Another case of "European hantavirus pulmonary syndrome" with severe lung, prior to kidney, involvement, and diagnosed by viral inclusions in lung macrophages.

Gizzi, Marco;Delaere, Bénédicte;Weynand, Birgit;Clement, J;Bulpa, Pierre;et.al.
(2013) European Journal of Clinical Microbiology & Infectious Diseases : an international journal on pathogenesis, diagnosis, epidemiology, therapy, and prevention of infectious diseases —

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Abstract
Puumala virus (PUUV) is considered a classic Old World etiologic agent of nephropathia epidemica (NE), or hemorrhagic fever with renal syndrome (HFRS). HFRS is considered to be distinct from hantavirus (cardio-)pulmonary syndrome (HPS or HCPS), described in the New World. Here, we report a severe case, which fulfilled most, if not all, Centers for Disease Control and Prevention (CDC) criteria for HPS, needing non-invasive ventilation and subsequent acute hemodialysis. However, the etiological agent was PUUV, as proved by serological testing, real-time polymerase chain reaction (PCR), and sequencing. Viral antigen was detected by specific anti-PUUV immunostaining, showing, for the first time, greenish intracytoplasmic inclusions in bronchoalveolar lavage (BAL) macrophages. This case definitely confirms that HPS can be encountered during PUUV infections. Interestingly, special findings could render the diagnosis easier, such as greenish homogeneous cytoplasmic inclusions, surrounded by a fine clear halo in BAL macrophages. Therefore, although the diagnosis remains difficult before the onset of renal involvement, the occurrence of severe respiratory failure mimicking community-acquired pneumonia must alert the clinician for possible HPS, especially in endemic areas.
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Gizzi, M., Delaere, B., Weynand, B., Clement, J., Maes, P., Vergote, V., Laenen, L., Hjelle, B., Verroken, A., Dive, A.-M., Michaux, I., Evrard, P., Creytens, D., & Bulpa, P. (2013). Another case of “European hantavirus pulmonary syndrome” with severe lung, prior to kidney, involvement, and diagnosed by viral inclusions in lung macrophages. European Journal of Clinical Microbiology & Infectious Diseases : an international journal on pathogenesis, diagnosis, epidemiology, therapy, and prevention of infectious diseases. https://doi.org/10.1007/s10096-013-1885-x