Recently, infectious diseases have been found to be most frequent among occupational diseases. Discovery of occupational infectious diseases had a lot of ripple effects in the field of occupational medicine and industrial hygiene. Occupational infections, including parasitic diseases, can limit the range of applied diagnostic and certification procedures only to diseases induced by pathogenic agents or by exposures occurring in the occupational environment . In some cases, it becomes difficult or even impossible to identify the real cause of patients' complaints. Occupational biohazards are infectious agents or hazardous biological materials that exert harmful effects on workers' health, either directly thorough infection or indirectly through damage to the working environment, and it can also include medical waste or samples of a microorganism, virus, or toxin from a biological source