With many diseases, the immune system is able to recognise the invading bacteria as foreign and launch an attack, sending special defence cells to latch onto and destroy.

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Ribosomes are a key target for antibiotics, as antibiotics are able to attack the ribosomal activity of harmful bacteria while leaving human ribosomes untouched.

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The audience favorite, however, was Steve Meretzky's "Bac Attack, " which would let human players combat armies of bacteria via a microscope-equipped "TrayStation" gaming device.

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Antigen-presenting cells collect fragments of proteins from foreign bodies (normally pathogens, such as viruses and bacteria, but also transplanted organs) and show these to T cells, in order to tell them what to attack.

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