A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Samanta, T. K.
- Detection and Characterization of Pathogenic Pseudomonas aeruginosa from Bovine Subclinical Mastitis in West Bengal, India
Authors
1 Department of Veterinary Microbiology, West Bengal University of Animal and Fishery Sciences, Kolkata, West Bengal, IN
2 Avian Influenza Laboratory, Institute of Animal Health & Veterinary Biologicals (R&T), Government of West Bengal, Kolkata, West Bengal, IN
3 Department of Veterinary Public Health, West Bengal University of Animal and Fishery Sciences, Kolkata, West Bengal, IN
Source
Veterinary World, Vol 10, No 7 (2017), Pagination: 738-742Abstract
Aim: Subclinical mastitis in bovines is mainly responsible for the huge economic loss of the dairy farmers, of which Pseudomonas aeruginosa is one of the causative agents. The study was aimed at a screening of suspected milk samples from different cattle farms of West Bengal for detection and confirmation of P. aeruginosa strains followed by their characterization.
Materials and Methods: Around 422 milk samples were screened from different dairy farms primarily by on-spot bromothymol blue (BTB) test and then in the lab by somatic cell counts (SCC) to finally consider 352 samples for detection of P. aeruginosa. Selective isolation and confirmation of the isolates were done using selective media, viz., cetrimide and Pseudomonas agar followed by confirmation by fluorescent technique. Molecular characterization of the strains was done by polymerase chain reaction for the presence of toxA (enterotoxin A, 352 bp) and exoS (exoenzyme S, 504 bp) genes.
Results: Approximately, 371 (87.9%) samples were positive in on-spot BTB test among which 352 (94.8%) samples revealed high SCC values (more than 3 lakh cells/ml) showing infection when screened. Among these, 23 (6.5%) samples yielded typical Pseudomonas sp. isolates out of which only 19 (5.4%) isolates were confirmed to be P. aeruginosa which showed characteristic blue-green fluorescence due to the presence of pigment pyoverdin under ultraviolet light. Out of these 19 isolates, 11 isolates were positive for toxA, 6 isolates for exoS, and 2 for both these pathogenic genes.
Conclusion: Approximately, 5.4% cases of bovine subclinical mastitis infections in South Bengal were associated with P. aeruginosa which possess pathogenic genes such as toxA (63.2%) and exoS (36.8%).
Keywords
Bovines, Characterization, exoS, Pseudomonas aeruginosa, Subclinical Mastitis, toxBovines, Characterization, exoS, Pseudomonas aeruginosa, Subclinical Mastitis, toxAA.- Generalized Fusion Frame in A Tensor Product of Hilbert Space
Authors
1 Department of Pure Mathematics, University of Calcutta, Kolkata, 700019, IN
2 Department of Mathematics, Uluberia College, Uluberia, Howrah, 711315, IN
Source
The Journal of the Indian Mathematical Society, Vol 89, No 1-2 (2022), Pagination: 58–71Abstract
Generalized fusion frames and some of their properties in a tensor product of Hilbert spaces are studied. Also, the canonical dual g-fusion frame in a tensor product of Hilbert spaces is considered. The frame operator for a pair of g-fusion Bessel sequences in a tensor product of Hilbert spaces is presented.
Keywords
Frame, Fusion Frame, G-Frame, G-Fusion Frame, Frame Operator, Tensor Product of Hilbert Spaces, Tensor Product of Frames.References
- M. S. Asgari and A. Khosravi, Frames and bases of subspaces in Hilbert spaces, J. Math. Anal. Appl., 308 (2005) 541–553.
- P. Casazza and G. Kutyniok, Frames of subspaces, Cotemporary Math., AMS 345 (2004), 87–114.
- O. Christensen, An Introduction to Frames and Riesz Bases, Birkhauser, 2008.
- R. J. Duffin and A. C. Schaeffer, A class of nonharmonic Fourier series, Trans. Amer. Math. Soc., 72, (1952), 341–366.
- G. B. Folland, A Course in Abstract Harmonic Analysis, CRC Press BOCA Raton, Florida, 1995.
- P. Gavruta, On the duality of fusion frames, J. Math. Anal. Appl. 333 (2007), 871–879.
- P. Ghosh and T. K. Samanta, Stability of dual g-fusion frame in Hilbert spaces, Methods Funct. Anal. Topology, 26 (3) (2020), 227–240.
- P. Ghosh and T. K. Samanta, Generalized atomic subspaces for operators in Hilbert spaces, Math. Bohem., (Accepted), DOI: 10.21136/MB.2021.0130-20
- P. Ghosh and T. K. Samanta, Fusion frame and its alternative dual in tensor product of Hilbert spaces, arXiv:2105.03094.
- Amir Khoravi and M. S. Asgari, Frames and Bases in Tensor Product of Hilbert spaces, Intern. Math. J., 4(6), (2003), 527–537.
- Amir Khosravi and M. Mirzaee Azandaryani, Fusion frames and g-frames in tensor product and direct sum of Hilbert spaces, Appl. Anal. Discrete Math., 6 (2012), 287–303.
- S. Rabinson, Hilbert space and tensor products, Lecture notes, September 8, 1997.
- V. Sadri, Gh. Rahimlou, R. Ahmadi and R. Zarghami Farfar, Generalized Fusion Frames in Hilbert Spaces, arXiv: 1806.03598v1, Submitted (2018).
- W. Sun, G-frames and G-Riesz bases, J. Math. Anal. Appl. 322 (1) (2006), 437–452.
- G. Upender Reddy, N. Gopal Reddy and B. Krishna Reddy, Frame operator and Hilbert- Schmidt operator in tensor product of Hilbert spaces, J. Dynamical Systems and Geometric Theories, 7(1) (2009), 61–70.