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ORPHA:1304

Brucellosis

low confidenceDisorder

Publications

33,161

Trials

2

Interventional, condition-specific

Researchers

1,095

Distinct authors in sample

Gene link

—

Readiness

2/6

Stages with a signal

Clinical definition (Orphanet)

Brucellosis is an anthropozoonotic infection, endemic in the Mediterranean region, the Middle East, Latin America and parts of Asia and Africa, that is caused by gram-negative coccobacilli of the genus Brucella transmitted through consumption of unpasteurized dairy products or through direct contact with infected animals, placentas or aborted fetuses. Brucellosis is characterized by fever, fatigue, malaise, headache, anorexia, weight loss, sweating, osteomuscular pain (joint and lumbar pain), and arthritis.

How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.

Orphanet entry

Cross-references

Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.

Additional Mondo synonyms (1)

undulant fever

Research stages

Trial readiness signals

Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”

2/6 stages with a signal

An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    33,161 matched papers (11,729 in last 10 years) Source

  3. Phenotype characterisedNot checked

    Not yet enriched from Monarch / HPO

  4. Animal modelNot checked

    Not yet enriched from Monarch / Alliance

  5. Orphan designationNot checked

    FDA/EMA orphan-drug designation not enriched yet

  6. Interventional trialPresent

    2 matched on ClinicalTrials.gov (1 recruiting in sample)

Biology

Genes and phenotypes

Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.

Do we know what causes it?

Not yet — the cause hasn't been pinned down in GenCC.

No strong gene–disease assertion joined for this Orphanet entity.

Phenotypes (Monarch / HPO)

Not enriched in this build — Monarch phenotype joins were not run for this record.

Animal models (Monarch / Alliance)

Not enriched in this build.

Literature

Is anyone studying this?

33,161

33,161 papers — among the better-studied rare conditions, though still a fraction of common-disease literature (breast cancer: over 700,000). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.

33,161 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 41 (publications denominator n=5449).

11,729 in the last 10 years · low confidence

Phrase hits: 33,161 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,095

Distinct author names in 200 sampled papers — named people below.

Who's working on it?

People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.

  1. 01
    Liu Z11 papers · 2026

    School of Public Health, Ningxia Medical University, Yinchuan, China.

    Papers in Europe PMC
  2. 02
    Li J9 papers · 2026

    Animal Disease Prevention and Control Center of Shilin Yi Autonomous County, Kunming, Yunnan, China.

    Papers in Europe PMC
  3. 03
    Li Z8 papers · 2026

    Branch of Biosafety, National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China, chinacdc.cn.

    Papers in Europe PMC
  4. 04
    Wang Y8 papers · 2026

    Department of Nephrology, The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, Gansu, China.

    Papers in Europe PMC
  5. 05
    Zhang S8 papers · 2026

    Department of Infectious Disease, Tianjin Second People's Hospital, Tianjin, China.

    Papers in Europe PMC
  6. 06
    Wang X7 papers · 2026

    Department of Infectious Diseases Jining Public Health Medical Center (Jining Fourth People's Hospital), Jining, China.

    Papers in Europe PMC
  7. 07
    Zhang X7 papers · 2026

    Jinzhou Center for Disease Control and Prevention (Jinzhou Health Supervision Institute), Jinzhou, 121000, Liaoning, China.

    Papers in Europe PMC
  8. 08
    Li Y6 papers · 2026

    Department of Infectious Disease, Tianjin Second People's Hospital, Tianjin, China.

    Papers in Europe PMC
  9. 09
    Wang F6 papers · 2026

    Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China.

    Papers in Europe PMC
  10. 10
    Zhang L6 papers · 2026

    Scientific Research Department, Inner Mongolia Fourth Hospital (Chest Hospital), Hohhot, China.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

2

interventional trials for this specific condition

2 interventional trials matched this specific condition name; 1 currently recruiting in our sample.

Data as of 27 July 2026

2 interventional trials — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 82.4th percentile).

low confidence · 82.4th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

2 interventional trials matched after quoted-phrase search and title/condition post-filter.

Observational and natural-history studies

6 observational studies match this condition. These do not test a treatment and are not counted in the interventional-trial headline, but they are genuine research: natural-history work often defines the endpoints needed for a future rare-disease trial, and families may be able to enroll.

Recruiting or not-yet-recruiting

Open the complete matched search on ClinicalTrials.gov

Where to find support

We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:

India — NPRD

Last verified 2026-07-26

This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.

Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.

How we counted this

Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.

"Brucellosis" OR "undulant fever"

Run this search on Europe PMC

ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):

"Brucellosis" OR "undulant fever"

Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).

Study-type breakdown: 2 interventional · 6 observational · 0 expanded access. Only interventional studies enter the trial headline.

Query health: ok — strategies attempted: phrase; with hits: phrase

Run this search on ClinicalTrials.gov

Confidence reasoning

  • Preferred label is short or not clearly distinctive
  • No synonyms dropped by stoplist
  • No label/synonym collisions with other diseases in this corpus
  • Publication count (33161) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity

Ingested 2026-07-26T16:58:49.409Z