Related Experiment Video
Updated: Jul 14, 2026

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
Published on: June 4, 2012
Conspicuous endoscopic appearance of ventriculitis caused by coagulase-negative staphylococci
Chih-Wei Chang1, Goro Nagashima, Tsukasa Fujimoto
1Department of Neurosurgery, Fujigaoka Hospital, Showa University, 1-30 Fujigaoka, Aoba-ku, Yokohama-shi, Kanagawa 227-8501, Japan.
Abstract:
To date, reports about the macroscopic appearance of ventriculitis have been rare, consisting only of a few autopsy cases. A patient in our hospital had ventriculitis caused by coagulase-negative staphylococci, and under neuroendoscopy we obtained clear findings of granular ependymitis. A 44-year-old man was admitted for disturbance of consciousness caused by progressive hydrocephalus. He had experienced subarachnoid hemorrhage (SAH) from a left vertebral dissecting aneurysm, and had subsequently received a ventriculoperitoneal shunt against post-SAH hydrocephalus. After admission, he was found to have retrograde shunt infection from peritonitis caused by cholecystitis. Coagulase-negative staphylococci were detected in cerebrospinal fluid (CSF), and the infection persisted even with intrathecal administration of gentamycin, and intravenous administration of vancomycin and arbekacin. Endoscopic rinsing was performed, and multiple small yellowish microgranulations, less than 1 mm in diameter, were observed in the lateral ventricles and the third ventricle. Rinsing of the CSF after intensive antimicrobial treatment resulted in a cure. Because there have been no reports of endoscopic observations of bacterial ventriculitis, we were unable to be certain about the origin or significance of the microgranulations. However, whether or not the microgranulations were bacterial colonies, infection did not recur during a 2-year follow-up period.
Insights
Neuroendoscopy revealed granular ependymitis in a rare case of bacterial ventriculitis. This rare finding, associated with coagulase-negative staphylococci, was successfully treated with endoscopic rinsing and antimicrobial therapy.
Area of Science:
- Neuroscience
- Infectious Diseases
- Neurosurgery
Background:
- Ventriculitis, an inflammation of the brain's ventricles, is infrequently reported, with limited macroscopic descriptions available, primarily from autopsy studies.
- This case involves a 44-year-old male with hydrocephalus secondary to subarachnoid hemorrhage, who developed a shunt infection.
Observation:
- The patient presented with altered consciousness due to progressive hydrocephalus and a retrograde shunt infection caused by coagulase-negative staphylococci.
- Cerebrospinal fluid (CSF) analysis confirmed the infection, which was resistant to multiple antibiotics.
- Neuroendoscopy revealed multiple small, yellowish microgranulations (<1 mm) in the lateral and third ventricles, consistent with granular ependymitis.
Findings:
- Endoscopic rinsing combined with intensive antimicrobial treatment led to the resolution of bacterial ventriculitis.
- The microgranulations observed during endoscopy, though their exact nature (bacterial colonies or inflammatory response) remains uncertain, were associated with a successfully treated infection.
Implications:
- This case provides rare endoscopic visualization of bacterial ventriculitis, offering insights into its macroscopic appearance.
- The successful treatment highlights the potential role of neuroendoscopy in managing complex shunt infections.
- Long-term follow-up confirmed the absence of recurrence, underscoring the efficacy of the combined therapeutic approach.
Related Concept Videos
Endocarditis I: Introduction
Endocarditis II: Clinical Features of Infective Endocarditis
Staphylococcal Skin Infections
Brain Abscess l: Introduction
Viral Meningitis
Bacterial Meningitis II: Pathophysiology