| Organisms Affected | Antibiotic | Method of Delivery |
| Same as azithromycin (respiratory pathogens) | |
| Gram – rods including Pseudomonas (but there is increasing resistance to it), B. Anthracis (anthrax), STDs (NOT syphillis or gonorrhea) | |
| Gram - spectrum | |
| Broad Spectrum Activity | |
| Streptococci, Treponema, Oral Anaerobes, Haemophilus, Listeria | |
| Group A Streptococci, Treponema (syphilis) | |
| Enteric GNR, Pseudomonas | |
| Broad Spectrum, Much less resistance, Does not treat pseudomonas | |
| Staphylococci only! | |
| Streptococci, Staphylococci, Enteric GNR | |
| Respiratory Gram +, Mycoplasma, Chlamydia, Legionella (intracellular pathogens), Helicobacter/Campilobacter (Gram -) | |
| GNR not anaerobes (includes situations where the environment is anaerobic like intra-abdominal abscesses), Pseudomonas | |
| Streptococci, Treponema, Oral Anaerobes, Haemophilus, Listeria, Enteric GNR, Pseudomonas | |
| Intrcellular Bacteria, Staphylococci | |
| Streptococci, Staphylococci, Enteric GNR | |
| Staphylococci only! | |
| Used primarily in multi-drug resistant Tuberculosis | |
| Streptococci, Staphylococci, Enteric GNR, Acinetobacter, Pseudomonas, Anaerobes | |
| Gram +, C. difficile | |
| More potent against Gram +, Less potent against Gram - , More Anaerobes (oral) | |
| Streptococci, Staphylococci, Enteric GNR, Anaerobes | |
| Streptococci, Treponema, Oral Anaerobes, Haemophilus, Listeria, Enteric GNR, Pseudomonas | |
| Broad Spectrum, Lots of resistance | |
| Streptococci, Staphylococci, Enteric GNR, Acinetobacter, Pseudomonas, Anaerobes | |
| Anaerobes, C difficile, Amoebae(Giardia, Entamoeba, Trichimonas) | |
| GNR not anaerobes (includes situations where the environment is anaerobic like intra-abdominal abscesses), Pseudomonas | |
| Very good against Gram + including Staph | |
| Streptococci, Staphylococci, Enteric GNR | |
| | Organisms Affected | Antibiotic | Method of Delivery |
| Good for streptococcal infections, Gram – and Pseudomonas, Mycoplasma/Chlamydia/Legionella (good for respiratory pathogens) | |
| Gram - NOT including Proteus or Pseudomonas, Useful for enterococcus (especially vancomycin resistant infections) | |
| Streptococci, Staphylococci, Enteric GNR | |
| Erythyromycin + (less resistant), Atypical Mycobacteria infections (not TB) | |
| Anaerobic GNR, Enteric GNR, Pseudomonas, Acinetobacter | |
| Multi-drug resistant GNR | |
| Broad (does not include Strep or Pseudomonas), | |
| Gram + spectrum (especially resistant ones), but NOT E. faecalis (Enterococcus | |
| Broad Spectrum , Intracellular Bacteria | |
| Streptococci, Staphylococci, Enteric GNR, Haemophilus | |
| Broad spectrum covering staph and mycobacterium | |
| Vancomycin resistant Gram + | |
| Enteric GNR, Pseudomonas | |
| Gram +, abx resistant bacteria: MRSA, Vancomycin-resistant Enterococcus faecium, but not E.faecalis | |
| M. tuberculosis. F. tularensis, Yersinis pestis | |
| Streptococci, Staphylococci, Enteric GNR | |
| Broad spectrum for gram positive and gram negative organisms in the urinary tract | |
| Same as clarithromycin, but particulary effective for those with Chlamydia infection | |
| Streptococci, Staphylococci, Enteric GNR, Anaerobes | |
| Kills gram positive organisms | |
| Staphylococci only! | |
| Gram positive spectrum – can be used to treat organisms that are resistant to β-lactams and glycopeptides, Resistant Gram +, VR-MRSA | |
| Streptococci, Staphylococci, Enteric GNR, Acinetobacter, Pseudomonas, Anaerobes | |
| Oral Anaerobes | |
| C. difficile, Vancomycin resistant Enterocicci | |
| Streptococci, Staphylococci, Enteric GNR, Anaerobes | |
| Gram + (strep and staph), Anaerobic organisms | |
| Vancomycin resistant Gram + | |
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