Workers at a biodefense laboratory at the University of Texas Health Science Center at Houston were exposed to anthrax, in aerosol form, in April. That same month, workers sent to fix malfunctioning air filters at the University of Texas at San Antonio entered a lab containing tularemia bacteria without wearing gloves or respiratory protection, according to the Sunshine Project, a watchdog group on biological-weapons research.

The universities reported both incidents to the Centers for Disease Control and Prevention, complying with federal policy, and no one was infected with the dangerous microbes. But the accidents drew attention because they followed the recent disclosure that two other Texas universities had failed to report laboratory mishaps involving infectious bacteria.

The University of Texas at Austin revealed last week that it had failed to report 10 laboratory accidents to federal authorities over the past seven years. At Texas A&M University at College Station, the safety and security violations were so numerous that the CDC suspended the university’s research on microbes used in biological weapons. —Matt Petrie