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Philadelphia is home to a diverse population, including many residents who are connected to tropical and subtropical regions of the world and often travel to these areas to visit friends and family where travel-associated vector-borne diseases (e.g. malaria, dengue, chikungunya, and Zika) are endemic.
Click here to view the latest report of travel-related arboviral infections in a printable format.
Click here to view West Nile Virus surveillance data.
|
|
Malaria |
Chikungunya |
Dengue |
Zika |
|
Year, n |
145 |
0 |
19 |
59 |
|
2020 |
7 |
0 |
1 |
0 |
|
2019 |
45 |
0 |
13 |
0 |
|
2018 |
41 |
0 |
1 |
0 |
|
2017 |
30 |
0 |
0 |
11 |
|
2016 |
22 |
0 |
3 |
48 |
|
Median Age, y (Range) |
41 (0-106) |
- |
35 (5-64) |
34 (0-73) |
|
Female, n (%) |
46.5 (34-59) |
- |
6 (33%) |
45 (76%) |
|
Foreign Born, n (%) |
101 (69%) |
- |
6 (33%) |
39 (66%) |
|
Hospitalized, n (%) |
109 (75%) |
- |
11 (61%) |
0 (0%) |
|
Death, n (%) |
0 (0%) |
- |
0 (0%) |
0 (0%) |
Worldwide Distribution Reports
Chikungunya, dengue, and Zika viruses are spread by Aedes spp. mosquitoes, which are daytime biters and found around homes due to their short flight range. Aedes aegypti, a principle vector for transmission of these viruses is not found in Philadelphia. Aedes albopictus (Asian tiger mosquito), a less efficient vector are present and active during warmer months in Philadelphia. PDPH will continue to assess the presence of A. albopictus in Philadelphia and closely monitor human surveillance data to promptly identify local transmission should it occur.
Aedes Species Mosquito Activity - 2020 Season Summary:
|
|
A. aegypti |
A. albopictus |
|
Number of identifications since May 2020 |
0 |
684 |
|
Median number of mosquitoes per trap (range) |
- |
2 (1-907) |
|
Percentage of all mosquito traps (with adult mosquitoes) set during 2020 season |
- |
25.5% |
|
Percentage of residential zip code with Aedes mosquitoes |
- |
78.7% |