Q.Name any two species of fungus, which are used in the production of the antibiotics.

Fungi have been central to the discovery and industrial production of antibiotics. The best-known example is Penicillium notatum (now classified as Penicillium chrysogenum), the mould Alexander Fleming found inhibiting bacterial growth in 1928 -- the source of penicillin, the first true antibiotic and the drug that transformed the treatment of bacterial infections. The second textbook example is Cephalosporium acremonium, a fungus isolated from sewage water off the Sardinian coast in 1948, which produces the cephalosporins -- a related family of antibiotics effective against bacteria that resist penicillin, and a vital option for patients allergic to penicillin itself. …

The discovery that certain fungi could kill bacteria opened one of the most transformative chapters in medical history. Before antibiotics, a simple wound infection could prove fatal, and diseases like pneumonia or tuberculosis were death sentences for millions. The realization that microorganisms themselves could be harnessed to fight infection changed everything.

The story begins with Penicillium notatum, the mold Alexander Fleming famously stumbled upon in 1928 when a contaminated petri dish revealed a clear zone where bacteria couldn't grow. This species produces penicillin, the first true antibiotic to be mass-produced and used clinically. Later, scientists found that a related species, Penicillium chrysogenum, yielded even higher quantities of penicillin and became the industrial workhorse for production. The fungus secretes penicillin as a secondary metabolite—essentially a chemical weapon in its own microscopic battles—which we've co-opted to treat bacterial infections in humans.

The second major fungal antibiotic producer is Cephalosporium acremonium. Isolated from sewage water near the Sardinian coast in 1948, this fungus produces cephalosporins, a family of antibiotics structurally related to penicillin but with a broader spectrum of activity and greater resistance to bacterial enzymes that break down penicillin. Cephalosporins became crucial alternatives for patients allergic to penicillin and for treating infections caused by bacteria that had developed resistance. …

Anchor on the drug each fungus is remembered for, not the species name alone -- pair Penicillium notatum with penicillin and Cephalosporium acremonium with cephalosporins, so the answ …