If a cat hisses at and scratches you it could mean many things. The cat could simply not like you. It could be angry or be scared. Often a cat or kitten who is feeling threatened will hiss and scratch in an attempt to defend itself. A kitten could also be over stimulated and warning you that it can't take anymore play.
I would advise leaving the kitten alone until it calms down and then approach it gently and calmly before petting it.
hisses or explodes
It is unlikely for an adult to contract scratch fever. You can catch cat scratch fever by getting scratched bitten by a kitten, but this is very uncommon. Getting scratched by a kitten does not automatically mean you have scratch fever.
cat scratch fever
It doesn't like you then.
Nothing
to get warm and settled in to sleep
No, they're mild fighting or playing. The kitten may yelp or get a scratch, but it'll be fine.
Right after surgery, most cats are feeling pain and nausea associated with the anesthesia and procedure. The kitten is hissing because it is warning its mother that it wants to be left alone.
Is your cat(the older one) a male? If so he is doing this because of jealousy and/or spite. Male cats do not usually attack kittens. Just like people the kitten(child) may have done something to upset the cat making it hiss. Then later the cat forges the kitten for whatever it is the kitten may have done, hence the nicer show of behaviours.
i meant to say is it bad if my cat hisses at me or no
Only if the kitten actually has rabies and you receive a bite or a scratch from it. Any animal or human with rabies is capable of transferring it to another living being.
Cats are not pack animals, they only tolerate each other in our homes because we feed them. You older cat sees the kitten as invading it territory.