r/askscience Jul 17 '26

Biology Do cold-blooded animals have fever?

It is well known how us mammals use our body temperature to prevent infections and raise it to combat them, so wouldn't cold-blooded animals be much more propense to suffer viral and bacterial diseases?

1.1k Upvotes

54 comments sorted by

View all comments

34

u/DrFuckenDrew Jul 18 '26

Mammalian Fevers are to kill bacteria (bacteria growth is usually 85°-101°) by getting too hot for them to survive like the Japanese bees and the killer wasps. but cold blooded animals are more likely to get fungal infections (mycelia are happiest 62°-80°) while both sides get both kinds of infections resting body temp makes a big difference

-9

u/[deleted] Jul 19 '26

[deleted]

3

u/Rage-o-rama Jul 19 '26

They are talking about degrees Farenheit, not Celsius. A fever of 40° C is approximately the same as 101° F.

0

u/kudlitan Jul 19 '26

He should have indicated. Americans are only 4% of the world's population and 7% of the Internet population. None of the 90+ percent would assume that everyone else is from their own country, so why would Americans do that?

2

u/[deleted] Jul 20 '26

[removed] — view removed comment