What study should I pursue after B.Sc in microbiology?

You can do M.Sc. The master courses in this field are of two years. You can do: Master of Science in Microbiology Master of Science in Applied Microbiology Master of Science in Medical Microbiology Master of Science in Microbial Genetics and Bioinformatics Specializations in Microbiology Agricultura

M.Sc Microbiology is the best, but if you don't want to get this, there is so many options available for you, like M.Sc in Food Technology, M.Sc in genetics, Diploma in Medical Lab Technician (Recommended for quick job), M.Sc in environmental Science, M.Sc in Bioinformatics.

where are you from ?

You should opt for M.Sc in microbiology. Good luck.

You can do Master's Degree with your stream, but best option is to prepare for competitive.