1.   Dendritic cells lie in wait, ready to greet and capture invading microbes like HIV, the AIDS virus, that enter through the mucosa.

2.   Immune globulin is a fraction of the blood that contains antibodies, the proteins that defend against invading microbes.

3.   Now, the National Research Council wants them to worry a little more about the risk of invading Martian microbes.

4.   The immune system puts up two general types of defense against invading microbes.

5.   But if the invading microbe is especially nasty and our immune defences are weak then the infection spreads from a localised one to that of a generalised one.

6.   It showed how the body recognizes not only invading microbes but also environmental substances that provoke the immune system, he added.

7.   It showed how the body recognizes not only invading microbes but also environmental substances that provoke the immune system, he said.

8.   Naturally-occurring dietary toxins and contaminants, environmental chemicals and mutagens from cooking, hormones from meats, and invading microbes pose a serious threat to health.

9.   Previous studies showed it was a promising site for genes involved with recognizing invading microbes.