How soon does ringworm infection show symptoms?

My kitty and my family members have been exposed to a kitten with ringworm infection for 1 to 2 days, how long will my kitty and humans show symptoms if infected and what is the typical symtoms? Is itching a first sign? If my cat does not show symptoms, could it be possible she still is the carrier and can transmit to others? Do I need to treat a cat not showing symptoms? What is the best way to treat it?
Since ringworm is a fungus, it will spread at varying rates. More than likely though, your kitty would start to show signs within a week. Look for circular spots that look like dry skin, or reddish in color.
If you think that the fungus has indeed been transferred to your household, the first step is to control it. The vet is always an option, but the costs of "diagnosis" are pretty high. They test hairs from your pet to see if the fungus is detectable, and only then will they prescribe medication.

The symptoms in humans is normally itching first, then a dry patch of skin in a circular pattern, a bit harder to pick up in animals because of their fur, you normally can't tell if they have it until a patch of hair falls out. I've only had experience with it on horses, they rub on trees, fences etc to scratch themselves and the others can then catch from touching the fences, trees etc and it seems to stay on the trees for a very long time. I would say it is possible that your cat could be a carrier and it wouldnt hurt to treat it. I use a product called vetadine, its surposed to be watered down and used as a wash, it would'nt hurt to wash your cat with it! I hope it likes baths! But it actually works best dabbed on the area undiluted. I've used it on myself, its fantastic, put it on once or twice and ringworms are gone.It does specify on the bottle amimal treatment only, but it has never hurt me. you can get creams from the chemist but they dont work anywhere near as quickly as the vetadine.

i wouldnt be able to give you a specific time frame, but i do know that ringworm is a slow-growing fungus .. if i had to GUESS, i might say from a few days to a week.ringworm typically presents as a round reddened lesion, usually with crust and a raised outer edge. it is normally itchy. it people, this may be easier to see, while in animals .. you may not see it until the fur falls out.
cats are notorious for being asymptomatic carriers. it is absolutely possible for your cat to be a carrier and transmit ringworm to others .. but it is also possible for her NOT to be a carrier.
in school, i was taught that the vet can "comb" a cat's haircoat with a sterile toothbrush and send it out to the lab to see if there is any ringworm on the haircoat that has not obviously presented itself. i'll be honest, i've never seen a veterinarian do it, and i'm not sure how many vets do it, or if what i learned is even outdated (although i learned that last year).
there are medicated dips that can be done to treat ringworm. i'm unsure if it's necessary to do this since you don't mention your cat has any signs of ringworm.what i would do: give the vet a call, see if he/she thinks it is necessary to figure out if your cat is a carrier.
in the meantime, check yourself, family, and all pets in the home daily (ALL OVER) for suspicious lesions. also, be sure to use a disinfectant approved for killing ringworm on all areas the infected animal came in contact with if you haven't already.good luck, hope i helped.