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<p>Phytonoses are diseases in humans that are transmitted from plants, with clinical reports documenting plant pathogens causing infections in immunocompromised individuals since the nineteenth century. In healthy individuals, these infections are usually localized, but in those with weakened immune systems, they can become widespread and life-threatening. This cross-kingdom transmission is rare due to the significant physiological differences between plants and animals. Plant pathogens must first overcome external barriers, such as the skin or mucosal layers, and then evade the host's immune defenses. While both plant and animal immune systems recognize and respond to pathogens, humans possess adaptive immunity in addition to innate immunity, whereas plants rely solely on innate immunity and lack circulating immune cells. A recent case in India of a 61-year-old man infected with <i>Chondrostereum purpureum</i>, a plant pathogen typically affecting the rose family, has drawn attention from both agricultural and medical researchers. This case highlights the need for further investigation into phytonoses, particularly in immunocompromised individuals, and calls for collaboration between plant pathology and medical sciences to address this emerging issue.</p>

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Phytonoses: A threat to immunocompromised humans?

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Rashmi Aggarwal,
  • Swagata Thakur,
  • Bishnu M. Bashyal,
  • Titiksha Aggarwal

摘要

Phytonoses are diseases in humans that are transmitted from plants, with clinical reports documenting plant pathogens causing infections in immunocompromised individuals since the nineteenth century. In healthy individuals, these infections are usually localized, but in those with weakened immune systems, they can become widespread and life-threatening. This cross-kingdom transmission is rare due to the significant physiological differences between plants and animals. Plant pathogens must first overcome external barriers, such as the skin or mucosal layers, and then evade the host's immune defenses. While both plant and animal immune systems recognize and respond to pathogens, humans possess adaptive immunity in addition to innate immunity, whereas plants rely solely on innate immunity and lack circulating immune cells. A recent case in India of a 61-year-old man infected with Chondrostereum purpureum, a plant pathogen typically affecting the rose family, has drawn attention from both agricultural and medical researchers. This case highlights the need for further investigation into phytonoses, particularly in immunocompromised individuals, and calls for collaboration between plant pathology and medical sciences to address this emerging issue.