Bacterial Infections in Ball Pythons

Reptile · Python regius · typical adult weight 1.00–2.00 kg

8 cited drugs treat Bacterial Infections in ball pythons: Amoxicillin, Ampicillin, Ceftiofur Crystalline Free Acid, Chloramphenicol, Enrofloxacin, Marbofloxacin, Oxytetracycline, Trimethoprim.

General coverage of susceptible bacterial pathogens. Drug selection turns on the suspected organism's gram-stain, the patient's species (oral β-lactams unsafe in rabbits/guinea pigs), and the infection site (penetration to bone, CSF, or biliary tree).

The overview above describes Bacterial Infections across species; the citations below are the ExoticRx dose rules scoped to ball pythons — a reference list, not new species-specific clinical guidance.

Amoxicillin(Amoxi-Tabs, Amoxil)

Antibiotic

Route	Dose	Frequency	Indication	Evidence	Source
PO	22 mg/kg	q12-24h	Susceptible bacterial infection	Weak	Divers SJ. Empirical doses of antimicrobial drugs commonly used in reptiles. Exot DVM. 1998;1:23. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.212 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929
PO, IM	5–10 mg/kg	q12-24h	Susceptible bacterial infection	Moderate	Hedley J. BSAVA Small Animal Formulary: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, UK; 2020. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.212 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712; Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

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Ampicillin(Polyflex)

Antibiotic

Route	Dose	Frequency	Indication	Evidence	Source
SC, IM	10–20 mg/kg	q12h	Susceptible bacterial infection	Moderate	Hedley J. BSAVA Small Animal Formulary: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, UK; 2020. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.212 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712; Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

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Ceftiofur Crystalline Free Acid(Excede)

Antibiotic

Route	Dose	Frequency	Indication	Evidence	Source
IM	15 mg/kg	q24-120h (interval based on MIC)	Susceptible bacterial infection (long-acting depot)	Weak	Adkesson MJ, Fernandez-Varon E, Cox S, et al. Pharmacokinetics of a long-acting ceftiofur formulation (ceftiofur crystalline free acid) in the ball python (Python regius). J Zoo Wildl Med. 2011;42:444-450. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.214 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

Full Ceftiofur Crystalline Free Acid dosing in Ball Pythons →Calculate for this ball python →

Chloramphenicol

Antibiotic

Route	Dose	Frequency	Duration	Indication	Evidence	Source
SC	40 mg/kg	q24h	7-14 days	Bacterial infections	Extrapolated	Funk RS. A formulary for lizards, snakes, and crocodilians. Vet Clin North Am Exot Anim Pract. 2000;3:333-358. / 243. Klaphake E, Gibbons PM, Sladky KK, et al. Reptiles. In: Carpenter JW, eds. Exotic Animal Formulary, 5th ed., Elsevier, St. Louis, MO; 2018:81-166. doi:10.1016/s1094-9194(17)30105-6 — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.214 (2026-08-01). — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

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Enrofloxacin(Baytril)

Antibiotic

Route	Dose	Frequency	Duration	Indication	Evidence	Source
IM	5–10 mg/kg	q24h	7-14 days	Bacterial infections (pneumonia, abscess)	Weak	Mader's Reptile & Amphibian Medicine and Surgery, Table 72.1 'Drugs Commonly Used to Treat Mycoplasmosis in Reptiles', corpus p.878 (printed 747); also Mader's Table 127.1, corpus p.1402: 'Enrofloxacin 5-10 mg/kg q24h PO, SC, IM, ICe - Most species' — SOURCE EDITION: Mader's Reptile and Amphibian Medicine and Surgery (Divers & Stahl) — ISBN 9780323482530, https://openlibrary.org/isbn/9780323482530
PO	5–10 mg/kg	q48h	14-21 days	Bacterial infections	Extrapolated	White SD, Bourdeau P, Bruet V, et al. Reptiles with dermatological lesions: a retrospective study of 301 cases at two university veterinary teaching hospitals (1992-2008). Vet Dermatol. 2010;22:150-161. doi:10.1111/j.1365-3164.2010.00926.x — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.215 (2026-08-01). — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929
SC	5–10 mg/kg	q24-48h	7-14 days	Bacterial infections	Moderate	Divers SJ, Stahl SJ (eds), Mader's Reptile and Amphibian Medicine and Surgery, 3rd ed., Elsevier 2019 - reptile formulary table: 'Enrofloxacin \| 5-10 mg/kg q24h PO, SC, IM, ICe99 \| Most species/IM administration is painful and may result in tissue necrosis and sterile abscesses, may cause skin discoloration or tissue necrosis if given SC, to administer SC dilute with sterile NaCl'. Carpenter's Table 4.1 prints NO 5-10 mg/kg row for any reptile and NO SC row for any snake.

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Marbofloxacin(Zeniquin)

Antibiotic

Route	Dose	Frequency	Indication	Evidence	Source
PO	10 mg/kg	q48h	Susceptible gram-negative bacterial infection	Weak	Coke RL, Isaza R, Koch DE, et al. Preliminary single-dose pharmacokinetics of marbofloxacin in ball pythons (Python regius). J Zoo Wildl Med. 2006;37:6-10. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.217 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — CORROBORATED 2026-08-06 by independent literature: Preliminary single-dose pharmacokinetics of marbofloxacin in ball pythons (Python regius). (Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians, 2006). doi:10.1638/04-102.1. https://doi.org/10.1638/04-102.1. The paper reports this drug at this dose in this species: "adult ball pythons (Python regius) was determined after i.v. and p.o. administration of a single […]". This is a second source alongside the book already cited; it corroborates the figure and does not by itself establish that the dose is correct. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

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Oxytetracycline(Terramycin, Liquamycin)

Antibiotic

Route	Dose	Frequency	Indication	Evidence	Source
PO, IM, IV	6–10 mg/kg	q24h	Susceptible bacterial infection	Weak	Divers SJ. Empirical doses of antimicrobial drugs commonly used in reptiles. Exot DVM. 1998;1:23. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.218 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

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Trimethoprim(Tribrissen)

Antibiotic

Route	Dose	Frequency	Duration	Indication	Evidence	Source
PO	15–25 mg/kg	q24-48h	7-14 days	Bacterial infections	Weak	Mader's Table 127.1, corpus p.1404 (printed 1194); Plumb's Sulfa-/Trimethoprim REPTILES, corpus p.1223, incl. 'may consider giving dose every other day after the second dose' — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207; Mader's Reptile and Amphibian Medicine and Surgery (Divers & Stahl) — ISBN 9780323482530, https://openlibrary.org/isbn/9780323482530

Full Trimethoprim dosing in Ball Pythons →Calculate for this ball python →

All drugs cited for Bacterial Infections →All drugs for Ball Pythons →

Other conditions in Ball Pythons

Sedation Respiratory Infections Endoparasites Pain Management Systemic Fungal Infections General Anesthesia Cryptosporidiosis Coccidiosis

Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice. Verify against current literature before clinical use.