Isolation and characterization of vB_SenS_Ib_psk2 bacteriophage against drug-resistant Salmonella enterica serovar Kentucky.

Autor: Inbaraj S; Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India. sophiinbaraj@gmail.com.; ICAR-NRC Meat, Hyderabad, Telangana, 500092, India. sophiinbaraj@gmail.com., Agrawal RK; Food Microbiology Lab, Livestock Products Section, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India., Thomas P; Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India., Chaudhuri P; Division of Biological Products, ICAR-Indian Veterinary Research Institute, Uttar Pradesh, Bengaluru, Karnataka, 560024, India., Chaturvedi VK; Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India.
Jazyk: angličtina
Zdroj: Folia microbiologica [Folia Microbiol (Praha)] 2023 Oct; Vol. 68 (5), pp. 771-779. Date of Electronic Publication: 2023 Apr 19.
DOI: 10.1007/s12223-023-01052-0
Abstrakt: Salmonella enterica serovar Kentucky is one of the food-borne zoonotic pathogens which is isolated in high frequency from poultry meat in the recent decades and is known for its multidrug resistance. The current study was aimed to isolate and characterize a bacteriophage against S. enterica serovar Kentucky isolate, 5925, which showed resistance to at least seven antibiotics and to study its efficiency to decontaminate S. Kentucky from chicken skin. The bacteriophage against S. enterica serovar Kentucky was isolated and was named vB_SenS_Ib_psk2 representing the place, source, and host. Electron microscopy revealed that the phage possesses isometric head and contractile tail, indicative of Siphoviridae family. Molecular detection of major capsid protein E gene yielded 511 bp, and NCBI blast analysis revealed that the phage belonged to the genus chivirus. The optimum temperature and pH for phage survival and multiplication were found to be - 20 to 42 °C and 6-10, respectively. One-step growth curve experiment of vB_SenS_Ib_psk2 revealed a latent period of 20 min and burst size of 253 phages/bacterial cell. The host susceptibility studies revealed that 83% of MDR isolates of S. enterica were susceptible to vB_SenS_Ib_psk2. Artificial spiking studies on chicken skin revealed that high multiplicity of infection (MOI) of phages of 10 6 pfu/mL is required for significant reduction (p ≤ 0.01) of bacterial concentration (0.14 ± 0.04) after 24-h incubation at 8 °C compared to group 1 (2.55 ± 0.89 cfu/mL).
(© 2023. Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i.)
Databáze: MEDLINE
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