Which microbial agent is effective against yeast?

The correct response highlights the role of fungicides as agents specifically designed to target and eliminate fungi, which include yeasts. Yeasts are a type of fungus and can be responsible for various infections and spoilage processes. Fungicides work by disrupting critical cellular processes or structures within fungi, leading to their death or inhibition of growth.

In contrast, virucides are designed to inactivate viruses, without any effect on fungal species like yeast. Germicides, while effective against a broad range of microorganisms, do not specifically target yeasts as their primary function and may not effectively eliminate fungal strains. Antibacterial agents specifically combat bacteria, lacking activity against fungi, including yeasts. This specificity is what makes fungicides the appropriate choice for targeting yeast and provides clarity on their functional role in managing microbial threats.