Help! Whats wrong with these shrimp?

Hi! A few hours I bought 12 ghost shrimp for my 15g, and they’re currently drip acclimating. On a couple of them I noticed these weird red patches, and those shrimp are also less responsive. Google says it might be “rust-spot disease”? I’m looking for a second opinion and any advice! Should I separate these shrimp? I have no other shrimp in my tank, just fish and snails. Should I be worried about it affecting the other tank inhabitants if any of the other shrimp have it?

Sorry for the low photo quality

Looks like it. You'll need levamisole, dose it 1 mL per 7 liters of water