Laboratory staff can then view the samples using digital images and establish which antibiotic will be effective within a shorter time frame.
It also has the country's longest Lamson system - pneumatic air tube systems that whiz samples from various wards 500m under the ground straight to the laboratory.
Pathlab pathologist and director Richard Massey said the new building had been a slow project which turned into a sprint for the finish.
"For some people, those who have been working for Pathlab for a long time, a new lab has been promised on this campus for 40 years and we've finally managed it.
"It took a shared vision and a partnership to bring this about."
Dr Massey said he was proud of the new set up, particularly the new specialist microbiology system which was world leading and a first in Australasia.
Tauranga MP Simon Bridges said the new building was magnificently stunning and it was a symbol of what Pathlab represented - innovation, quality and fantastic service.
Mr Bridges said the Tauranga Hospital campus now had two public-private partnership facilities on site. He was not aware of anything like this within the district health board system, which made Tauranga "a real leader".
"What excited me so much about this is it means better services for the people in this area. I do believe we have the best primary health care in New Zealand, we've got a fantastic hospital."
Pathlab - Key facts
• $20m building including fit-out but not specialist equipment.
• 5500sq m of which 3000sq m houses specialist laboratory.
• Contains Lamson pneumatic tube transport system. The longest in NZ at 500m
• Kiestra Microbiology Automation system, largest system in Australasia and first in New Zealand.
• Patient collection facility opens Monday at 7.30am.
• 192 scientific and technical staff.
• 12 local pathologists.
• 1800 patient episodes daily.
• 24/7 support to Tauranga Hospital.
