IDRS - Infectious Disease Reporting System

Requirements & Guidelines

Reporting Requirements

Ohio Department of Health's Infectious Disease Reporting Requirements
A Quick Guide to Reportable Disease Classifications in Ohio


Diseases of major public health concern because of the severity of disease or potential for epidemic spread.

Reporting Requirement: Report by telephone immediately upon recognition that a case, a suspected case, or a positive laboratory result exists.

Class A Disease Listing

Anthrax Plague
Botulism, foodborne Rabies, human
Cholera Rubella (not congenital)
Diphtheria Severe acute respiratory syndrome (SARS)
Influenza A - novel virus Smallpox
Measles Tularemia
Meningococcal disease Viral hemorrhagic fever (VHF) 
Including Ebola, Lassa Fever, Marburg hemorrhagic fever, and Crimean-Congo hemorrhagic fever
MERS CoV Yellow fever
Any unexpected pattern of cases, suspected cases, deaths or increased incidence of any other disease of major public health concern, because of the severity of disease or potential for epidemic spread, which may indicate a newly recognized infectious agent, outbreak, epidemic, related public health hazard or act of bioterrorism.

Class B Diseases

Diseases of pubic health concern needing timely response because of potential for epidemic spread.

Reporting Requirement: Report by the end of the next business day after the existence of a case, a suspected case, or a positive laboratory result is known.

Class B Disease Listing

Arboviral neuroinvasive and non-neuroinvasive disease: Eastern equine, LaCrosse virus disease (other California serogroup virus disease), Powassan virus disease, St. Louis encphalitis virus disease, West Nile virus infection, Western equine encephalitis virus disease, Other arthropod-borne disease
Amebiasis Leprosy (Hansen disease)

Arboviral neuroinvasive and non-neuroinvasive disease (including: Chikungunya virus infectionEastern equine encephalitis virus disease LaCrosse virus disease (other California serogroup virus disease) • Powassan virus disease St. Louis encephalitis virus diseaseWest Nile virus infectionWestern equine encephalitis virus diseaseZika virus infection • Other arthropod-borne diseases)

Babesiosis Listeriosis
Botulism, infant Lyme disease
Botulism, wound Malaria
Brucellosis Meningitis, aseptic (viral)
Campylobacteriosis Meningitis, bacterial
Chancroid Mumps
Chlamydia trachomatis infections  Pertussis
Coccidioidomycosis Poliomyelitis (including vaccine-associated cases)
Creutzfeldt-Jakob disease (CJD) Psittacosis
Cryptosporidiosis Q fever
Cyclosporiasis Rubella (congenital)
Dengue Salmonellosis
E. coli O157:H7 & other enterohemorrhagic (shiga toxin-producing) E. coli Shigellosis
Ehrlichiosis/Anaplasmosis Spotted Fever Rickettsiosis, including Rocky Mountain spotted fever
Giardiasis Staphylococcus aureus, with resistance or intermediate resistance to Vancomycin (VRSA, VISA)
Gonococcal infections (urethritis, cervicitis, pelvic, inflammatory disase, pharyngitis, arthritis, endocarditis, meningitis and neonatal conjunctivitis) Streptococcal disease, group A, invasive (IGAS)
Haemophilus influenzae (invasive disease) Streptococcal disease, group B, in newborn
Hantavirus Streptococcal toxic shock syndrome (STSS)
Hemolytic uremic syndrome (HUS) Streptococcus pneumoniae, invasive disease (ISP)
Hepatitis A Syphilis
Hepatitis B, non-perinatal Tetanus
Hepatitis B, perinatal Toxic Shock Syndrome (TSS)
Hepatitis C Trichinosis
Hepatitis D (delta hepatitis) Tuberculosis, including multi-drug resistant tuberculosis (MDR-TB)
Hepatitis E Typhoid fever
Influenza-associated hospitalization Varicella
Influenza-associated pediatric mortality Vibriosis
Legionnaires' disease Yersiniosis

Class C Diseases

Outbreaks, unusual incidence, or epidemics (e.g., histoplasmosis, pediculosis, scabies, staphylococcal infections)

Reporting Requirement: Report an outbreak, unusual incidence, or epidemic  by the end of the next business day.


Community Healthcare-associated Waterborne
Foodborne Institutional Zoonotic

Guidelines & Manuals

CDC STD Guidelines and Recommendations
Ohio Infectious Disease Control Manual (IDCM)


Find general reporting forms and instructions on the Reports page.

For a specific disease-related form, explore our comprehensive Disease page.