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ImmuCell

Portland, Maine, United Statesimmucell.com ↗

Ownership: Private
Employees: ~75
Development stage: Commercial

Overview

ImmuCell’s First Defense® products are commercially available and provide immediate passive immunity to newborn calves against E. coli, coronavirus, and rotavirus using colostrum-derived antibodies[2][5]. The company’s lead pipeline candidate Re-Tain®, a purified nisin intramammary treatment for subclinical mastitis in dairy cows as an alternative to antibiotics, has completed major facility expansion and submitted its final technical sections to the FDA. As of June 2025 it remains under regulatory review with investigational use initiated but not yet fully approved[6][9].

Therapeutic areas: Infectious Diseases
Modalities: Live biotherapeutic product therapyProtein (colostrum-derived antibodies)Peptide (nisin)
Industry: Veterinary

Drug pipeline

2 assets

First Defense

Commercial

Indications: Calf scours, Bovine enteritis

1 more asset in the full pipeline.

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Partnerships

Contract manufacturing partners for drug substance/product facilities[9]; no major pharma partnerships disclosed.

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