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Safety and Clinical Outcomes of an Equine-derived Heptavalent Botulinum Antitoxin Treatment for Confirmed or Suspected Botulism in the United States.

Abstract: Botulism is a rare, life-threatening paralytic illness. Botulism Antitoxin Heptavalent (A,B,C,D,E,F,G)-(Equine) (BAT) manufactured by Emergent BioSolutions Canada Inc is an equine-derived heptavalent botulinum antitoxin product indicated for the treatment of symptomatic botulism following documented or suspected exposure to botulinum neurotoxin serotypes A-G in adults and pediatric patients. BAT product was US-licensed in 2013. In the United States, from October 2014 through July 2017, safety and clinical outcomes data were collected under a registry for patients treated with BAT product. Registry patients had a median age of 51 years (range, 32 days to 92 years). Among 162 patients, 7 (4.3%) experienced BAT product-related serious adverse events, including 1 (0.6%) report each of pneumonia, pneumonia aspiration, ventricular tachycardia, upper gastrointestinal hemorrhage, anaphylactic reaction, acute kidney injury, and acute myocardial infarction. Thirty-one (19.1%) patients had 41 BAT product-related adverse events. Six (3.7%) deaths were reported in the registry. All deaths were attributed to the underlying illness and were assessed as unlikely related to BAT product. Among 113 (69.8%) patients with a final diagnosis of botulism, those treated early (≤2 days) spent fewer days in the hospital (5 vs 15.5 days), in the intensive care unit (ICU) (4 vs 12 days), and on mechanical ventilation (6 vs 14.5 days) than those treated late (>2 days), respectively. BAT product was well tolerated in patients. Treatment with BAT product at ≤2 days of symptom onset was associated with shorter hospital and ICU stays, and shorter duration and need for mechanical ventilation, showing clinical benefit associated with early treatment.
Publication Date: 2019-06-19 PubMed ID: 31209461DOI: 10.1093/cid/ciz515Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • U.S. Gov't
  • P.H.S.

Summary

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The research article discusses the safety and treatment outcomes of an antitoxin, specifically developed for botulism, a rare but severe paralytic illness. The product, manufactured by Emergent BioSolutions, has been used on patients in the United States, and the article presents data collected over a span of three years, highlighting the efficacy and adverse reactions to the treatment.

Safety outcomes with the Botulism Antitoxin

  • Among 162 patients, 7 or 4.3% experienced serious adverse events related to the Botulism Antitoxin (BAT) product. These adverse events include pneumonia, pneumonia aspiration, ventricular tachycardia, upper gastrointestinal hemorrhage, anaphylactic reaction, acute kidney injury, and acute myocardial infarction.
  • Overall, 31 patients (19.1%) had a total of 41 BAT product-related adverse events.
  • However, the BAT was generally well tolerated among patients despite these adverse events.

Death incidences and link to the BAT product

  • Of the 162 patients, there were 6 reported deaths (3.7%).
  • However, it was noted that these deaths were not directly linked to the use of the BAT but were rather attributed to the patients’ underlying illnesses.

Effectiveness of early treatment with the BAT product

  • Data showed that patients diagnosed with botulism who received BAT treatment early (within 2 days of symptom onset) experienced shorter hospital stays, shorter durations in the Intensive Care Unit (ICU), and less time on mechanical ventilation.
  • Specifically, patients who were treated early spent five days in the hospital compared to 15.5 days for those treated late; four days in the ICU versus 12 days for later treatments, and were on mechanical ventilation for six days versus 14.5 days for later treatments.
  • This finding supports the clinical benefits associated with early treatment using the BAT product.

Cite This Article

APA
Richardson JS, Parrera GS, Astacio H, Sahota H, Anderson DM, Hall C, Babinchak T. (2019). Safety and Clinical Outcomes of an Equine-derived Heptavalent Botulinum Antitoxin Treatment for Confirmed or Suspected Botulism in the United States. Clin Infect Dis, 70(9), 1950-1957. https://doi.org/10.1093/cid/ciz515

Publication

ISSN: 1537-6591
NlmUniqueID: 9203213
Country: United States
Language: English
Volume: 70
Issue: 9
Pages: 1950-1957

Researcher Affiliations

Richardson, Jason S
  • Clinical Research Department, Emergent BioSolutions Canada, Inc., Winnipeg.
Parrera, Geraldine S
  • Pharmacovigilance Department, Emergent BioSolutions Canada, Inc., Winnipeg.
Astacio, Hugo
  • Pharmacovigilance Department, Emergent BioSolutions Canada, Inc., Winnipeg.
Sahota, Harpreet
  • Biostatistics Department, Emergent BioSolutions Canada, Inc., Winnipeg.
Anderson, Deborah M
  • Biostatistics Department, Emergent BioSolutions Canada, Inc., Winnipeg.
Hall, Christine
  • Clinical Research Department, Emergent BioSolutions Canada, Inc., Winnipeg.
Babinchak, Tim
  • Medical Affairs Department, Emergent BioSolutions, Inc., Gaithersburg, Maryland.

MeSH Terms

  • Adult
  • Animals
  • Botulinum Antitoxin / therapeutic use
  • Botulinum Toxins
  • Botulism / diagnosis
  • Botulism / drug therapy
  • Canada
  • Child
  • Horses
  • Humans
  • Time Factors
  • United States

Citations

This article has been cited 21 times.
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