Seems like vanilla huskinfectionresistance is causing the issues.
It seems that when calyxanide and vanilla huskinfectionresistance is combined, the following happens:
1) husk infection will tick down past the 25% stop threshold (potentially all the way down to 0 and be cured),
2) the surgery minigame will repeatedly spawn a new husk parasite if the previous is removed with a hemostat,
3) the giveaffliction huskinfection command is inverted, making negative values grow the targets huskinfection instead of decreasing, and vice versa.

At least this is what it seems like is happening. In that case there are two way of avoiding this (probably bug right?):
1) never apply broad-spectrum antibiotics to someone with husk infection.
2) never apply calyxanide to someone with husk infection (at 100 medical skill, you can complete the entire surgery safely without calyxanide)

useless mod, its bugged...if u dont fix then gg...the husk still there when i finish the surgery and keep apearing always no matter what i do

When fix?

Did you fix the bug where ABX can still get rid of husk if it's 30-50% or lower

Опять таки бага не оказалось, просто надо сбавить степень заражения, прежде чем оперировать

Однако иногда возникает баг с тем, что при убийстве паразита он снова появляется. Чем это вызвано, выяснить пока не удалось

To prevent antibiotics from healing husk, put this mod above neurotrauma in the mod list

Отбой, поставил мод в списке выше обычной нейротравмы и всё заработало

Проверил, антибиотики лечат заражение паразитом с любого процента

also, in that fork, does it change antibiotics treatment to infection?

"- Husk symbiosis treating Neurotrauma afflictions, such as pneumothorax or respiratory arrest"

this line repeat twice.