I don't know if it is becoming 'more common', but that story is typical. The bacteria is on our skin, and a kid scratching a bite raw opens the skin and the bacteria slips right in! Neosporin is a good thing!
I read a study not too long ago where asymptomatic volunteers had a swabbed sample taken from their throat. These samples were then grown in culture. After they had provided their sample, they were given a short course of antibiotics (can't remember which one), perhaps 5 days worth. After the antibiotic regimen was complete, cultures were again obtained and compared to the originals. There was a surprising bump in the number of antibiotic resistant bugs after this! So even a seemingly benign treatment can create problems, potentially.
Antibiotic resistance depends on the mechanism the drug uses to kill bacteria.
OK, not to get too eggheadish, but cephalosporins like cefzil and beta lactams (good old penicillins) both work in a similar manner in attacking the bacteria's cell membrane. Augmentin is amoxicillin (a beta lactam) combined with clavulanic acid. Many of the bugs that have gained resistance to b-lactams have done so by 'learning' how to produce an enzyme that breaks down the b-lactam before it can work (beta lactamase). The clavulanic acid in augmentin simply counteracts b-lactamase so the b-lactam can do it's job. So I think using augmentin will not have an effect on creating resistance to some cephalosporins, but not vice-versa. We might ask Audie or
Cork, they are the pharmacists and I am digging deep to remember this stuff!