# Multisite infection with Austrian syndrome caused by non-vaccine pneumococcal serotype—case report

**Authors:** Frederik Juel Pontoppidan Børrild, Emil Fosbøl, Casper Roed, Melissa Hornbæk Øvre, Helle Brander Eriksen, Christian Kraef, Jannik Helweg-Larsen, Zitta Barrella Harboe, Christina Ekenberg

PMC · DOI: 10.1128/asmcr.00061-25 · ASM Case Reports · 2025-08-21

## TL;DR

A rare and severe case of Austrian syndrome caused by a non-vaccine pneumococcal serotype is reported in an immunocompromised patient.

## Contribution

The report highlights a rare multisite infection caused by a non-vaccine pneumococcal serotype in an immunocompromised individual.

## Key findings

- Austrian syndrome was complicated by spondylodiscitis and endophthalmitis in an immunocompromised patient.
- The causative serotype (23B) is not included in standard pneumococcal vaccines.
- Reduced susceptibility to benzylpenicillin was observed, which is uncommon in Denmark.

## Abstract

Although rare, Austrian syndrome remains a life-threatening triad consisting of pneumonia, endocarditis, and meningitis caused by Streptococcus pneumoniae.

We present a case of Austrian syndrome, further complicated by spondylodiscitis and endophthalmitis, in an immunocompromised male receiving methotrexate treatment for rheumatoid arthritis. The infection was caused by a non-vaccine pneumococcal serotype (23B). Susceptibility testing showed reduced susceptibility towards benzylpenicillin, an uncommon finding in Denmark.

This case illustrates some of the challenges faced in managing invasive pneumococcal disease and underlines the importance of continued awareness of this disease, particularly in immunocompromised patients.

## Linked entities

- **Chemicals:** methotrexate (PubChem CID 4112)
- **Diseases:** pneumonia (MONDO:0005249), endocarditis (MONDO:0005025), meningitis (MONDO:0021108), endophthalmitis (MONDO:0016047), rheumatoid arthritis (MONDO:0008383)
- **Species:** Streptococcus pneumoniae (taxon 1313)

## Full-text entities

- **Diseases:** endocarditis (MESH:D004696), meningitis (MESH:D008580), Austrian syndrome (MESH:D013577), pneumococcal disease (MESH:D011008), pneumonia (MESH:D011014), Multisite infection (MESH:D007239), endophthalmitis (MESH:D009877), spondylodiscitis (MESH:D015299), rheumatoid arthritis (MESH:D001172)
- **Chemicals:** methotrexate (MESH:D008727), benzylpenicillin (MESH:D010400)
- **Species:** Homo sapiens (human, species) [taxon 9606], Streptococcus pneumoniae (species) [taxon 1313]

## Full text

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## Figures

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## References

16 references — full list in the complete paper: https://tomesphere.com/paper/PMC12584194/full.md

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Source: https://tomesphere.com/paper/PMC12584194