Your best chances are within the first 24 hours after ovulation, but there is still a small chance two days after. So, honestly, if your ovulation really did occur on the 18th then your chances aren't that great because you would be past that 24 hour window, but I wouldn't say its impossible.
Cryptosporidiosis. Cryptosporidiosis is a parasitic disease that affects quail, pheasants, peafowl, waterfowl, chickens, turkeys, finches and psittacines (such as parrots). Cryptosporidia are poorly host-specific and can affect other animal species including humans, other mammals,...
Diseases that can pass from animals to humans are called zoonotic diseases. A biggie is Salmonella sp., a bacterium that can infect any species of reptile-or other animal, for that matter. While some Salmonella bacteria are found commonly in certain species, they can pass to other types of animals.