Mum & Dad visit!

Mum & Dad were out for a long time recently, over three weeks!
We had a good time, went to Lusaka and stayed at the Chisamba Safari Lodge, always a pleasure.
Also went out for loads of meals, did lots of gym, swimming, sunning, talking non stop (of course), had both our wedding anniversaries (!!!) and generally a great time.......
until Justin got 'giardia'......"AAAAAAARGHG! WHAT THE HELL'S GIARDIA?" I hear you scream!
Well, Justin is now the expert (wouldn't you be if you found you had little nasty things living in your gut?!)
Anyway, it's like this..... apparently it's rampant all over the Copperbelt, so we're told by anyone we mention it to, and is a waterborne parasite, picked up from water contaminated by wildlife.............EEEEEK! Could it have been from our dead snake in the well? Seems likely but then again I've been fine and how would thousands (?) of people on the Copperbelt have got it then?
Long and short of it is...Justin took the pills, I took the pills (as precaution) and now our night guard appears to have it so he's on the pills and now our other two staff are also on the pills as a precaution.
So there you have it, but for the record, you need a 5 day course of metronidazole - 30 tablets 200mg - take 2 every 8 hours.
If that doesn't kill it (and it didn't Justin's) then take Tinidazole 2grm - 4 x 500mg tabs in one go and they should be well and truly dead and buried.