Identify one common method used for microbiological sampling in body fluids.

Swabbing or aspiration is a common method used for microbiological sampling in body fluids because it allows for the collection of specimens directly from the area of interest. This technique is particularly useful when samples need to be obtained from surfaces or lesions where microorganisms may be present.

Swabbing involves the use of a sterile swab to collect material from mucous membranes or other surfaces, while aspiration utilizes a syringe or similar device to draw fluid directly from a body cavity or area that may contain pathogens. These methods ensure that the samples collected are representative of the microbial population present and are crucial for accurate diagnosis and study of infections.

In contrast, while filtration through membranes, centrifugation of samples, and heat sterilization are important laboratory techniques, they are not typically used for the initial sampling of body fluids. Filtration is more relevant for separating microorganisms from liquids after a sample has been collected. Centrifugation is mainly for separating components of a sample based on density, while heat sterilization is used for decontamination rather than sampling.