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Genetic research

Dental Clinic Outbreak in Tamil Nadu: 80% Fatality Rate Due to Neuromeloidosis

Strategic Insights

— 2 min read

An outbreak of neuromeloidosis, a bacterial infection of the brain, has claimed eight lives in Tirupattur district, Tamil Nadu, according to a study published in The Lancet. The outbreak is linked to unsterile dental practices at a clinic in Vaniyambadi town, where an unsterile surgical instrument was reused, contaminating saline and spreading the infection to at least 10 people. The fatality rate among those who visited the clinic was 80%, with symptoms including fever, headache, and slurred speech.

Key Takeaways:

  • The outbreak occurred between July 2022 and April 2023, with 21 cases of neuromeloidosis identified, including 10 patients who visited the dental clinic.
  • The fatality rate among patients who visited the dental clinic was 80%, compared to 9% among those who did not visit the clinic.
  • The infection was spread through the reuse of an unsterile surgical instrument, which was used to open a saline bottle and then loosely resealed.
  • The bacteria in the saline travelled directly along nerve pathways when used to clean patients' mouths during procedures, making the infection more severe.
  • Whole genome sequencing showed that the bacteria has a gene that aggressively attacks the brain.
  • The patients who succumbed after visiting the dental clinic had a quicker death, with an average time from symptom onset to death of 16 days, compared to 56 days for those not linked to the clinic.
  • State public health officials have taken corrective measures to stop the spread of the infection and are planning to use the study to identify similar cases and initiate micro-containment measures.
  • The study highlights the importance of infection control measures in healthcare settings.

Statistics:

  • 21 cases of neuromeloidosis were identified, including 10 patients who visited the dental clinic.
  • The fatality rate among patients who visited the dental clinic was 80%.
  • The fatality rate among patients who did not visit the dental clinic was 9%.
  • The average time from symptom onset to death for patients who visited the dental clinic was 16 days.
  • The average time from hospitalization to death for patients who visited the dental clinic was 9 days.
  • The average time from symptom onset to death for patients not linked to the dental clinic was 56 days.
  • The average time from hospitalization to death for patients not linked to the dental clinic was 38 days.

Sources:

  • The Lancet study by Dr. Angel Miraclin Thirugnanakumar et al. (no date)
  • CMC Vellore (no date)
  • ICMR-NIE (no date)
  • Tamil Nadu Directorate of Public Health (no date)
  • Dr. T S Selvavinayagam, Director of Public Health (no date)
  • Prabu Rajkumar, ICMR-NIE (no date)

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