In need of some wound care advice, please

[DrBoogy]

Hello all,
It's my first post on here so please bare with me.

Today I fell off my motorcycle... in Vietnam (I know, I know).
No broken bones but lots of grazing and cuts, one of which required 6 stitches. I've had the wounds cleaned and stitched, been told to stay off my right leg (cut requiring stitches was on my right knee) and given various medicines to take - some of which seem a bit suspect, namely 'Cefixime' and 'Chymotripsin', which (I think) are antibiotics and into-inflamatories respectively.

Now, my one big concern is that neither I nor the doctor has been able to get all the dirt out of my wounds. The shallow grazes appear 'dirty' and there are some dark brown patches in the deeper ones. He scrubbed me pretty hard with saline/gauze, applied iodine, and I had another good go in the shower this evening. Nothing, the dirt either remains under the skin, almost like a tattoo, or buried deeper in tiny dots.

Can anyone recommend an appropriate course of action? I'll be as vigilant as possible with keeping the wounds clean and dressing my stitches daily, but should I really be taking the pills or doing anything else in particular?

Thanks in advance, any replies will to some way in alleviating my infection-related anxiety!

Disclaimer: I am not a 'gap year idiot' who has gone out intoxicated on a moped and fallen off, I've been riding a motorcycle for 10 years and got a little unlucky. My first ever serious fall!

Thanks again.

[real_jimmy]

Just make sure you do not let the water get into these wounds. Keep the wounds away from water.  

[DrBoogy]

Oh, well I've failed miserably on that front I'm afraid. Why so?