Effervescent compositions and uses thereof

A method of enriching the growth of a target microorganism, comprising:

• providing a culture medium, a sample that includes the target microorganism, and a latent effervescent body;
• wherein the latent effervescent body comprises an outer shell with a core composition disposed therein;
• wherein the core composition comprises two or more effervescent components and a selective agent that facilitates the growth of the target microorganism relative to growth of at least one microorganism other than the target microorganism;
• contacting the sample, the latent effervescent body, and the culture medium under aqueous conditions to facilitate growth of the target microorganism;
• allowing the target microorganism to grow over a time period of about 2 hours to about 6 hours;
• and
• releasing the selective agent from the latent effervescent body after a time period of about 2 hours to about 6 hours;
• wherein releasing the selective agent further comprises distributing the selective agent in the culture medium;
• wherein distributing the selective agent comprises distributing the selective agent via a mixing process resulting from gaseous effervescence;
• wherein releasing the selective agent comprises delaying the release of the selective agent for a predetermined time after the step of contacting the sample, the latent effervescent body, and the culture medium under aqueous conditions.