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Inhalation Anthrax

Inhalation Anthrax

Anthrax is a zoonotic disease caused by Bacillus anthracis, a Gram-positive, spore-forming bacterium. It primarily affects herbivorous animals but can be transmitted to humans through skin contact, ingestion, or inhalation of spores.Cutaneous anthrax, the most common form, typically results from direct contact with bacterial spores through skin abrasions and is generally less severe. Gastrointestinal anthrax results from eating undercooked or contaminated meat. It affects the mouth, throat, or...

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Protective Efficacy and Pulmonary Immune Response Following Subcutaneous and Intranasal BCG Administration in Mice

Protective Efficacy and Pulmonary Immune Response Following Subcutaneous and Intranasal BCG Administration in Mice

Published on: September 19, 2016

Interferon protects mice against inhalation anthrax.

Kristin Walberg¹, Samuel Baron, Joyce Poast

¹Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas 77555-1070, USA.

Journal of Interferon & Cytokine Research : the Official Journal of the International Society for Interferon and Cytokine Research

|September 10, 2008

Summary

Type I interferons (IFNs) protect mice against lethal inhalational anthrax. Intranasal administration of the IFN inducer Poly-ICLC demonstrated significant protection, suggesting a potential therapy for human anthrax.

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Area of Science:

Immunology
Infectious Diseases
Microbiology

Background:

Interferons (IFNs) are crucial for innate immunity against various pathogens.
Bacillus anthracis (anthrax) poses a bioterrorism threat, necessitating alternative treatments beyond antibiotics.
Both antibodies and IFNs are being investigated as potential anthrax therapies.

Purpose of the Study:

To investigate the efficacy of type I interferons (IFNs) in protecting against lethal inhalational anthrax.
To determine if IFN-mediated protection against Bacillus anthracis can be achieved in vivo.

Main Methods:

Mice were treated with Poly-ICLC, a type I IFN inducer, and challenged with Bacillus anthracis.
Recombinant murine IFN-beta was used to confirm IFN-mediated protection.
IFN type I receptor knockout mice were used to assess the role of the IFN receptor.

Main Results:

Intranasal Poly-ICLC treatment strongly and rapidly protected mice against lethal inhalational anthrax.
Protection was confirmed to be IFN-mediated, as recombinant IFN-beta also conferred protection.
Protection was abrogated in IFN type I receptor knockout mice, highlighting the pathway's importance.
Intranasal administration provided the greatest protection, with intramuscular treatment showing only a slight delay in mortality.

Conclusions:

Type I interferons, particularly when administered intranasally via Poly-ICLC, offer significant protection against lethal inhalational anthrax in mice.
This IFN-mediated defense mechanism holds promise for the development of novel human anthrax therapies.