates, including 230 obligate and 70 facultative anaerobes were obtained using anaerobic techniques. All the isolates were initially screened for succinic acid production by Fluorescein test and TLC method.

Comparison of 16S rRNA gene sequences of genus Methanobrevibacter.

Background: The phylogeny of the genus Methanobrevibacter was established almost 25 years ago on the basis of the similarities of the 16S rRNA oligonucleotide catalogs. Since then, many 16S rRNA gene sequences of newly isolated strains or clones representing the genus Methanobrevibacter have been deposited. We tried to reorganize the 16S rRNA gene sequences of this genus and revise the taxonomic affiliation of the isolates and clones representing the genus Methanobrevibacter.