Cicadas contain some of the smallest & complex Endosymbionts, which seem ro build antibacterial scaffolding cells, or even act as infecting Phage against larger bacteria.

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Replica molds of cicada wings give flight to possibilities of antibacterial surfaces

The spiky surface of cicada wings inspires researchers to create plastic or polymer surfaces that can kill antibiotic-resistant bacteria.

https://aip.scitation.org/doi/10.1063/10.0003061

Decoding the chemistry behind cicada’s bacteria-killing wings

Meticulously organised fatty acids are responsible for the bacteria-killing, superhydrophobic nanostructures on cicada wings.

https://www.chemistryworld.com/news/decoding-the-chemistry-behind-cicadas-bacteria-killing-wings/4011805.article