Category: How To ...
American Red Cross Text-Book on Home Hygiene and Care of the Sick
Communicable diseases, 1. Micro-organisms and bacteria, 1. Parasites, 3. Structure and development of parasites, 4. Bacteria, 4. Shape, 4. Size, 5. Motion, 5. Multiplication, 5. Spores, 7. Distribution, 8. Protozoa, 8. Visible parasites, 8. Transmission of pathogenic organisms...