Which of the following is not an example of direct transmission in communicable diseases ?: (A) Transplacental (veical), (B) Soil, (C) Respiratory, (D) STD
Answer is C. The modes of transmission of infectious diseases can be classified as: * Direct Transmission. Direct contact; Droplet infection; Contact with soil; Inoculation into skin or mucosa; Transplacental (veical)transmission. * Indirect Transmission. Vehicle-borne; Water; food/milk; Vector-borne. Mechanical; Biological. Airborne. ENT ref : park 21st ed