QualTex Laboratories, a subsidiary of BioBridge Global (formerly known as South Texas Blood & Tissue Center), is one of the largest, independent nonprofit testing laboratories in the United States for biologic screening. Prior to becoming a separate business entity, QualTex existed as a strong business model with more than 35 years of testing experience as the testing laboratory services at South Texas Blood & Tissue Center. 
The laboratories have been ISO certified for more than 14 years and is currently ISO 9001:2008 compliant. 
QualTex Laboratories was established on Sept 1, 2007 as a 501(c) 3 corporation, a tax exempt subsidiary. 
The headquarters for QualTex Laboratories is located in San Antonio, Texas. A second facility was opened in April 2011 in Norcross, Georgia. The new testing facility doubles the testing capacity of the organization and fulfills backup testing requirements.