Shade
Monster Junkie
2d6 Con maybe? Or 2d4 if that seems too much.
If you agree on Dex vs Str, I'd just like to know what Cleon thinks.
I'm fine with either amount, Dex or Str, and finding out what Cleon thinks.

2d6 Con maybe? Or 2d4 if that seems too much.
If you agree on Dex vs Str, I'd just like to know what Cleon thinks.
That could work, though we're still tracking bites on the DC. How abot this?
Venom (Ex): A tatalla's bite injects a toxin that causes weakness and illness, and eventually, death. A victim of a tatalla's bite must succeed on a DC X Fortitude save or become sickened for 1d4 minutes. A victim who is already sickened (such as from a previous bite) instead suffers 1d6 points of Strength damage and must succeed on a DC X Fortitude save or become nauseated for 1d4 rounds. After the nausea passes, it must then succeed on another DC X Fortitude save or become sickened for 1d3 days. A victim who is already nauseated (such as from previous bites) suffers 1d6 points of Constitution damage and must succeed on a DC X Fortitude save or become sickend for an additional 1d3 days. The save DCs are Constitution-based. Recall that sickened creatures take a -2 penalty to saving throws; nauseated creatures take a -4 circumstance penalty to saves against tatalla venom. A delay poison or neutralize poison spell removes the effect from the sickened creature. Creatures with immunity to poison are unaffected, and creatures resistant to poison receive their normal bonus on their saving throws.
Some thoughts: not sure if the Con damage is strong enough, and I'd consider swapping the Str damage for Dex like in the original.
The problem is changing the types of conditions we're tracking from bite to bite. It just feels too much bookkeeping. And, besides, might not being sick from some other disease make you more vulnerable to the venom?
As for the other version, just imagine the tatalla giving 2 bites per night.
You know, I'm getting what I think is an acceptable idea as a compromise, but it's going to take me a little to figure it out. I'll try to get back to this tonight, since I need to go make dinner now.
Last night, baked pasta casserole. Tonight, dahl makhni.
See what you think, then we can settle on Str/Dex and any numbers.
Venom (Ex): A tatalla's bite injects a toxin that causes weakness and illness, and eventually, death. A victim of a tatalla's bite must succeed on a DC X Fortitude save or become sickened for 4d12 hours. A victim who is already sickened (such as from a previous bite) instead suffers 1d6 points of Strength damage and must succeed on a DC X Fortitude save or become nauseated for 1d4 rounds. After the nausea passes, it must then succeed on another DC X Fortitude save or contract tatalla wasting (see below). A victim who already suffers from tatalla wasting takes 2d6 points of Constitution damage as well as the penalties for being sickened. The save DCs are Constitution-based. Recall that sickened creatures have a -2 penalty on all saves. A delay poison or neutralize poison spell removes the effect from the sickened creature. Creatures with immunity to poison are unaffected, and creatures resistant to poison receive their normal bonus on their saving throws.
Tatalla wasting (Ex): disease - bite, Fortitude DC X, incubation period 1 minute; damage sickened for 1 day and an additional -2 circumstance penalty on saves against tatalla venom. The save DC is Constitution-based. While delay poison and neutralize poison may cure tatalla wasting just as remove disease and similar magic.