Provider Reportable Diseases
Category 1 Disease Reporting
1. Report to DPH by phone on the day of diagnosis or suspicion.
- Business hours: (860) 509-7994
- Evenings, weekends, holidays: (860) 509-8000
2. Complete and submit a PD-23 within 12 hours.
3. Report to the local Director of Health in town of patient residence.
4. Diseases with specialized reporting forms are asterisked (*).
Category 1 Diseases
| Acute HIV Infection* (1,2) | Poliomyelitis |
| Anthrax | Q fever |
| Botulism | Rabies |
| Brucellosis | Ricin poisoning |
| Cholera | Severe Acute Respiratory Syndrome (SARS) |
| Diphtheria | Smallpox |
| Measles | Staphylococcal enterotoxin B pulmonary poisoning |
| Melioidosis | Staphylococcus aureus disease, reduced or resistant susceptibility to vancomycin |
| Meningococcal disease | Syphilis, congenital* |
| Outbreaks | Tuberculosis* |
| ◦ foodborne (involving ≥ 2 persons) | Tularemia |
| ◦ institutional | Venezuelan equine encephalitis virus infection |
| ◦ unusual disease or illness (3) | Viral hemorrhagic fever |
| Plague | Yellow fever |
Category 2 Disease Reporting
1. Complete and submit a PD-23 within 12 hours.
2. Hospital IPs entering cases in CTEDSS satisfies the reporting requirement.
3. Diseases with specialized reporting forms are asterisked (*).
Category 2 Diseases
| Acquired Immunodeficiency Syndrome* (1,2) | Histoplasmosis |
| Acute flaccid myelitis | HIV-1/HIV-2 infection* (1,2) |
| Anaplasmosis | HPV: biopsy proven CIN 2, CIN 3, or AIS or their equivalent (1) |
| Babesiosis | Influenza-associated death |
| Blastomycosis | Influenza-associated hospitalization |
| Blood lead ≥ 3.5μg/dL in pregnant persons (4) | Legionellosis |
| Borrelia miyamotoi disease | Listeriosis |
| California group arbovirus infection | Malaria |
| Campylobacteriosis | Mercury poisoning |
| Candida auris | Mpox |
| Chancroid | Multisystem inflammatory syndrome in children (MIS-C) |
| Chickenpox (Varicella)* | Mumps |
| Chickenpox-related death* | Neonatal bacterial sepsis (8) |
| Chikungunya | Occupational asthma* |
| Chlamydia (C. trachomatis) (all sites)* | Oropouche virus infection |
| COVID-19 death | Pertussis |
| COVID-19 hospitalization | Pneumococcal disease, invasive (5) |
| Cronobacter in infants (<1 year) | Powassan virus infection |
| Cryptosporidiosis | Respiratory Syncytial Virus (RSV) associated death |
| Cyclosporiasis | RSV-associated hospitalization |
| Dengue | Rubella (including congenital) |
| E-cigarette or vaping product use associated lung injury (EVALI)* | Salmonellosis |
| Eastern equine encephalitis virus infection | Shiga toxin-related diseases (gastroenteritis) |
| Ehrlichia chaffeensis infection | Shigellosis |
| Escherichia coli O157:H7 infection | Silicosis |
| Escherichia coli, invasive, in infants (<1 year) (5) | Spotted fever rickettsiosis |
| Gonorrhea* | St. Louis encephalitis virus infection |
| Group A Streptococcal disease, invasive (5) | Syphilis* |
| Group B Streptococcal disease, invasive (5) | Tetanus |
| Haemophilus influenzae disease, invasive (5) | Trichinosis |
| Hansen’s disease (Leprosy) | Typhoid fever |
| Healthcare-associated infections (6) | Vaccinia disease |
| Hemolytic-uremic syndrome (7) | Vibrio infection (V. parahaemolyticus, V. vulnificus, others) |
| Hepatitis A | West Nile virus infection |
| Hepatitis B | Zika virus infection |
| ◦ acute infection (2) | |
| ◦ HBsAg positive pregnant women | |
| Hepatitis C | |
| ◦ acute infection (2) | |
| ◦ perinatal infection | |
| ◦ positive rapid antibody test result |
PD-23 Footnotes
- Report only to DPH.
- As described in the CDC case definition.
- Individual cases of “significant unusual illness” are also reportable.
- Fax PD-23 to (959) 200-4751.
- Invasive disease: from sterile fluid (blood, CSF, pericardial, pleural, peritoneal, joint, or vitreous), bone, internal body sites, or other normally sterile site, including muscle.
- Report Healthcare Associated Infections (HAIs) as required by Conn. Gen. Stat. §§ 19a-490o and 19a-215. Detailed instructions on the types of HAIs, facility types, locations and methods of reporting are available on the DPH website.
- On request from the DPH and if adequate serum is available, send serum from patients with HUS to the State Public Health Laboratory for antibody testing.
- Clinical sepsis and blood or CSF isolate obtained from an infant <3 days of age.
Specialized Reporting Forms & Fax Numbers
Chickenpox (Varicella) Report (860) 707-1905
HIV Case Report Form (860) 509-8237
Occupational Diseases Report (860) 730-8424
Sexually Transmitted Diseases (860) 730-8380
Tuberculosis Report Form (860) 730-8271
Vaping Lung Injury Case Report (860) 706-1262
Return to: Reportable Diseases
Updated 11/25/2025