if i want to ship TB positive isolates from one country to other, what kind of shipment it should be? dry-ice shipment or ambient shipment by FedEx or shipment using ice pack?
You could use any mentioned methods. Usually we send the samples by DHL on dry-ice. If you have a good quality and purified samples (DNAse and RNAse free) you could send it without any conditions.
For sure you have to follow IATA Guidelines. Make sure that if you are transporting isolates of a bacteria or mycobacterium , you will need to pack it according to guidelines for standard precaution - Biological Dangerous Category "A"
We have used World courier company (http://www.worldcourier.com)
M. tuberculoisis isolates can be shipped abroad, preferably on solid media, because liquid media can leak. They must be packaged according to the IATA guideline, and shipped as Categorie A, UN2814. clearly identified a Biological dangerous.
Be sur that the receiver lab hold also the permit to handle those siolates that are classified as risque group 3.