An outbreak of human anthrax in Mysore (India)

R L Ichhpujani1, V Rajagopal, D Bhattacharya

  • 1National Institute of Communicable Diseases, Delhi.

Insights

A rare outbreak of intestinal anthrax, caused by Bacillus anthracis, resulted in four deaths within 72 hours after consuming diseased deer meat. This highlights the critical need for animal surveillance and intersectoral coordination to control anthrax.

Area of Science:

  • Zoonotic diseases
  • Infectious disease epidemiology
  • Microbiology

Background:

  • Anthrax, a zoonotic disease caused by Bacillus anthracis, is rare, particularly the intestinal form, which often has a fatal outcome.
  • A unique and fatal outbreak of intestinal anthrax occurred in a small hamlet in Mysore, Karnataka.
  • Four individuals died within 48-72 hours after consuming meat from a diseased deer.

Purpose of the Study:

  • To report and analyze a unique outbreak of intestinal anthrax.
  • To emphasize the diagnostic confirmation methods for Bacillus anthracis.
  • To highlight the importance of surveillance and intersectoral coordination in disease control.

Main Methods:

  • Diagnosis was confirmed by bacteriological culture isolation.
  • Biochemical tests were performed for identification.
  • Animal pathogenicity tests and Polymerase Chain Reaction (PCR) were utilized for confirmation.

Main Results:

  • Four cases of intestinal anthrax were confirmed.
  • The outbreak was linked to the consumption of diseased deer meat.
  • Rapid fatality occurred within 48-72 hours in the affected individuals.

Conclusions:

  • Intestinal anthrax, though rare, has a high fatality rate.
  • Effective control requires robust surveillance of anthrax in animals in endemic areas.
  • Intersectoral collaboration between health, animal husbandry, agriculture, and forest departments is essential for anthrax prevention and control.

Related Concept Videos

Inhalation Anthrax01:25

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...
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
Investigation of Disease Outbreaks01:23

Investigation of Disease Outbreaks

Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Smallpox01:24

Smallpox

Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
Toxoplasmosis01:28

Toxoplasmosis

Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...