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Volume 24, Number 12—December 2018

Rat Lungworm Infection in Rodents across Post-Katrina New Orleans, Louisiana, USA

Rosalyn C. RaelComments to Author , Anna C. Peterson, Bruno Ghersi-Chavez, Claudia Riegel, Amy E. Lesen, and Michael J. Blum
Author affiliations: Tulane University, New Orleans, Louisiana, USA (R.C. Rael, A.C. Peterson, B. Ghersi-Chavez, A.E. Lesen, M.J. Blum); University of Tennessee, Knoxville, Tennessee, USA (A.C. Peterson, B. Ghersi-Chavez, M.J. Blum); The City of New Orleans Mosquito, Termite, and Rodent Control Board, New Orleans (C. Riegel)

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Table 2

Intensity of infection by rat lungworm (Angiostrongylus cantonensis), New Orleans, Louisiana, USA, May 2015–February 2017*

Area   Intensity (no. positive)
Roof rats Norway rats Cotton rats Rice rats Total
Uptown 13.7 (19) 19.5 (4) 14.7 (23)
Lakeview 8.0 (7) 8.0 (7)
Lakeshore 8.7 (23) 8.7 (23)
Gentilly 8.5 (29) 27.9 (7) 12.3 (36)
French Quarter 23.3 (3) 4.0 (1) 18.5 (4)
Bywater 11.1 (12) 12.2 (5) 11.4 (17)
Upper 9th 7.1 (15) 12.3 (7) 8.7 (22)
Lower 9th 7.7 (42) 13.3 (65) 11.1 (107)
Natural area 6.4 (5) 13.5 (4) 9.6 (9)
St. Bernard Parish
6.3 (3)
1 (1)

5.0 (4)
Total 9.2 (158) 14.3 (90) 13.5 (4) 11.1 (252)

*Intensity was computed for each species and each area as the sum of all lungworms counted, divided by the total number of lungworm-positive rodents for which lungworms were counted (in parentheses). Totals represent overall intensity and numbers positive, pooled by neighborhood, by species, or both (total lungworms/total infected rats). Roof rats, Rattus rattus; Norway rats, R. norvegicus; cotton rats, Sigmodon hispidus; rice rats, Oryzomys palustris. Dashes indicate no rats were positive, except in the Lakeview area, where no count data were available for the 1 positive rat trapped.

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Page created: November 19, 2018
Page updated: November 19, 2018
Page reviewed: November 19, 2018
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.