oh i just found this it may have naswered my own stupid question!!
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However, thorough cooking should kill any listeria, so it should be safe to eat food containing soft mould-ripened or blue-veined cheeses, provided the food has been properly cooked and is piping hot all the way through.


Cheeses which are SAFE to eat in pregnancy

Hard cheeses:
austrian smoked, Babybel, caerphilly, cheddar, cheshire, derby, double gloucester, edam, emmental, english goat's cheddar, feta (if bought in the UK), gouda, gruyere, halloumi, havarti, jarlsberg, lancashire, mozzarella, orkney, paneer, parmesan, pecorino (hard), provolone, red leicester.

Soft and processed cheeses:
Boursin, cottage cheese, cheese spread, cream cheese, mascarpone, philadelphia, quark, ricotta.

Yoghurts, fromage frais, soured cream and creme fraiche -- any variety, including natural, flavoured and biologically active -- are all safe to eat.

Cheeses to AVOID in pregnancy

Mould-ripened soft cheeses:
brie, blue brie, cambozola, camembert, chaumes, pont L'eveque, prince jean, tallegio. vacherin-fribourgeois, weichkaese.

Blue-veined cheeses:
bavarian blue, bergader, bleu d'Auvergne, blue shropshire, cabrales, Danish blue, dolcelatte, doppelrhamstuge, eldel pilz, gorgonzola, manchego, romano, roncal, roquefort, stilton, tommes, wensleydale (blue).

Soft unpasteurised goat and sheep's cheeses:
chabichou, pyramide, torta del cesar.