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TTrraannssmmiittttiinngg 
IInnffeeccttiioonn
TTrraannssmmiittttiinngg IInnffeeccttiioonn 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
 DDiirreecctt ccoonnttaacctt 
 IInnddiirreecctt ccoonnttaacctt 
 AAiirrbboorrnnee 
 VVeeccttoorr--bboorrnnee 
22
TTrraannssmmiittttiinngg IInnffeeccttiioonn 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
DDiirreecctt ccoonnttaacctt 
 PPeerrssoonn ttoo ppeerrssoonn 
 AAnniimmaall ttoo ppeerrssoonn 
 MMootthheerr ttoo uunnbboorrnn cchhiilldd 
33
TTrraannssmmiittttiinngg IInnffeeccttiioonn 
IInnddiirreecctt ccoonnttaacctt 
 PPaatthhooggeennss aarree ppaasssseedd aalloonngg oonn iinnaanniimmaattee 
oobbjjeeccttss 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
44
TTrraannssmmiittttiinngg IInnffeeccttiioonn 
AAiirrbboorrnnee 
 PPaatthhooggeennss aarree ccaarrrriieedd 
tthhrroouugghh tthhee aaiirr 
 CClliinngg ttoo ssuurrrroouunnddiinnggss 
aanndd aarree sspprreeaadd 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
55
TTrraannssmmiittttiinngg IInnffeeccttiioonn 
VVeeccttoorr--bboorrnnee 
 IInnsseeccttss ccaarrrryy ppaatthhooggeenn 
ffrroomm hhoosstt ttoo hhoosstt Flea 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
Tick 
Mosquito 
66
TTrraannssmmiittttiinngg IInnffeeccttiioonn 
HHooww yyoouu ggeett aann iinnffeeccttiioonn…… 
–CCaauussaattiivvee aaggeenntt 
–RReesseerrvvooiirr 
–PPoorrttaall ooff eexxiitt 
–MMooddee ooff ttrraannssmmiissssiioonn 
–PPoorrttaall ooff eennttrryy 
–SSuusscceeppttiibbllee hhoosstt……bbrreeaakkiinngg tthhee cchhaaiinn!! 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
77
CChhaaiinn ooff IInnffeeccttiioonn 
Causative agent 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
Source 
or 
reservoir 
Portal of exit 
Mode of transmission 
Susceptible host 
Portal of entry 
88
CChhaaiinn ooff IInnffeeccttiioonn 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
 CCaauussaattiivvee aaggeenntt 
– ppaatthhooggeenn 
99
CChhaaiinn ooff IInnffeeccttiioonn 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
 RReesseerrvvooiirr 
– aarreeaa wwhheerree tthhee 
ppaatthhooggeenn ccaann lliivvee 
1100
CChhaaiinn ooff IInnffeeccttiioonn 
 PPoorrttaall ooff eexxiitt 
– wwaayy ffoorr tthhee ppaatthhooggeenn ttoo 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
eessccaappee ffrroomm tthhee 
rreesseerrvvooiirr 
1111
CChhaaiinn ooff IInnffeeccttiioonn 
 MMooddee ooff ttrraannssmmiissssiioonn 
– wwaayy ffoorr ppaatthhooggeenn ttoo bbee 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
ttrraannssmmiitttteedd 
1122
CChhaaiinn ooff IInnffeeccttiioonn 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
 PPoorrttaall ooff eennttrryy 
– wwaayy ttoo eenntteerr nneeww 
rreesseerrvvooiirr 
1133
CChhaaiinn ooff IInnffeeccttiioonn 
 SSuusscceeppttiibbllee hhoosstt 
– aabbllee ttoo bbee aaffffeecctteedd 
– ppeerrssoonn lliikkeellyy ttoo ggeett ssiicckk 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
1144
CChhaaiinn ooff IInnffeeccttiioonn 
Causative agent 
2.02 Understand iinnffeeccttiioonn ccoonnttrrooll 
pprroocceedduurreess 
Source 
or 
reservoir 
Portal of exit 
Mode of transmission 
Susceptible host 
Portal of entry 
1155

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2.02 Transmitting Infection

  • 2. TTrraannssmmiittttiinngg IInnffeeccttiioonn 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess  DDiirreecctt ccoonnttaacctt  IInnddiirreecctt ccoonnttaacctt  AAiirrbboorrnnee  VVeeccttoorr--bboorrnnee 22
  • 3. TTrraannssmmiittttiinngg IInnffeeccttiioonn 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess DDiirreecctt ccoonnttaacctt  PPeerrssoonn ttoo ppeerrssoonn  AAnniimmaall ttoo ppeerrssoonn  MMootthheerr ttoo uunnbboorrnn cchhiilldd 33
  • 4. TTrraannssmmiittttiinngg IInnffeeccttiioonn IInnddiirreecctt ccoonnttaacctt  PPaatthhooggeennss aarree ppaasssseedd aalloonngg oonn iinnaanniimmaattee oobbjjeeccttss 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess 44
  • 5. TTrraannssmmiittttiinngg IInnffeeccttiioonn AAiirrbboorrnnee  PPaatthhooggeennss aarree ccaarrrriieedd tthhrroouugghh tthhee aaiirr  CClliinngg ttoo ssuurrrroouunnddiinnggss aanndd aarree sspprreeaadd 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess 55
  • 6. TTrraannssmmiittttiinngg IInnffeeccttiioonn VVeeccttoorr--bboorrnnee  IInnsseeccttss ccaarrrryy ppaatthhooggeenn ffrroomm hhoosstt ttoo hhoosstt Flea 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess Tick Mosquito 66
  • 7. TTrraannssmmiittttiinngg IInnffeeccttiioonn HHooww yyoouu ggeett aann iinnffeeccttiioonn…… –CCaauussaattiivvee aaggeenntt –RReesseerrvvooiirr –PPoorrttaall ooff eexxiitt –MMooddee ooff ttrraannssmmiissssiioonn –PPoorrttaall ooff eennttrryy –SSuusscceeppttiibbllee hhoosstt……bbrreeaakkiinngg tthhee cchhaaiinn!! 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess 77
  • 8. CChhaaiinn ooff IInnffeeccttiioonn Causative agent 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess Source or reservoir Portal of exit Mode of transmission Susceptible host Portal of entry 88
  • 9. CChhaaiinn ooff IInnffeeccttiioonn 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess  CCaauussaattiivvee aaggeenntt – ppaatthhooggeenn 99
  • 10. CChhaaiinn ooff IInnffeeccttiioonn 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess  RReesseerrvvooiirr – aarreeaa wwhheerree tthhee ppaatthhooggeenn ccaann lliivvee 1100
  • 11. CChhaaiinn ooff IInnffeeccttiioonn  PPoorrttaall ooff eexxiitt – wwaayy ffoorr tthhee ppaatthhooggeenn ttoo 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess eessccaappee ffrroomm tthhee rreesseerrvvooiirr 1111
  • 12. CChhaaiinn ooff IInnffeeccttiioonn  MMooddee ooff ttrraannssmmiissssiioonn – wwaayy ffoorr ppaatthhooggeenn ttoo bbee 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess ttrraannssmmiitttteedd 1122
  • 13. CChhaaiinn ooff IInnffeeccttiioonn 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess  PPoorrttaall ooff eennttrryy – wwaayy ttoo eenntteerr nneeww rreesseerrvvooiirr 1133
  • 14. CChhaaiinn ooff IInnffeeccttiioonn  SSuusscceeppttiibbllee hhoosstt – aabbllee ttoo bbee aaffffeecctteedd – ppeerrssoonn lliikkeellyy ttoo ggeett ssiicckk 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess 1144
  • 15. CChhaaiinn ooff IInnffeeccttiioonn Causative agent 2.02 Understand iinnffeeccttiioonn ccoonnttrrooll pprroocceedduurreess Source or reservoir Portal of exit Mode of transmission Susceptible host Portal of entry 1155