ImmuCell Corporation, a biotechnology company, engages in the development and manufacture of diagnostic tests and products for therapeutic and preventive use against infectious diseases in animals and humans. It offers First Defense, an orally delivered scours preventive product that is manufactured from cows' colostrum using proprietary vaccine and milk protein purification technologies. The company also sells products that aid in the management of inflammation of the mammary gland caused by bacterial infections, including Wipe Out Dairy Wipes, a natural antibacterial peptide that consists of pre-moistened towelettes that are impregnated with Nisin to prepare the teat area of a cow in advance of milking; MASTiK, a mastitis antibiotic susceptibility test kit; California Mastitis Test, which is performed at cow-side for early detection of mastitis, as well as for bulk tank and individual cow sample monitoring, and for determining the quarter of the udder that is mastitic; and Rapid Johne's Test, which identifies cattle with symptomatic Johne's disease in a herd. In addition, ImmuCell develops Mast Out, an intramammary infusion product containing Nisin that is used in the treatment of mastitis in lactating dairy cows. It sells and distributes its products directly, as well as through veterinarian distributors to various veterinarians and producers in the dairy and beef industries in the United States and internationally. The company was founded in 1982 and is based in Portland, Maine.