Sporadic bacterial cystitis in a bitch: ISCAID guidelines
4-year-old spayed crossbreed bitch, otherwise healthy, with pollakiuria, stranguria and haematuria for 2 days. It is her first episode. The sediment shows pyuria and abundant rods.
According to ISCAID guidelines, what is the most appropriate management?
chevron_right Show answer and explanation
A. Enrofloxacin for 14 days with no need for culture
Fluoroquinolones are not first-line for sporadic cystitis and should be reserved based on culture. Long courses also do not improve outcome and promote resistance.
B. Culture of a free-catch sample: any growth confirms infection
Free-catch urine is contaminated by urethral and genital flora and is only interpretable with very high counts. By cystocentesis, by contrast, even low growth is significant.
C. Urine culture by cystocentesis and, while awaiting results, amoxicillin or trimethoprim-sulfonamide for 3–5 days, adjusted to susceptibility
Correct. ISCAID recommends culture by cystocentesis and, if treating empirically, first-line antibiotics (amoxicillin or trimethoprim-sulfonamide) in short 3–5-day courses for sporadic cystitis. An NSAID may relieve signs.
D. Amoxicillin-clavulanate for 4–6 weeks to prevent recurrence
Courses lasting weeks are reserved for conditions such as bacterial prostatitis. In sporadic cystitis they do not prevent recurrence and increase adverse effects and resistance.
lightbulb Key takeaway
Sporadic cystitis (≤ 2 episodes a year, no complicating factors): culture by cystocentesis, a first-line drug and 3–5 days. If recurrent, culture is mandatory and the underlying cause must be sought (uroliths, vulvar conformation, endocrinopathies).
References: ISCAID guidelines for the diagnosis and management of bacterial urinary tract infections in dogs and cats (2019)
Test yourself with 10 random questions
Clinical pathology · 100 questions, a different test every time
Related questions
Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.