twisted head pigeon, do he has Paratyphoid?

[joyful]

Hi, I need your advice on this:

It all started with trying to feed a pigeon with the wounded leg. Then a few more…than about 30 of them come to have meals.

This past weekend, there is a pigeon with twisted head, seeing him with great difficulty competing for food. I caught him and put in a big box.
Past two days, he is so quietly, never attempt to try. I saw him drinking water and eating seeds.
This evening, he suddenly making a lot of noise. I peeked in and saw ……..
I saw the pigeon unable to walk probably, his head is always twisted in an awkward position looking at me.

Is this pigeon has paratyphoid?
I panicking when I saw “The head twisting is a symptom of paratyphoid”
My questions are:
Do this pigeon has paratyphoid? What are other diseases I should consider?
What are the name of the medicine? How do I feed it to the pigeon?
I have another bird at home, I wonder if Paratyphoid is contagious to other birds?
How do this disease spread to other birds or to humans?
I am very worry; I do not want my healthy bird or my family to be caught in any disease.
If I want to sanitize my home, is there any cheap and effective remedy that is safe to birds?

Any advice or suggestion is very welcome.
Thank U for answering.