An example is a corn plant that has been genetically engineered to produce avidin, a chemical used in diagnostic assays. Avidin is traditionally obtained from chicken egg whites. At this rate, avidin from corn is much cheaper than avidin from eggs. Extracting and purifying avidin from corn is less costly and time consuming than processing eggs and produces less waste. There are many advantages to using plants to produce industrial chemicals.
Corn is easy to grow.
Also, unlike eggs, corn kernels can be stored for a long time before processing. It's biological warfare at the microbial level. Bacteriophage are viruses that attack and destroy bacteria and it may be possible to use them to treat bacterial infections. Multiple-drug resistant bacteria are a major medical problem because they are resistant to so many antibiotics. This makes them very difficult, if not impossible, to eradicate.