Final answer:
For cellulitis due to a bite, the first-line treatment is typically antibiotics, with penicillin often prescribed for streptococcal infections.
Step-by-step explanation:
The recommended first-line treatment for cellulitis resulting from a bite is usually a course of oral or intravenous antibiotics. In cases where the specific type of bacteria is known, such as a streptococcal infection, penicillin is commonly prescribed because of its effectiveness and the low level of resistance found in these bacteria. If the bite could have included anaerobes or unusual flora, broader spectrum antibiotics or those targeting specific pathogens might be indicated. The area of the bite should also be disinfected properly to prevent further infection.