How do bacteria and viruses differ in their type of nucleic acids

Bacteria contain DNA while some Virus contains RNA those are called retrovirus.
DNA will be double stranded in bacteria and single stranded DNA and RNA viruses are there

Bacteria: double-stranded circular DNA

Viruses: polyphyletic grouping of molecular parasitic entities that can use any of several different nucleic acid schemes including
single stranded DNA
double-stranded linear DNA
double-stranded circular DNA
single-stranded RNA
double-stranded RNA