The antonyms for the word "hygienic treatment" can be several terms that denote lack of cleanliness, disinfection and sterilization. These include contaminated treatment, unsanitary care, unsterilized procedure, infected process or filthy handling. The opposite of hygienic treatment can also be described as negligent, careless, or unprofessional practice, where the safety and health of the patient or the environment is compromised. In contrast to hygienic, the inadequate, filthy, or unhealthy practices are likely to cause infections, diseases and complications. Therefore, it is essential to receive proper, hygienic treatment to prevent the spread of harmful bacteria, viruses, and infections.