Neisseria strain transport

[Luís Távora Tavira]

Dear readers:

We are working with Neisseria gonorrhoeae strains from Guinea-Bissau for
the past 2 years and having lots of problems with preservation at our
african lab (only -20 º C) and transportation to Lisbon.In fact, none of
the methods we used so far gave a result better than 60% of recovery.

Any help on the subject would be great...(15% improvement would be nice  
:-)

I thank you in advance 
-- 
Luís Távora Tavira
Intitute of Tropical Medicine
Lisbon - Portugal