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Biological Hazards Incautious Diseases Bacteria Parasites Viruses Prions Fungi Parasites Clinical stages of an Infectious Disease Infection Acute period Incubation Decline period Prodromal period Convalescence Infectious Disease Cycle Source / Reservoir of Infection Active carrier Convalescent carrier Healthy Carrier Incubatory carrier Casual or Chronic Transmission of Infectious Agents Airborne Travel over 1 meter or more Droplet Nuclei or Dust Contact Transmission Direct or Indirect Fomites Vectors Droplet PORTAL OF ENTRY Skin Respiratory Tract Gastrointestinal Tract Urigenenital Tract Eyes and Ear Opportunists PORTAL OF ENTRY Adaptations to suit the portal of entry Attachment Resistance against defences Diseases transmitted By Air Bacterial Fungi Tuberculosis Anthrax Histoplasma Candida Legonella Viruses Q – Fever Neisseria Influenza Clamydia Psittacosis Measles Streptococcus Chickenpox Mumps Parasites Toxoplasmosis Colds TB Diseases transmitted By Contact Bacterial Fungi Anthrax Candida Salmonella (food) Tinia TB (milk, meat) Ringworm Staphylococcus Pseudomonas STD Glanders Viruses Hepatitis A Polio Warts Epstine Barr Normal Location of Staphylococcus Staphylococcal infections Staphylococcus Possible location of Streptococcal infections Clamydia Trachoma Tick Borne Lyme Disease Ringworm Control " Personal Hygiene " Sanitation " Vaccination " Passive Immunity " Active Immunity " Antibiotics " Isolation " Quarantine The End