Emergin disease and bioterror Flashcards
3 types of emerging disease
- newly emerging- not previously recognized in humans
- re-emerging - previosly recognized but in new places or greater #s
- deliberatly emerging - bioterrorsim
7 factors involved in emergence of disease
- microbial adaptations and change
- international travel and commerce
- intent to harm
- climate and weather
- economic dev. and land use
- breakdown of public health
- human susceptibility
factors involved in HIV (4)
- microbial adaptations and change
- international travel and commerce
- economic dev. and land use
- human susceptibility
def. seasonal flu
mild to moderate resp illness that may be associated with death
def. pndemic flu
- mild to moderate resp illness that may be associated with death
- higher attack rates
- fatality rate may be lower or higher
3 types of seasonal flu
ABC
1 type of avian/swine flu
A
what causes pandemic flu
Novel human influenza viruses formed from
adaptation of avian/swine/other animal influenza
viruses or recombination between
avian/swine/other animal influenza viruses and
human influenza viruses
what allows flu to recombine so easily
7 separate RNA segments that can be swapped
what was H1N1
quad combination of 2 swine, 1 avian, 1 human flus
what are H1N1 attack and death rates
attack - 14.5%
death - 0.5%
3 factors involved in pandemic flu
- Microbial adaptation and change
- Travel and commerce
- Human susceptibility to infection
what is SARS
febrile illness with 10% fatality rate
where did SARS come from
close proximity with civet cats in asia and then hong kong hotel
3 factors involved in SARS spread
- Microbial adaptation and change
- Travel and commerce
- Human susceptibility to infection
what are HIV, flu, and SARS
newly emerging disease
2 examples of re-emergin disease
- west nile
2. ebola
what is west nile
- mosquito borne
- febrile ilness to encephalitis
- from uganda
- in NA in 1999
what is west nile reservoir
birds
2 factors involved in west nile
- travel and commerce
2. susceptibility of humans
where was ebola originally
sudan and zaire, then central africa
where is ebola from
bats or infected animals
3 factors involved in ORIGNAL ebola spread
- microbial adaptation
- economic dev. and land use
- human susceptibility
4 factors involved in re-emergnece
- microbial adaptation
- travel and commerce
- public health breakdown
- human susceptability
what makes and agent a class A bio agent
- easily disseminated
- easily transmitted
- high mortality
examples of class A
- antrax
- yersinia pestis
- clostridium botulinum
what is antrax
- bacillus antracis
- spore forming Gr+ bacillus normally found in soil