“…In infectious diseases, antibiotics are administered. It has been suggested that an immediate therapy with antibiotics which eliminates microorganisms might decrease the supply of antigen for macrophages, and this in turn would make a rapid functioning of the body's own defense mechanisms less effective (9,19,22). Since in those parts of the body which have poor blood circulation, chemotherapy sometimes results only in subinhibitory levels of antibiotics (20), it is of clinical importance to know what can happen to microorganisms in vivo which have not been reached by a full effective dosage of antibiotics.…”