Unfortunately there are now strains of TB that are resistant to most major antibiotics, making it's treatment especialy difficult. Some of this has come about via the bacillums natural ability to mutate and some has been brought about by careless overuse of antibiotics. It always was a sod to treat as the bacillus has a thick (in microbiological terms) waxy protectve coat, making it difficult for an antibiotic to penetrate.
Worse still there has been a noteable increase in TB in the UK in the last few years.
HPA | TB | Surveillance | TBIOS
If it's a serious problem here, what hope for the average Zimbabwean unlucky enough to get infected?