Disease watch — Indiana & U.S. Reported case counts for the most-watched notifiable diseases — for Indiana and for the whole country — with how each changed from the week before. Pulled straight from the CDC’s public NNDSS surveillance data.
What you’re looking at & what it isn’t NNDSS is how U.S. states report cases of specific diseases to the CDC each week. These are reported counts for recent weeks — a factual sense of what’s circulating in Indiana and nationally, not a diagnosis tool.
This is not medical advice. For your own health or official Indiana guidance, see in.gov/health and cdc.gov .
📍 Indiana — 2026 week 41 1,649 reported cases (latest week)
4 diseases rising week-over-week
20 weeks of trend history shown
Foodborne & waterborne
Salmonellosis (excluding Salmonella Typhi infection and Salmonella Paratyphi infection) +2% 48 Campylobacteriosis -27% 30 Shiga toxin-producing Escherichia coli (STEC) +0% 23 Vibriosis (any species of the family Vibrionaceae, other than toxigenic Vibrio cholerae O1 or O139), Probable +0% 4 Hemolytic uremic syndrome post-diarrheal +0% 2 Hepatitis A, Confirmed +0% 2 Listeriosis, Confirmed +0% 2 Vaccine-preventable
Haemophilus influenzae, invasive disease, All ages, all serotypes +0% 10 Measles, Indigenous +0% 6 Meningococcal disease, All serogroups +0% 2 Vector-borne (mosquito & tick)
Arboviral diseases, West Nile virus disease +50% 3 Sexually transmitted infections
Chlamydia trachomatis infection +1% 989 Syphilis, Primary and secondary +0% 12 Syphilis, Congenital +0% 3 Bloodborne hepatitis
Hepatitis C, chronic, Confirmed +0% 50 Hepatitis B, chronic, Confirmed +0% 16 Hepatitis C, chronic, Probable +0% 15 Hepatitis C, acute, Confirmed +0% 9 Hepatitis B, acute, Confirmed +0% 8 Hepatitis B, chronic, Probable -14% 6 Rare, severe & bioterrorism-watch
Other reportable diseases
Invasive pneumococcal disease, all ages, Confirmed +0% 28 Carbapenemase-Producing Organisms (CPO), Total +0% 21 Candida auris, screening +0% 15 Candida auris, clinical +0% 8 Coccidioidomycosis, Total +0% 6 Coccidioidomycosis, Probable +0% 5 Coccidioidomycosis, Confirmed +0% 3 Streptococcal toxic shock syndrome +0% 3 Invasive pneumococcal disease, age <5 years, Confirmed +0% 2 🗺️ Midwest region (IL/IN/MI/OH/WI) — 2026 week 41 13,435 reported cases (latest week)
7 diseases rising week-over-week
20 weeks of trend history shown
Foodborne & waterborne
Campylobacteriosis +0% 494 Salmonellosis (excluding Salmonella Typhi infection and Salmonella Paratyphi infection) +1% 370 Cryptosporidiosis +0% 261 Shiga toxin-producing Escherichia coli (STEC) +0% 122 Vibriosis (any species of the family Vibrionaceae, other than toxigenic Vibrio cholerae O1 or O139), Probable +8% 14 Vibriosis (any species of the family Vibrionaceae, other than toxigenic Vibrio cholerae O1 or O139), Confirmed +29% 9 Listeriosis, Confirmed +0% 8 Hepatitis A, Confirmed +0% 6 Vaccine-preventable
Measles, Indigenous +0% 66 Haemophilus influenzae, invasive disease, All ages, all serotypes +0% 39 Meningococcal disease, All serogroups +0% 6 Vector-borne (mosquito & tick)
Arboviral diseases, West Nile virus disease +0% 16 Arboviral diseases, La Crosse virus disease +0% 6 Sexually transmitted infections
Chlamydia trachomatis infection +0% 3,913 Syphilis, Primary and secondary -1% 66 Syphilis, Congenital +0% 9 Bloodborne hepatitis
Hepatitis C, chronic, Confirmed +0% 181 Hepatitis C, chronic, Probable -1% 107 Hepatitis B, chronic, Confirmed +0% 58 Hepatitis B, chronic, Probable -23% 53 Hepatitis C, acute, Confirmed +0% 12 Hepatitis B, acute, Confirmed +0% 11 Rare, severe & bioterrorism-watch
Other reportable diseases
Carbapenemase-Producing Organisms (CPO), Total +0% 140 Invasive pneumococcal disease, all ages, Confirmed +0% 122 Candida auris, screening +0% 89 Candida auris, clinical +0% 46 Coccidioidomycosis, Total +0% 8 Invasive pneumococcal disease, age <5 years, Confirmed +0% 7 Coccidioidomycosis, Probable +0% 6 Influenza-associated pediatric mortality +0% 5 🇺🇸 United States — 2026 week 41 62,063 reported cases (latest week)
14 diseases rising week-over-week
20 weeks of trend history shown
Foodborne & waterborne
Campylobacteriosis +0% 3,243 Salmonellosis (excluding Salmonella Typhi infection and Salmonella Paratyphi infection) +1% 2,551 Shiga toxin-producing Escherichia coli (STEC) +0% 698 Cryptosporidiosis +0% 604 Vibriosis (any species of the family Vibrionaceae, other than toxigenic Vibrio cholerae O1 or O139), Probable +1% 114 Vibriosis (any species of the family Vibrionaceae, other than toxigenic Vibrio cholerae O1 or O139), Confirmed +2% 84 Listeriosis, Confirmed +0% 32 Hepatitis A, Confirmed +0% 26 Vaccine-preventable
Measles, Indigenous +0% 256 Haemophilus influenzae, invasive disease, All ages, all serotypes +0% 220 Varicella disease +1% 164 Vector-borne (mosquito & tick)
Arboviral diseases, West Nile virus disease +3% 184 Dengue virus infections, Dengue +0% 154 Arboviral diseases, Chikungunya virus disease +0% 74 Sexually transmitted infections
Chlamydia trachomatis infection +0% 27,457 Syphilis, Primary and secondary -6% 534 Syphilis, Congenital +0% 69 Bloodborne hepatitis
Hepatitis C, chronic, Confirmed +0% 1,328 Hepatitis C, chronic, Probable +0% 764 Hepatitis B, chronic, Confirmed +0% 521 Hepatitis B, chronic, Probable +0% 472 Hepatitis C, acute, Confirmed +1% 106 Hepatitis B, acute, Confirmed +0% 63 Rare, severe & bioterrorism-watch
Other reportable diseases
Invasive pneumococcal disease, all ages, Confirmed +0% 884 Coccidioidomycosis, Total -0% 561 Coccidioidomycosis, Confirmed -0% 547 Carbapenemase-Producing Organisms (CPO), Total +0% 356 Candida auris, screening +0% 264 Candida auris, clinical +0% 213 Invasive pneumococcal disease, age <5 years, Confirmed +0% 28 Invasive pneumococcal disease, all ages, Probable +0% 26
Source: CDC NNDSS weekly tables (x9gk-5huc) — Indiana (state), Midwest (East North Central region) & U.S. total layers · trend sparklines span up to 20 weeks · page updated Oct 27, 2026, 7:44 AM. Factual surveillance data, not medical advice. Disease groupings (foodborne, vaccine-preventable, vector-borne, etc.) are a general-audience convenience, not a clinical classification.
