TSI test determines whether a gram-negative rod utilizes glucose, and lactose or sucrose fermentatively and forms hydrogen sulfide.
Bacteria can be grown in an artificial medium in the laboratory. Growth medium can be broth, agar or biphasic. Medica can be categorized based on functions.
Selective (against gram-positive bacteria) and differential culture medium (LF and NLF), commonly used for the isolation of enterics.
Gram-positive bacteria retain the crystal violet-iodine complex and stain purple, whereas gram-negative bacteria stain pink.
Blood agar is an enriched medium which supports growth of gram-positive cocci and differentiates them on the basis of hemolysis (α, β, or γ).
Catalase test is used to distinguish among Gram-positive cocci. Staphylococci are catalase-positive but Streptococci are catalase-negative.
Aflatoxins are a group of 16 structurally related mycotoxins. Aflatoxin testing is done using various analytical methods.
Glass pipettes are one of the liquid handling instruments carrying utmost significance due to their precision.
Bacteria is a unicellular prokaryotic organism. The structure of bacteria consists of cell wall, plasma membrane, capsule, flagella, spores.
The mechanism of action of antiviral drugs is inactivating viruses, usually by inhibiting different stages of viral replication.
Mold belongs to the kingdom of Fungi or Mycota and is a multicellular eukaryotic microorganism. Mold growth in home is common occurrence.
Most bacterial size range from 0-2 to 2.0 μm in diameter and 2 to 8 μm in length. The ubiquitous Escherichia coli is about 1 μm in diameter and 1-2 μm long.
