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#Italy, Integrated #WNV & #USUV Viruses #Surveillance - Weekly #Bulletin No. 8, September 4 2025 (summary)

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By G.M.



{Summary}

-- During current surveillance week (28 August - 3 September 2025): 

- 72 new confirmed human cases of West Nile Virus infection have been confirmed; 

-- The total number of cases since the beginning of epidemic season has risen to 502 (they were 430 in the last bulletin); of these: 

- 226 were West Nile Neuroinvasive Disease (WNND): 11 in Piedmont, 16 in Lombardy, 17 Veneto, 1 Friuli-Venezia Giulia, 1 Liguria, 15 Emilia-Romagna, 3 Tuscany, 71 Latium, 2 Molise, 72 Campania, 1 Apulia, 2 Basilicata, 5 Calabria, 1 Sicily, 8 Sardinia, 

- 40 were asymptomatic cases detected in blood donors, 

- 226 were West Nile Fever cases (one of them imported from Kenya),

- 5 asymptomatic cases, 

- 5 unspecified. 

-- So far there have been 33 fatal cases: 3 in Piedmont, 1 Lombardy, 1 Emilia-Romagna, 14 Latium, 12 Campania, 2 Calabria. 

- The Case-Fatality rate among WNND cases is thus far at 14.6% (in 2018 it was 20%, in 2024 14%). 

-- During current surveillance week, there have been 4 confirmed Usutu virus human infections: 2 in Piedmont, 1 Veneto, 1 Latium).

(...)

Source: High Institute of Health, https://www.epicentro.iss.it/westnile/bollettino/Bollettino_WND_2025_08.pdf

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