Chain of infection
This presentation is the property of its rightful owner.
Sponsored Links
1 / 17

CHAIN OF INFECTION PowerPoint PPT Presentation


  • 88 Views
  • Uploaded on
  • Presentation posted in: General

CHAIN OF INFECTION. STI POINT OF VIEW. Chain of Infection. Vector – infected person Pathogen – Bacteria or Virus Reservoir – where “it lives” Portal of Exit – Mode of Transmission Portal of Entry Susceptible Host. Vector: Person with STI. Considerations Behavior of the person

Download Presentation

CHAIN OF INFECTION

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Chain of infection

CHAIN OF INFECTION

STI POINT OF VIEW


Chain of infection1

Chain of Infection

  • Vector – infected person

  • Pathogen – Bacteria or Virus

  • Reservoir – where “it lives”

  • Portal of Exit –

  • Mode of Transmission

  • Portal of Entry

  • Susceptible Host


Vector person with sti

Vector: Person with STI

  • Considerations

    • Behavior of the person

      • Precautions

      • Number of partners

    • Stage of infection

      • Active

      • Latent


Reservoir

Reservoir

Virus

Bacteria

Mucous Membranes

Throat

Vagina

Urethral opening of Penis

Anus/Rectum

Infected Secretions

Vaginal fluids

Cervical Fluids

Semen

Pre-ejaculate

  • Skin

    • HPV lives in skin cells

  • Nerve Endings

    • Herpes Simplex 2 lives in nerve endings

  • Blood

    • HIV

    • Hepatitis B

      • (greater concentrations, more infectious than HIV)

  • Semen – HIV, HBV

  • Vaginal fluids -- ditto

  • Cervical fluids -- ditto


Infectious agent

Infectious Agent

  • Virus

    • HIV

    • Herpes Type 2 (genital)

    • Human Papilloma Virus

    • Hepatitis B Virus

  • Bacteria

    • Chlamydia

    • Gonorrhea


Portal of exit

Portal of Exit

Virus

Bacteria

Contact with other mucous membrane

Gonorrhea

Chlamydia

Syphilis

  • Through shedding of infected skin cells

    • Herpes

    • HPV

  • Released in body fluids

    • HIV

    • HBV


Mode of transmission

Mode of Transmission

Virus

Bacteria

Oral sex

Gonorrhea

Chlamydia

Put in throat by penis

Intercourse – Anal and Vaginal

Either partner

Gonorrhea

Chlamydia

Infected mucous membranes rub

  • Intercourse – Anal and Vaginal

    • Receptive partner

      • HIV

      • HBV

  • Frottage – Rubbing

    • HPV

    • Herpes


Portal of entry

Portal of Entry

Virus

Bacteria

See portal of exit

  • See portal of exit

  • Immune cells at top levels of mucous membranes

    • HIV

  • Wall of colon or rectum and micro-tears

    • HIV

  • Mucous Membrane of vagina

  • Cervix


Susceptible host

Susceptible Host

Viral

Bacteria

Uninfected Person

Never infected before

Infected before but treated and cured

Can get infected again

and again

and again…

  • Uninfected Person

    • No Immunity

      • From having the infection before

      • From getting the antibodies from another person

      • From vaccination

    • Immune system stressed

    • Not taking preventive drugs

      • HIV –

        • Pre Exposure Prophylaxis

    • Social and sexual networks


Breaking the chain

Breaking the chain


Vector control

Vector Control

  • Behavior Modification

  • Social Support

  • Address Social Determinants – Quality of Life

  • Medical Treatment

  • Patient Education


Reservoir1

Reservoir

Virus

Bacteria

Drain the reservoir

Antibiotics will rid of infection

  • Dry up the reservoir by using

    • Anti-Viral Drugs

      • Reduce viral activity

      • Less infectious


Portal of exit1

Portal of Exit

Virus

Bacteria

Condoms!

Anti-Microbials -- ??

NOT spermcides…

  • Condoms!

  • Anti-Microbials (under investigation)

    • Microbicides link


Mode of transmission1

Mode of Transmission

Virus

Bacteria

ABSTAIN until symptoms are cleared

Condoms!

OUTERcourse!!!

  • Intercourse – Anal and Vaginal

  • OUTERcourse!!!

    • Receptive partner

      • HIV

      • HBV

  • Frottage – Rubbing

    • HPV

    • Herpes

      • ABSTAIN during outbreak


Portal of entry1

Portal of Entry

Virus

Bacteria

Condoms!

  • Condoms!


Susceptible host1

Susceptible Host

Viral

Bacteria

Get Tested

Women under 25 who have sex (yearly for Chlamydia)

MSM – every six months to one year

Every 3 months for syphilis in bigger cities.

Get Told (you’ve been exposed)

  • Get Tested

  • Get Vaccinated!

    • Hepatitis B

    • HPV

  • Prevention for High Risk

    • Anti-Viral PrEP (HIV)

      • Pre

      • Exposure

      • Prophylaxis

        • Truvada

        • Work with specialist

        • Monthly check ups

        • Work toward risk reduction


  • Login