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Volume 22, Number 12—December 2016

Investigation of and Response to 2 Plague Cases, Yosemite National Park, California, USA, 2015

Mary Danforth, Mark Novak, Jeannine Petersen, Paul S. Mead, Luke Kingry, Matthew Weinburke, Danielle Buttke, Gregory Hacker, James Tucker, Michael Niemela, Bryan Jackson, Kerry Padgett, Kelly Liebman, Duc Vugia, and Vicki L. KramerComments to Author 
Author affiliations: California Department of Public Health, Sacramento, California, USA (M. Danforth, M. Novak, G. Hacker, J. Tucker, M. Niemela, B. Jackson, K. Padgett, K. Liebman, D. Vugia, V. Kramer); Centers for Disease Control and Prevention, Fort Collins, Colorado, USA (J. Petersen, P. Mead, L. Kingry); National Park Service, El Portal, California, and Fort Collins, Colorado, USA (M. Weinburke, D. Buttke)

Main Article

Table 1

Yersinia pestis transmission risk assessments in and around Yosemite National Park, California, USA, August–October 2015*

Site Association Name Jurisdiction Elevation, m Assessment activity* Y. pestis detection
1 Patient 1 visited Rainbow Pool Day Use Area Stanislaus National Forest 850 V, B None
2 Patient 1 visited Crane Flat CG Yosemite National Park 1,890 V, B, T, C Serology +, flea pool +
3 Patients 1 and 2 visited Yosemite Valley Yosemite National Park 1,220 H, V, T, C None
4 Patient 2 visited Glacier Point Yosemite National Park 2,190 V, B, T Serology +
5 Patient 2 visited Sentinel Dome Yosemite National Park 2,470 V, B None
6 Patient 2 visited Vernal Falls Yosemite National Park 1,510 V, B None
7 Patient 2 visited Bass Lake Sierra National Forest 1,040 H None
8 Patient 2 visited Lewis Creek Sierra National Forest 1,280 V, B None
9 Patient 2 visited Nelder Grove Sierra National Forest 1,640 V, B None
10 Expanded investigation White Wolf CG Yosemite National Park 2,400 V None
11 Expanded investigation Porcupine Flat CG Yosemite National Park 2,480 V None
12 Expanded investigation Tamarack Flat CG Yosemite National Park 1,940 V, B, T Serology +
13 Expanded investigation Hodgdon Meadows CG Yosemite National Park 1,450 V None
14 Expanded investigation Tuolumne Meadows Yosemite National Park 2,620 V, B, T, C Serology +, flea pool +, carcass +
15 Expanded investigation Crane Flat–NatureBridge Campus Yosemite National Park 1,890 V None
16 Expanded investigation Wawona Yosemite National Park 1,220 C None
17 Expanded investigation Bridalveil Creek CG Yosemite National Park 2,130 V None

*B, burrow swabbing; C, carcass collection; CG, campground; H, historical review; T, rodent trapping; V, visual assessment; +, positive for Y. pestis.

Main Article

Page created: November 16, 2016
Page updated: November 16, 2016
Page reviewed: November 16, 2016
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.