Volume 24, Number 12—December 2018
Research
Rat Lungworm Infection in Rodents across Post-Katrina New Orleans, Louisiana, USA
Rosalyn C. Rael
, Anna C. Peterson, Bruno Ghersi-Chavez, Claudia Riegel, Amy E. Lesen, and Michael J. Blum
, Anna C. Peterson, Bruno Ghersi-Chavez, Claudia Riegel, Amy E. Lesen, and Michael J. Blum
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 updated: November 19, 2018
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