Disease Classifications

Class A Diseases (1)
Diseases of major public health concern because of the severity of disease or potential for epidemic spread • report by telephone immediately upon recognition that a case, a suspected case, or a positive laboratory result exists

Anthrax Rabies, human
Botulism, foodborne Rubella (not congenital)
Cholera Severe Acute Respiratory Syndrome (SARS)
Diphtheria Smallpox
Measles Tularemia
Meningococcal disease Viral hemorrhagic fever (VHF)
Plague 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 A Diseases (2)
Diseases of pubic health concern needing timely response because of potential for epidemic spread • 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

Arboviral neuroinvasive and non-neuroinvasive disease
- Eastern equine encephalitis virus disease
- LaCrosse virus disease (other California serogroup virus disease)
- Powassan virus disease
- St. Louis encephalitis virus disease
- West Nile virus disease (also current infection)
- Western equine encephalitis virus disease
- Other arthropod-borne disease
Chancroid
Cyclosporiasis
Coccidioidomycosis *
Dengue
E. coli O157:H7 and other enterohemorrhagic (Shiga toxin-producing) E. coli
Foodborne disease outbreaks
Granuloma inguinale
Haemophilus influenzae (invasive disease)
Hantavirus
Hemolytic uremic syndrome (HUS)
Hepatitis A
Hepatitis B, perinatal
Influenza-associated pediatric mortality
Legionnaires’ disease
Listeriosis
Lymphogranuloma venereum
Malaria
Meningitis, aseptic, including viral meningoencephalitis
Mumps
Pertussis
Poliomyelitis (including vaccine-associated cases)
Psittacosis
Q fever
Rubella (congenital)
Salmonellosis
Shigellosis
Staphylococcus aureus, with resistance or intermediate resistance to Vancomycin (VRSA, VISA)
Syphilis
Tetanus
Tuberculosis, including multi- drug resistant tuberculosis (MDR-TB)
Typhoid fever
Waterborne disease outbreaks

Class A Diseases (3)
Diseases of significant public health concern • report by the end of the work week after the existence of a case, a suspected case, or a positive laboratory result is known

Amebiasis
Botulism, wound
Botulism, infant
Brucellosis
Campylobacteriosis
Chlamydia infections (urethritis, epididymitis, cervicitis, pelvic inflammatory disease, neonatal conjunctivitis and pneumonia)
Creutzfeldt-Jakob disease (CJD)
Cryptosporidiosis
Cytomegalovirus (CMV) (congenital)
Ehrlichiosis
Encephalitis, other viral
Encephalitis, post-infection
Giardiasis
Gonococcal infections (urethritis, cervicitis, pelvic inflammatory disease, pharyngitis, arthritis, endocarditis, meningitis and neonatal conjunctivitis)
Hepatitis B, non perinatal
Hepatitis C
Hepatitis D (delta hepatitis)
Hepatitis E
Herpes (congenital)
Kawasaki disease (mucocutaneous lymph node syndrome)
Leprosy (Hansen disease)
Leptospirosis
Lyme disease
Meningitis, including other bacterial
Mycobacterial disease, other than tuberculosis (MOTT)
Reye syndrome
Rheumatic fever
Rocky Mountain spotted fever (RMSF)
Streptococcal disease, group A, invasive (IGAS)
Streptococcal disease, group B, in newborn
Streptococcal toxic shock syndrome (STSS)
Streptococcus pneumoniae, invasive disease (ISP)
Toxic shock syndrome (TSS)
Toxoplasmosis (congenital)
Trichinosis
Varicella
Vibriosis
Yersiniosis

Class B Diseases - the number of cases is to be reported by the close of each working week

Influenza

Class C Diseases - report an outbreak, unusual incidence, or epidemic by the end of the next working day

Blastomycosis
Conjunctivitis, acute
Histoplasmosis
Nosocomial infections of any type
PediculosisScabies
Sporotrichosis
Staphylococcal skin infections
Toxoplasmosis
Outbreak, unusual incidence, or epidemic of other infectious diseases of known etiology not categorized as Class A, Class B or Class C

Updated January 2006

 
 
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