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Updated: Jul 5, 2026

Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
Published on: January 18, 2018
Preventive antibacterial therapy in acute ischemic stroke: a randomized controlled trial
Hendrik Harms1, Konstantin Prass, Christian Meisel
1Department of Neurology, Charité Universitaetsmedizin Berlin, Berlin, Germany.
Background:
Pneumonia is a major risk factor of death after acute stroke. In a mouse model, preventive antibacterial therapy with moxifloxacin not only prevents the development of post-stroke infections, it also reduces mortality, and improves neurological outcome significantly. In this study we investigate whether this approach is effective in stroke patients.
Methods:
Preventive ANtibacterial THERapy in acute Ischemic Stroke (PANTHERIS) is a randomized, double-blind, placebo-controlled trial in 80 patients with severe, non-lacunar, ischemic stroke (NIHSS>11) in the middle cerebral artery (MCA) territory. Patients received either intravenous moxifloxacin (400 mg daily) or placebo for 5 days starting within 36 hours after stroke onset. Primary endpoint was infection within 11 days. Secondary endpoints included neurological outcome, survival, development of stroke-induced immunodepression, and induction of bacterial resistance.
Findings:
On intention-to treat analysis (79 patients), the infection rate at day 11 in the moxifloxacin treated group was 15.4% compared to 32.5% in the placebo treated group (p = 0.114). On per protocol analysis (n = 66), moxifloxacin significantly reduced infection rate from 41.9% to 17.1% (p = 0.032). Stroke associated infections were associated with a lower survival rate. In this study, neurological outcome and survival were not significantly influenced by treatment with moxifloxacin. Frequency of fluoroquinolone resistance in both treatment groups did not differ. On logistic regression analysis, treatment arm as well as the interaction between treatment arm and monocytic HLA-DR expression (a marker for immunodepression) at day 1 after stroke onset was independently and highly predictive for post-stroke infections.
Interpretation:
PANTHERIS suggests that preventive administration of moxifloxacin is superior in reducing infections after severe non-lacunar ischemic stroke compared to placebo. In addition, the results emphasize the pivotal role of immunodepression in developing post-stroke infections.
Trial Registration:
Controlled-Trials.com ISRCTN74386719.
Insights
Preventive moxifloxacin therapy reduced post-stroke infections in patients with severe ischemic stroke. This study highlights the role of immunodepression in infection development after stroke.
Area of Science:
- Neurology
- Infectious Diseases
- Clinical Trials
Background:
- Pneumonia is a significant cause of mortality following acute stroke.
- Mouse models show moxifloxacin reduces post-stroke infections, mortality, and improves neurological outcomes.
- This study evaluates moxifloxacin's efficacy in human stroke patients.
Purpose of the Study:
- To investigate the effectiveness of preventive antibacterial therapy with moxifloxacin in patients with acute ischemic stroke.
- To assess the impact of moxifloxacin on infection rates, neurological outcomes, and survival.
- To explore the role of stroke-induced immunodepression and bacterial resistance.
Main Methods:
- The Preventive ANtibacterial THERapy in acute Ischemic Stroke (PANTHERIS) trial was a randomized, double-blind, placebo-controlled study.
- 80 patients with severe, non-lacunar, ischemic stroke (NIHSS>11) in the MCA territory were enrolled.
- Patients received intravenous moxifloxacin (400 mg daily) or placebo for 5 days, starting within 36 hours of stroke onset.
Main Results:
- Intention-to-treat analysis showed a trend towards reduced infection rates with moxifloxacin (15.4% vs. 32.5%, p=0.114).
- Per-protocol analysis revealed a significant reduction in infection rates (17.1% vs. 41.9%, p=0.032) with moxifloxacin.
- Moxifloxacin did not significantly influence neurological outcome or survival; fluoroquinolone resistance rates were similar between groups.
- Treatment arm and monocytic HLA-DR expression predicted post-stroke infections.
Conclusions:
- Preventive moxifloxacin administration appears superior to placebo in reducing infections after severe non-lacunar ischemic stroke.
- The study underscores the critical role of immunodepression in the development of post-stroke infections.
- Further research may be warranted to optimize preventive strategies for post-stroke infections.
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