"Damn!" he screams out as the infection spreads, doubling over and feeling weird as his whole body becomes hot, opening his mouth as he feels his face push out into what he can only assume is a muzzle, his fingers becoming short and fat with thick, black pads growing on them. He feels his chest pushing out painfully against the armor and yelps, stripping down quickly as his upper body bulks up, becoming more muscular as he legs shorten a bit, heels drawing up, forcing him to walk on his toes. His feet become thick and start to grow spotted, short fur as it also races across his whole body, watching as his feet become extra large paws with thick padding, feeling a tail push from his spine while his ears become pointed and move topside, his nose becoming cold and black, taking in a thousand scents at once. The last of the changes taking place as his hands become paw-like, covered also in short, bristly fur and feels something down below tucking up against his stomach, covered in it's new soft home, whimpering a bit as he is forced into the form of a beast-man now.
Blushing hotly as he is now naked, Andrew retrieves his sword and finds walking a bit easier than he'd imagined in his new form, feeling the cool soil beneath his soft, clawed toes, and whining a bit hoping and speaking in his now, squeaky 'yena voice, "I hope this all comes to an end with the slaying of the dragon".