 The use of fungi as reducing agents in the biogenic synthesis of silver nanoparticles is attractive due to its ability to produce large quantities of proteins, high yields, easy handling, low toxicity, and potential for biological activity. Fungal species can produce nanoparticles with different characteristics, and the synthesis mechanisms are not yet fully understood. The synthesis can be optimized by adjusting parameters such as temperature, pH, silver precursor concentration, biomass amount, and fungus cultivation time. Silver nanoparticles synthesized using fungi have potential for use as antimicrobials in health and agriculture. This article was authored by Mariana Guilcher-Casagrande and Renata Dalima.