feedback5="'''Incorrect''' Fifth generation cephalosporins have only recently been developed and there are no veterinary examples. Cefalexin is a first generation cephalosporin, it is active against gram positive organisms and many gram negatives, although Pseudomonas species are resistant. [[Cephalosporins#Spectrum of Activity|cephalosporins.]]" | feedback5="'''Incorrect''' Fifth generation cephalosporins have only recently been developed and there are no veterinary examples. Cefalexin is a first generation cephalosporin, it is active against gram positive organisms and many gram negatives, although Pseudomonas species are resistant. [[Cephalosporins#Spectrum of Activity|cephalosporins.]]" |