DTH reactions may include, but are not limited to, contact dermatitis (eg, poison ivy rash), tuberculin skin test reactions, granulomatous inflammation (eg, sarcoidosis, Crohn disease), allograft rejection, graft versus host disease, and autoimmune hypersensitivity reactions.
tricks of the trade. 1  Clever ways of operating a business or performing a task or activity, especially slightly dishonest or unfair ones. For example, Alma knows all the tricks of the trade, cutting the fabric as close as possible, or The butcher weighs meat after it's wrapped; charging for the packaging is one of the tricks of the trade.
Unfair trade practice refers to the use of various deceptive, fraudulent or unethical methods to obtain business. Unfair trade practices include misrepresentation, false advertising or representation of a good or service, tied selling, false free prize or gift offers, deceptive pricing and non-compliance with manufacturing standards.