Clinical trialNCT00690092CompletedPhase 3Interventional

A Multi-center Study of Spherule-Derived Coccidioidin

SponsorNielsen BioSciences, Inc.Enrollment113Coccidioidomycosis

View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

Adult volunteers were skin tested with 1.27 ug spherule-derived coccidioidin. The skin test antigen was evaluated in three different populations of adult volunteers to determine the safety and efficacy of the product in the assessment of delayed-type hypersensitivity to Coccidioides immitis. Induration greater than or equal to 5 mm after 48 hours was considered positive for exposure to C. immitis.

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Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

Brad Sawtelle, M.D.
Blair, NE
Principal Investigator
clinicaltrials.gov ↗
Harry S Nielsen, Ph.D.
Nielsen BioSciences, Inc.
Study Director
clinicaltrials.gov ↗
Neil Ampel, M.D.
University of Arizona, Tucson
Principal Investigator
clinicaltrials.gov ↗
Royce Johnson, M.D.
Kern Medical Center
Principal Investigator
clinicaltrials.gov ↗
Stephen Kernerman, D.O.
Spokane, WA
Principal Investigator
clinicaltrials.gov ↗

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

4 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States

Health Sciences Center Avahcs, Univ. of Arizona
Tucson, Arizona, United States
Kern Facility Medical Group
Bakersfield, California, United States
Blair Clinic
Blair, Nebraska, United States
Spokane Allergy and Asthma Center
Spokane, Washington, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

Spherule-derived coccidioidin

Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start: 31 May 2005
Primary completion: 30 Sept 2007
Completion: 30 Sept 2007
Last update posted: 29 Oct 2013
Registered enrollment: 113
Registry id: NCT00690092

clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.