Colostrum vs. Pus — What's the Difference?

Colostrum (known colloquially as beestings, bisnings or first milk) is the first form of milk produced by the mammary glands of mammals (including humans) immediately following delivery of the newborn. Most species will begin to generate colostrum just prior to giving birth.

Pus is an exudate, typically white-yellow, yellow, or yellow-brown, formed at the site of inflammation during bacterial or fungal infection. An accumulation of pus in an enclosed tissue space is known as an abscess, whereas a visible collection of pus within or beneath the epidermis is known as a pustule, pimple or spot.

The thin yellowish fluid secreted by the mammary glands at the time of parturition that is rich in antibodies and minerals, and precedes the production of true milk. Also called foremilk.

A generally viscous, yellowish-white fluid formed in infected tissue, consisting of white blood cells, cellular debris, and necrotic tissue.

(medicine) A form of milk produced by the mammary glands in late pregnancy and the few days after giving birth. Human and bovine colostrum is thick and yellowish. In humans, it has high concentrations of nutrients and antibodies, but it is small in quantity.

A whitish-yellow or yellow substance composed primarily of dead white blood cells and dead pyogenic bacteria; normally found in regions of bacterial infection.

A mixture of turpentine and egg yolk, formerly used as an emulsion.

(rare) To emit pus.

The first milk secreted after delivery; biestings.

The yellowish white opaque creamy matter produced by the process of suppuration. It consists of innumerable white nucleated cells floating in a clear liquid.

Milky fluid secreted for the first day or two after parturition

The tenth month of the Hindu calendar

A fluid product of inflammation