"The infection increases the host's lactation rate, or if the host is not lactating causes it to begin doing so. It appears that any mammal is susceptible to infection regardless of gender. The initial symptoms of the disease have a rapid onset but are relatively minor: swelling of mammary gland tissue (causing breast development in males) and increased sensitivity of the nipples in both males and females. On average a human of either gender in this stage of the disease will produce between 0.5 and 1 liters of milk per day. If this milk is extracted on a regular basis, with milking intervals of no less than once every eight hours, the disease appears to remain stable indefinitely in this state. Milking can be performed with a standard breast pump.
If a host is not milked adequately, mammary glands continue to develop. Left unchecked, this development will diverge from normal human growth patterns: rather than remaining confined to a single pair of breasts, it will begin spreading down the front of the chest and abdomen. Additional pairs of nipples will develop along the way and the nipples will lengthen and thicken dramatically. The eventual result resembles an enormous fleshy udder stretching along the entire front of the torso, with between six and eight pairs of teats. A human at this stage can produce upwards of forty liters of milk per day. This is the maximum extent to which the disease will progress in humans.
The metabolic demands of such a large and productive glandular system are considerable and a human victim in this state will find him or herself preoccupied with eating most of the time. With his or her energy fully devoted to milk production the victim will often suffer from a general state of mental dullness and docility. Surgical removal of mammary tissue is a temporary measure as the disease is able to cause regrowth even if all of it is excised."