<span>Infection is the term used to describe the process through microorganisms that cause diseases. The invasion of a host by a pathogenic microorganism multiplies in the tissues and the reaction of the host to its presence and to its possible toxins and can be caused by bacteria, fungi, viruses, protozoa or prions.</span>
Protein deficiency can cause muscle cramping, weakness, and soreness. If you aren't consuming enough protein, your body will start to take protein from your skeletal muscles, which will lead to your muscles wasting over time.