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Condition (MeSH)

Streptococcal Infections

ClinicalTrials.gov lists 597 trials for Streptococcal Infections or a narrower condition beneath it. GlaxoSmithKline has the most among industry and government lead sponsors, with 75.

MeSH D013290 Infections C01
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Phase 1 Phase 1 68 Phase 1/2 Phase 1/2 19 Phase 2 Phase 2 69 Phase 2/3 Phase 2/3 6 Phase 3 Phase 3 155 Phase 4 Phase 4 60 Not applicable Not applicable 87 Observational Observational 133 Phase 1 Phase 1 68 Phase 1/2 Phase 1/2 19 Phase 2 Phase 2 69 Phase 2/3 Phase 2/3 6 Phase 3 Phase 3 155 Phase 4 Phase 4 60 Not applicable Not applicable 87 Observational Observational 133

Trials per phase (log scale)

143 of the 597 trials are tagged with Streptococcal Infections itself; the rest are tagged with a narrower condition beneath it.

Get the Streptococcal Infections report as a PDF

The PDF carries up to 50 rows of each section, where the page shows the first few, with the sources listed. Enter a work email and confirm it from the message we send, and the report follows by email.

When did Streptococcal Infections trials start? (30)

Shown in this order: most recent first, 1990 onwards. 2026 is partial: trials registered with a 2026 start date so far, not a full year. 3 trials are registered to start in 2027 or later, and not listed here.

Trials over time, by phase

  • Phase 1
  • Phase 1/2
  • Phase 2
  • Phase 2/3
  • Phase 3
  • Phase 4
  • Not applicable
  • Observational

Top of scale: 40

1993: 1 trials (Phase 2 1) 1995: 1 trials (Phase 3 1) 1997: 1 trials (Phase 4 1) 2000: 1 trials (Phase 2 1) 2001: 3 trials (Not applicable 1, Phase 4 1, Phase 3 1) 2002: 2 trials (Observational 1, Phase 1 1) 2003: 3 trials (Phase 4 1, Phase 1/2 1, Phase 1 1) 2004: 16 trials (Observational 4, Not applicable 1, Phase 4 3, Phase 2 2, Phase 1/2 3, Phase 1 3) 2005: 16 trials (Observational 3, Not applicable 1, Phase 4 3, Phase 3 7, Phase 2 1, Phase 1 1) 2006: 20 trials (Observational 6, Phase 4 1, Phase 3 12, Phase 1 1) 2007: 29 trials (Observational 2, Not applicable 3, Phase 4 1, Phase 3 14, Phase 2 3, Phase 1 6) 2008: 20 trials (Observational 6, Phase 4 2, Phase 3 7, Phase 2 3, Phase 1 2) 2009: 23 trials (Observational 4, Not applicable 1, Phase 3 13, Phase 2 3, Phase 1 2) 2010: 28 trials (Observational 6, Not applicable 2, Phase 4 7, Phase 3 4, Phase 2 5, Phase 1/2 1, Phase 1 3) 2011: 20 trials (Observational 5, Not applicable 2, Phase 4 1, Phase 3 5, Phase 2 3, Phase 1 4) 2012: 18 trials (Observational 4, Not applicable 1, Phase 4 2, Phase 3 4, Phase 2/3 2, Phase 2 5) 2013: 21 trials (Observational 4, Not applicable 3, Phase 4 6, Phase 3 3, Phase 2 2, Phase 1 3) 2014: 28 trials (Observational 5, Not applicable 6, Phase 4 2, Phase 3 5, Phase 2/3 1, Phase 2 6, Phase 1/2 3) 2015: 22 trials (Observational 6, Not applicable 6, Phase 4 1, Phase 3 3, Phase 2 3, Phase 1/2 2, Phase 1 1) 2016: 13 trials (Observational 4, Not applicable 2, Phase 4 3, Phase 3 1, Phase 1 3) 2017: 15 trials (Observational 3, Not applicable 3, Phase 4 2, Phase 3 1, Phase 2 4, Phase 1 2) 2018: 38 trials (Observational 7, Not applicable 8, Phase 4 1, Phase 3 11, Phase 2/3 1, Phase 2 7, Phase 1 3) 2019: 33 trials (Observational 7, Not applicable 4, Phase 4 2, Phase 3 13, Phase 2 2, Phase 1/2 2, Phase 1 3) 2020: 28 trials (Observational 10, Not applicable 1, Phase 4 2, Phase 3 10, Phase 2 2, Phase 1 3) 2021: 27 trials (Observational 10, Not applicable 4, Phase 4 5, Phase 3 5, Phase 2 1, Phase 1 2) 2022: 40 trials (Observational 10, Not applicable 8, Phase 4 4, Phase 3 12, Phase 2 3, Phase 1/2 1, Phase 1 2) 2023: 31 trials (Observational 7, Not applicable 4, Phase 4 2, Phase 3 5, Phase 2 4, Phase 1/2 2, Phase 1 7) 2024: 33 trials (Observational 6, Not applicable 12, Phase 3 4, Phase 2/3 1, Phase 2 4, Phase 1/2 1, Phase 1 5) 2025: 31 trials (Observational 6, Not applicable 7, Phase 4 2, Phase 3 3, Phase 2/3 1, Phase 2 3, Phase 1/2 2, Phase 1 7)

Trials registered with a start date in each year, 1990 onward, stacked by phase (complete years only; the current partial year is in the table's notes). The table below lists the same counts, most recent years first.

Trials started per year
Year Trials started
2026 (partial year) 27
2025 31
2024 33
2023 31
2022 40
2021 27
2020 28
2019 33
2018 38
2017 15

Forecast of the full-year count, planned starts included, not rows of this table: about 35 trials starting in 2026 and about 34 in 2027, the average of the 24 months through September, counted as registered and carried forward, with about 0.7 times the starts already registered for the rest of 2026 added. The rows of this table count trials registered so far with a start date in the year, planned starts included; the forecast looks ahead to the count for the whole year, so it is not the same measure. In backtests on conditions of this size, forecasts made part-way through the year were typically off by about 15 percent and ran about 1 percent high against the count later registered; forecasts made before the year began were off by about 26 percent and ran about 20 percent low against the count later registered. The part-way figures are from forecasts that used a multiple fitted only on earlier years. These figures rest on a few years of history (target years from 2018 to 2025, varying by figure), place each condition as it is mapped today rather than as it was then, and score against a count for the newest year that was still being revised. Only condition series were scored.

Prediction, not a registry value: median of 28 months from start to primary completion across 46 trials still running at the 2026-10-09 snapshot; registered median of 14 months across 417 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Streptococcal Infections trials in? (8)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 68
Phase 1/2 19
Phase 2 69
Phase 2/3 6
Phase 3 155
Phase 4 60
Not applicable 87
Observational 133

How many Streptococcal Infections trials are recruiting? (9)

Shown in this order: the order a trial moves through, from not yet recruiting to unknown.

Trials by recruitment status
Status Trials
Not yet recruiting 22
Recruiting 48
Enrolling by invitation 1
Active, not recruiting 28
Completed 409

Status as registered on ClinicalTrials.gov. Each trial is counted once.

Which lead sponsors run the most Streptococcal Infections trials? (9)

Shown in this order: most trials first. Lead sponsors the registry classes as industry, NIH, US federal, other government or network. A hospital or university the registry files as government can appear here. Sponsors it classes as academic or other are shown on the full page, because that class cannot separate an institution from a named investigator.

Lead sponsors
Sponsor Trials
GlaxoSmithKline 75
Pfizer 64
Merck Sharp & Dohme LLC 46
Wyeth is now a wholly owned subsidiary of Pfizer 16
National Institute of Allergy and Infectious Diseases (NIAID) 10

Interventions as named in the registry (15)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
PREVNAR 13 29
VACCINE: 13-valent pneumococcal conjugate vaccine 26
PNEUMOVAX 24
V114 20
InfanrixTM hexa 18

These are the names sponsors entered on ClinicalTrials.gov that we have not matched to a single molecule. Some are drugs under a brand or code name; others are procedures, doses or arm labels.

Which serious adverse events do Streptococcal Infections trials report? (10)

Shown in this order: most subjects affected first. Subjects affected summed across trials, a cross-trial signal, not a rate.

Serious adverse events in this condition's trials
Adverse event Subjects affected Trials
Gastroenteritis 1,508 57
Pneumonia 1,499 69
Bronchiolitis 1,485 45
Dehydration 988 31
Bronchitis 479 36

Which publications cover Streptococcal Infections? (390)

Shown in this order: major-topic papers first, then newest, then most linked to trials.

Sub-conditions in MeSH (6)

MeSH descendants one level down with at least one trial, most trials first.

Not on this page

Not measured: delivery record.

Checked, with nothing recorded for this condition: prevalence and rare-disease identity.

Browse all condition evidence pages