Use of Botulism Antitoxin Heptavalent (A, B, C, D, E, F, G)-(Equine) (BAT®) in Clinical Study Subjects and Patients: A 15-Year Systematic Safety Review

Geraldine S Parrera, Hugo Astacio, Priya Tunga, Deborah M Anderson, Christine L Hall, Jason S Richardson, Geraldine S Parrera, Hugo Astacio, Priya Tunga, Deborah M Anderson, Christine L Hall, Jason S Richardson

Abstract

Botulism is a rare, sometimes fatal paralytic illness caused by botulinum neurotoxins. BAT® (Botulism Antitoxin Heptavalent (A, B, C, D, E, F, G)-(Equine)) is an equine-derived heptavalent botulinum antitoxin indicated for the treatment of symptomatic botulism in adult and pediatric patients. This review assesses the cumulative safety profile for BAT product from 2006 to 2020, using data received from clinical studies, an expanded-access program, a post-licensure registry, spontaneous and literature reports. The adverse event (AE) incidence rate for BAT product was calculated conservatively using only BAT product exposures for individuals with a record (512) and was alternatively estimated using all BAT product exposure data, including post-licensure deployment information (1128). The most frequently reported BAT product-related AEs occurring in greater than 1% of the 512-1128 BAT product-exposed individuals were hypersensitivity, pyrexia, tachycardia, bradycardia, anaphylaxis, and blood pressure increase reported in 2.3-5.1%, 1.8-3.9%, 1.0-2.2%, 0.89-2.0%, 0.62-1.4%, and 0.62-1.4%, respectively. For patients properly managed in an intensive care setting, the advantages of BAT product appear to outweigh potential risks in patients due to morbidity and mortality of botulism. AEs of special interest, including bradycardia, hemodynamic instability, hypersensitivity, serum sickness, and febrile reactions in the registry, were specifically solicited.

Keywords: BAT product; Botulism Antitoxin Heptavalent; botulism; equine-derived; safety review.

Conflict of interest statement

All authors have submitted the Multidisciplinary Digital Publishing Institute (MDPI) Form for Disclosure of Potential Conflicts of Interest.

Figures

Figure 1
Figure 1
Preferred reporting items for systematic reviews and meta-analyses (PRISMA) flow diagram for literature articles reporting adverse events to BAT product (2005–2020).
Figure 2
Figure 2
Preferred reporting items for systematic reviews and meta-analyses (PRISMA) flow diagram: total BAT product exposures and incidence of related AEs/SAEs.
Figure 3
Figure 3
Adverse reaction algorithm was used for the evaluation of adverse events of special interest. Signs and/or symptoms of each AESI (bradycardia, hemodynamic instability, hypersensitivity, serum sickness, and febrile reactions) were defined in the algorithm. Cases of hypersensitivity were further classified as anaphylaxis based on its severity and progression.

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Source: PubMed

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