Infestation rate

The infestation rate (also attack rate from English attack rate ) or disease rate is in epidemiology the proportion of a population that becomes ill with the infection in an epidemic. Since the period of the entire epidemic is usually considered, it is not a rate in the actual sense, but a cumulative incidence . The term is also used outside of infectiology, for example in the context of mass poisoning. The infestation rate is defined as

${\displaystyle {\text{Befallsrate}}={\frac {\text{Exponierte Empfängliche einer Gruppe, die in einem bestimmten Zeitraum erkrankten}}{\text{Exponierte Empfängliche in dieser Gruppe insgesamt}}}}$.

Must be distinguished from that is secondary attack rate (English: secondary attack rate ). This enables statements to be made about the contagion of a pathogen. It is the proportion of infections after contact (contact cases) with an infected person within the incubation period of the total number of contacts. If possible, the total number should be limited to the susceptible (infectable) proportion of the population, if this proportion can be determined. The secondary infestation rate is defined by

${\displaystyle {\text{sekundäre Befallsrate}}={\frac {\text{Erkrankte unter den Kontaktfällen eines Inzidenzfalles in der Inkubationszeit}}{\text{Gesamtanzahl der Kontaktfälle (Exponierten) in diesem Zeitraum}}}}$.

Individual evidence

1. ↑ Wolfgang Kiehl: Infection protection and infection epidemiology. Technical terms - definitions - interpretations. Ed .: Robert Koch Institute, Berlin 2015, ISBN 978-3-89606-258-1 , p. 21, keyword infestation rate
2. ↑ ^{a b} Miquel Porta (Ed. For the International Epidemiological Association), A Dictionary of Epidemiology , 5th Edition, Oxford UP 2008
3. ↑ Wolfgang Kiehl: Infection protection and infection epidemiology. Technical terms - definitions - interpretations. Ed .: Robert Koch Institute, Berlin 2015, ISBN 978-3-89606-258-1 , p. 21, keyword infestation rate
4. ↑ Wolfgang Kiehl: Infection protection and infection epidemiology. Technical terms - definitions - interpretations. Ed .: Robert Koch Institute, Berlin 2015, ISBN 978-3-89606-258-1 , p. 21, keyword infestation rate