There are a number of reasons why silver seems to have much more effectiveness than normal antibiotics. This causes silver to virtually seek out and destroy pathogens, instead of simply having to move around until they happen to bump into each other. 2 Silver kills immediately by oxidizing the pathogen. In both cases, the immune system must take care of most or all of the pathogens. With silver, they are killed outright immediately.
Silver is a catalyst.
Thus, as soon as a particle of silver has oxidized a pathogen, the pathogen loses its' negative charge and floats away, and the silver is free to attack another pathogen. Antibiotics usually bind with the pathogen and for each pathogen destroyed, one particle or molecule of the antibiotic is used up. The result is that silver will usually give a much faster kill than an antibiotic. The body simply does not have time to eliminate the huge amount of toxins and dead pathogens that can result from colloidal silver. Other therapies which work along similar lines, such as ozonated water, are reported to have the same problem.