Kitten may have FIP

Took my beautiful male siamese to be foxed on monday. He started acting weird and i noticed he may have an infection. Took him to the vet today where is temp was 106. Normal temp for a cat is 102.8 i guess it was dangerously high. They gave him an injection for antibotics and iv fiulds. But the vet told me he is showing signs on a rare disease. That is fatal. Called
Feline Infectious Peritonitis. He having me update him over the weekend and bring him back monday. He was sent home woth antibotics is hope that it is just an infection but states he hadnt seen a fever like that in a long time. Has anyone came across this disease or have an insight? If his fever goes up agian i have to bath him in cold water or take him to the pet ER. He is just 5 months. Im so upset.

I haven't dealt with it personally but it shows up here on a pretty regular basis.  http://www.vet.cornell.edu/fhc/Health_Information/brochure_ftp.cfm    You can also do a search here on FIP and it will bring up a number of threads.  It is difficult to diagnose, in fact the only way to get a 100 percent diagnoses is through necropsy.  There are blood test results that are a strong indicator, those coupled with clinical signs are how a highly probable diagnoses is made.  If your kitten has what is called wet FIP it will become obvious with fluid buildup in the belly.  I hope your kitty doesn't have this.  It is a horrible disease and nothing can be done to protect a cat from it.

The good news his tempature finally went down to normal and he started playing again so i am hoping it was just a terrible infection.

Glad to hear his temperature went down to normal and he is playing again.  We lost a young cat to FIP before and to echo what Denice said, it is indeed a horrible disease.

What I want to know is, how long after the antibiotic was started did his fever go down?

This is a very good way to know if FIP might be ruled out.

After taking him the vet at around 4 pm on friday and was told he may have FIP. He was given a shot of antibotics them. And then i continued to give him his antibotics every 8 hours and try to keep his fever down. It broke at 11pm that same night. And since them his fever has stayed normal. He is still acting not himself but he is doing better.

missautumn73 said:

After taking him the vet at around 4 pm on friday and was told he may have FIP. He was given a shot of antibotics them. And then i continued to give him his antibotics every 8 hours and try to keep his fever down. It broke at 11pm that same night. And since them his fever has stayed normal. He is still acting not himself but he is doing better.

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Why I asked this is because fever from FIP will not respond to antibiotics. 

It sounds to me that his fever did respond, fairly fast due to the injection.

What did they say about why they suspect FIP?

Try to remember all of it.