Transmission of Pathogens (OCR A-Level Biology A): Flashcards
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Disease transmission
Disease transmission
Movement of pathogens from infected to uninfected hosts
Direct transmission
Direct transmission
Transfer between hosts without intermediate organism
Indirect transmission
Indirect transmission
Transfer via intermediate organism (vector) unharmed by pathogen
Vector (in disease transmission)
Vector (in disease transmission)
Organism transferring pathogens between hosts without harm
Diseases spread by droplet infection
Diseases spread by droplet infection
TB bacteria, influenza viruses, meningitis-causing bacteria
AIDS (acquired immunodeficiency syndrome)
AIDS (acquired immunodeficiency syndrome)
Collection of opportunistic infections from weakened immunity
Endemic disease
Endemic disease
Disease constantly present in a population at baseline levels
Epidemic
Epidemic
Significant increase in disease cases within a population
Resistance (to disease)
Resistance (to disease)
Inherited genetic traits preventing infection from birth
Min temp for Plasmodium development in mosquitoes
Min temp for Plasmodium development in mosquitoes
20°C