complete MCA in 2009 and from 3 years. Purse PHD in computers in USA.

Education: MCA 2009

Work: 3 yr 6 mnths experince in IT

Willing to do Phd in computer science

please suggest me whether I am eligible for phd in USA and also information related to credits.

I have completed my MCA in 2009 and currently working in IT industry from 3 years. I want to purse my PHD in computer science in USA. Please suggest me for this and am I eligible for this in detail.

You are eligible. You need to take standardized tests like GRE and TOEFL as they are required for PhD Programs or even MS in US. Browse around few articles in Study in US section, you will get some idea on various aspects.