House finds Cuddy and Wilson already hovering over his former patient to check for spinal lesions, which House scoffs at, since he's already brilliantly deduced what's wrong with Melinda and there's no need for anyone to do anything else now. He takes the breathing tube out of Melinda's mouth while Cuddy stands there staring in horror but not actually doing anything to stop him. As usual. House asks Melinda if she's eaten anything she wasn't supposed to lately, specifically something that came from a can that was previously featured in the clearance aisle of the Five Cent Store. Of course, we all know that the botulism is also a red herring here, since Stacy has obviously injected all botulism in the state of New Jersey into her forehead to achieve that perfect wrinkle- and emotion-free face. But House continues to ask Melinda about her diet, wondering if her boyfriend brought some treats over when he visited her that night to have sex. "Surprise!" House sing-songs to the shocked parents standing nearby. Melinda denies it, but he keeps asking, listing off a variety of sexy edible products that could have gotten her sick. But when she hears that they explained away her anaphylaxis with the penicillin sperm, she informs them that Dan didn't have any penicillin in his sperm after all; Dan had taken a non-penicillin antibiotic, which Melinda somehow knows because I guess she's super-tight with Dan's friend's dad. This means that they have three symptoms after all -- heart failure, paralysis, and the anaphylactic shock. They must be connected...and Cameron's throwaway suggestion of tick paralysis is the only thing that fits. Well, well, well!
Melinda confirms that Dan would have walked through tall grass when he came to her window, and House, after being so sure three seconds ago that his patient had botulism, announces that they're looking for a tick now. He goes over all the likely tick areas looking for the tick that must have been transferred from Dan's pant leg onto Michelle's body, but he finds nothing except some dandruff. Great; call out the poor girl's dry scalp problems, too. It's not like she doesn't have anything else to worry about. Then Melinda's heart rate starts falling, and Cuddy pronounces the "magical tick hunt" over. House optimistically says that Melinda will be dead within the hour no matter what Cuddy does to save her heart, unless House can find and remove that tick. The parents consider that House could be right, but they still won't assent to letting him take over for Cuddy, who asks Wilson to chip in and help her out before her patient dies. He simply says that the dopamine they're giving Melinda for her falling BP won't be enough, and that they'll need to bring her up to the ICU for some other drug with a long-ass name. House and Wilson exchange looks.