CONTINENTAL HEALTH <CTHL> PURCHASES MARKETECH Continental Health Affiliates Inc said that it has acquired <Marketech Inc>, an 80 pct partner in <Diatronics Nutrition Services>. Continental said Diantronics Nutrition Services is a joint venture with physicians providing patient-ready home infusion therapy products and services to outpatients of five northern New Jersery hospitals representing over 1,900 inpatient beds. Continental said the terms of the deal were not disclosed.