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Biological Health Hazard – Highly Contagious Pertussis Outbreak: Northern Wisconsin, U.S.A.


Published Date: 2017-01-01 10:52:28
Subject: PRO/EDR> Pertussis – USA (01): (WI)
Archive Number: 20170101.4735420

Date: Fri 30 Dec 2016 2:22 PM CST
Source: WSAW [edited]

In northern Wisconsin 2 counties have released new figures regarding the number of whooping cough cases.

The Oneida County and Vilas County health department reports collectively there are 39 confirmed cases, 29 probable, and 98 suspected cases of whooping cough.

The number of cases prompted the Rhinelander School District to extended its Christmas break by 3 days.

According to a news release, Oneida County health officials reported a decrease in new identified cases.

Communicated by:
ProMED-mail from HealthMap Alerts

[There are pertussis (whooping cough) outbreaks occurring worldwide, associated with significant morbidity and mortality, especially in infants, variously attributed to increased virulence of outbreak strains, a mismatch between the vaccine strain and the current circulating clones of _Bordetella pertussis_, a waning immune or ineffective immune response after vaccination with the current DTaP and Tdap [diphtheria, tetanus, and pertussis] vaccines, as well as decreased levels of vaccine utilization in some areas. A discussion of these issues can be found in prior ProMED-mail posts (such as, Pertussis – USA (14) 20151110.3781837 and Pertussis – USA (02) 20130905.1923593).

Data from the Wisconsin DOH indicate that 2012 was an epidemic year, but subsequent years had much lower activity, including 2016 (

The state of Wisconsin can be located on the HealthMap/ProMED-mail interactive map at A county map can be seen at Oneida County, with a population of almost 36 000 residents, and Vilas County, with a population of 21 430 residents, are located in the north-central region of the state (,_Wisconsin and,_Wisconsin). – Mod.ML]

See Also

Pertussis – USA (08): (NM) 20161223.4718641
Pertussis – USA (07): (CA) increased incidence, middle & high schools 20161218.4706211
Pertussis – USA (06) 20160917.4495935
Pertussis – UK: risk to infants 20160911.4477542
Pertussis – USA (05): (MN, OK) increasing incidence 20160728.4377210
Pertussis – USA (04): (CA) increasing incidence, corr 20160701.4318528
Pertussis – USA (04): (CA) increasing incidence 20160629.4315517
Pertussis – USA (03): (CA) fatal 20160504.4202149
Pertussis – USA (02): (NY) 20160403.4135723
Pertussis – USA (01) 20160111.3927199

Pertussis – USA (14) 20151110.3781837

Pertussis – USA (02) 20130905.1923593


A ProMED-mail post
ProMED-mail is a program of the International Society for Infectious Diseases

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