Ok, next question....

On a thread on here recently about safe and unsafe foods some very helpful person posted a link to the NSW health authority booklet on pregnancy and food. The info is great - I have printed it a posted it on my fridge as it's clear and thorough. Largely I was aware of the major do's and don'ts but one bit really surprised me: it says DON"T EAT alfalfa sprouts, broccoli sprouts, onion sprouts... and lists about 5 other types of sprouts. REALLY? WHY? I thought sprouts were really good for you and have never heard this warning before. Unfortunately it doesn't offer an explanation. I've eaten sprouts twice that I can think of during this preg but am choosing not to freak myself out about it. Just want to know why the serious warning. Any thoughts?

Thanks in advance lovely people!