Previous studies have linked the C. perfringens beta-2 toxin (cpb2) identified in CZA birds with enteritis in psittacines [33], storks [70], pigs [71], and poultry [72]; however, the cpb2 toxin has also been identified in healthy individuals (poultry, horses, dogs, and other avian species) and its role enteritis is not clear [73–77]. The gene discussed is CPB2; the disease is enteritis.