Cryptosporidium... Crypto+Rota is the worst to deal with. Since 3 years i have to deal with this problem. There is one treatment in Europe. Intervet's product. Halocur. I don't know if it's avalable in US. I save my calf this way. I don't know if you can find this med...maybe on online pharm or maybe you know somebody who knows somebody...First 3 cc of Trimidox for 3 days, 2 pill of Zitromax the first day and one pill a day for the next 3 days. If the calf don't react to zithromax, give them Biaxin, one pill each 12 hours and stop zithromax. If the calf become weak, give IV electrolyte. That is the only way I found to save them and this way I save them. Vaccinate your cows for rota, corona and Ecoli. Watch very close your calf at the 5-6-7 days.
Zithromax and Biaxin = human med.
If somebody know another way to save them, please tell me.
Marcel