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[A 14-year-old boy with painful oral lesions].

Ned Tijdschr Geneeskd

January 2025

Maasstad Ziekenhuis, afd. Kindergeneeskunde, Rotterdam.

This case concerns a boy presenting with oral pain and multiple mucocutaneous lesions such as mucositis, conjunctivitis, and a rash on the trunk, extremities, and genitalia. The presence of mild respiratory complaints raised suspicion of an extrapulmonary manifestation of , known as -induced Rash and Mucositis (MIRM). The patient underwent conservative treatment and was monitored to prevent chronic sequels such as ocular damage or sicca keratoconjunctivits.

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A 33-year-old female presented with coryzal symptoms, facial swelling, severe haemorrhagic stomatitis, blistering oral mucositis, conjunctival injection and a sparse targetoid rash on the back and face, requiring admission to hospital. She had received the seasonal influenza vaccination 3 days prior to feeling unwell. Differential diagnosis included erythema multiforme major (EMM) secondary to the influenza vaccine or Mycoplasma pneumoniae-induced rash and mucositis (MIRM).

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Suppressing neutrophil itaconate production attenuates Mycoplasma pneumoniae pneumonia.

PLoS Pathog

November 2024

Institute of Pathogenic Biology, School of Basic Medical Sciences, Hengyang Medical School, University of South China, Hengyang, Hunan, China.

Article Synopsis
  • Mycoplasma pneumoniae is a key cause of pneumonia, and itaconate, produced by neutrophils, has been identified as a pro-inflammatory metabolite during infection.
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Background: infections resurged globally in 2023-2024 after a three-year decline during the COVID-19 pandemic. We explored the incidence and severity of infections in children and adolescents before, during, and after the pandemic.

Methods: This nationwide, population-based cohort study included all Danish children and adolescents aged 0-17 years with a positive PCR test from May 1, 2016, to April 30, 2024.

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  • The review covers 30 years of research linking infections to chronic respiratory diseases like asthma, COPD, and bronchiectasis, particularly focusing on how infections contribute to these conditions.
  • Recent findings show that infections increase the risk of asthma flare-ups and may lead to bronchiectasis in certain individuals.
  • The article also discusses the immune system's role in chronic lung diseases, along with the challenges in diagnosing and treating these conditions while suggesting areas for future research.
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