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A buccal swab, also known as buccal smear, is a way to collect DNA from the cells on the inside of a person's cheek. Buccal swabs are a relatively non-invasive way to collect DNA samples for testing .
The cheek is the most common location from which a DNA sample can be taken. (Some saliva is collected from inside the mouth, e.g. using a cotton-tipped rod called a swab or "Q-Tip". The procedure of collecting a sample in that way is typically called a "cheek swab".)
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Phase contrast microscopy of clue cells in a vaginal swab A pH indicator to detect vaginal alkalinization (here showing approximately pH 8), and a microscope slide to microscopically detect clue cells Gram stain of cells from the vagina (the same magnification) with normal bacterial flora (top) and the bacteria that cause vaginosis (bottom).
Compound verbs, a highly visible feature of Hindi–Urdu grammar, consist of a verbal stem plus a light verb. The light verb (also called "subsidiary", "explicator verb", and "vector" [ 55 ] ) loses its own independent meaning and instead "lends a certain shade of meaning" [ 56 ] to the main or stem verb, which "comprises the lexical core of ...
The DNA is collected using a buccal swab, which is a brush inside of the cheek. The DNA from the cheek cells in the swab is replicated, is given a restriction enzyme digest, and is electrophoresed. Electrophoresis separates DNA segments by their size, and different people have unique sizes of segments of DNA because of variations in the DNA ...
A clean swab will be rubbed over the back of the throat, around the tonsils, and over any red areas or sores to collect a sample. The sample may also be collected using a throat washout. For this test, the patient will gargle a small amount of salt water and then spit the fluid into a clean cup.
Gram stain of Candida albicans from a vaginal swab. The small oval chlamydospores are 2–4 μm in diameter. Gram staining is a bacteriological laboratory technique [ 8 ] used to differentiate bacterial species into two large groups ( gram-positive and gram-negative ) based on the physical properties of their cell walls .