Communicable Disease
CCPHD's Communicable Disease program is dedicated to the investigation, prevention, intervention, control, and surveillance of communicable diseases in Calhoun County. There are 76 communicable diseases that are mandated to be reported in the state of Michigan. They can be broken down into categories based on disease type, some of which can been seen represented in the graphs below. Each of the figures contain confirmed and probable cases for each disease group. Graphs with quarterly counts are preliminary until the end of the calendar year.
The full list of reportable diseases can be found on the MDHHS webpage here.
Foodborne Illness Cases
Foodborne Illness Cases
The above graph shows the number of foodborne illness cases in Calhoun County from 2019 to 2023 divided up into quarterly counts. Some of the pathogens included in these counts are campylobacter, cryptosporidiosis, E. coli, listeriosis, norovirus, salmonellosis, shigellosis, and Shiga toxin-producing E. coli (STEC). The number of cases rises during the summer months due to the increase in parties, gatherings, and festivals held during this time.
Influenza Illness Cases
Influenza Illness Cases
This figures shows the number of influenza, influenza-like, and respiratory syncytial virus cases seen in each quarter from 2019 to 2023. The number of cases is highest during flu season, which usually starts in October and peaks between December and February. There is a sharp decrease in cases seen during the early months of 2020, corresponding to decreased travel, COVID-19 lockdowns, and an increase in mask wearing.
Viral Hepatitis Cases
Viral Hepatitis Cases
The viral hepatitis graph above include all hepatitis cases seen in Calhoun County over the last 5 years broken down by quarters. The count include both chronic and acute illnesses for hepatitis A, B, C, D, and E. The number of cases seen has been rising recently, but is still lower than the peak seen during the July - September 2020 time period. CCPHD conducts case management with hepatitis C cases and helps to link them to treatment either with their primary care physician or through our clinic.
Meningitis Cases
Meningitis Cases
This graph show the number of meningitis cases seen in Calhoun County each year from 2019 to 2023. These counts include aseptic meningitis, bacterial meningitis, meningococcal disease, and invasive Streptococcus pneumoniae. Meningitis cases have seen an overall declines in the past five years, with a dip seen in 2020 during the start of the COVID-19 pandemic.
Vaccine Preventable Disease Cases
Vaccine Preventable Disease Cases
The graph above shows the number of cases caused by a vaccine-preventable disease during the year. Diseases seen in this category include chickenpox, measles, mumps, pertussis, polio, rubella, tetanus, and shingles. Cases have risen from 2019 to 2022, with a dip in 2020.
Tuberculosis Cases
Tuberculosis Cases
The graph above shows the number of tuberculosis cases seen in Calhoun County each year for the past five years. The counts include latent tuberculosis, active tuberculosis, and non-tuberculosis mycobacterium infections.
COVID-19 Cases
COVID-19 Cases