MediZine LLC, the producer of print and online health education content, has acquired the Web portal HealthCommunities.com Inc. as part of its audience growth strategy. HealthCommunities features physician Web sites and educational content on health for consumers. The portal also hosts 30 different patient communities, reaching more than 1.5 million monthly visitors and more than 2,300 practicing physicians — an audience that MediZine executives see as a perfect target for its own editorial products, partners and advertisers.