It is disappointing that DMart Premia products found to be with bacterial contamination.
The key issue is likely poor adherence to storage chain protocols and unhygienic handling at the local packaging.
SIDE NOTE
The same issue is found with most packet milk pouches. Though pasteurised, the milk is then transferred to be packaged locally, where unhygienic handling lead to microbial contamination.
We switched to UHT processed (much higher temperature processing than pasteurisation) tetra pack milk (packaged at the milk processing plant itself) since this issue is mostly avoided.
DMart should tighten their packaging process to avoid this issue.