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.
Split and merge into it. Answer by SkilledTradesman. Confidence votes 5. A skilled trade is either a mechanical or electrical job classification requiring specific skills, advanced on the job training and college or vocational classes. The specific trade is defined by job description and state and company training requirements. All workers successfully completing a state qualifying apprenticeship carry a Journeyman card. This card confirms successful completion of advanced training or State Licensing requirements.