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Introduction Quorum sensing (QS) is a sophisticated cell-to-cell communication system used by bacteria to coordinate group behaviors based on the population density. It enables bacterial cells to communicate and synchronize their activities by detecting and responding to small signaling molecules called autoinducers. In quorum sensing, …
Introduction Biofilm refers to a complex community of microorganisms, such as bacteria, fungi, or algae, that adhere to surfaces and are encased within a self-produced matrix of extracellular polymeric substances (EPS). These microorganisms form a structured, organized, and protective community within the biofilm. Key points …
Introduction of XLD Agar XLD agar is a selective, differential, and indicator medium for the isolation of enteric pathogens. XLD stands for xylose lysine deoxycholate. It also supports the growth of more fastidious enteric organisms. XLD agar was developed by Taylor. It was specially designed to allow the …
Introduction of Mannitol salt agar (MSA) Mannitol Salt Agar (MSA) is a selective, differential, and indicator medium which is used to isolate and identify S. aureus from clinical and non-clinical specimens. Other Staphylococcus species and Micrococcus also grow on this medium. Selective is due to very high salt (7.5%) compared with other media. Gram-Positive Staphylococcus: …
Introduction of TCBS Agar Vibrio cholerae is the causative agent of cholera and Thiosulfate Citrate bile salts sucrose (TCBS) agar is a selective as well as differential culture medium used for selective isolation of this bacterium including its species from a variety of clinical and nonclinical specimens. TCBS agar …
Introduction of Dermatophyte Test Medium (DTM) Dermatophyte Test Medium (DTM) is a selective and differential medium recommended for the cultivation and isolation of pathogenic dermatophytes. The Dermatophytes are a distinct group of fungi that infect the hair, skin, and nails in humans producing a variety of …
Introduction of Potato Dextrose Agar (PDA) Potato Dextrose Agar ( PDA) is a fungal medium and its ingredients are clear from its name it contains potato ( vegetable), dextrose ( sugar), and agar ( solidifying agent). PDA is recommended for the isolation and enumeration of fungi …