Journal List > J Vet Sci > v.21(2) > 1144507

Kang, Hossain, Jeong, Park, Kim, Kang, Kwon, Kim, and Park: Application of carbon dioxide as a novel approach to eradicate poultry red mites

Abstract

Poultry red mites (PRMs), Dermanyssus gallinae, are one of the most harmful ectoparasites of laying hens. Because of their public health impact, safe, effective methods to eradicate PRMs are greatly needed. Carbon dioxide (CO2) was shown to eradicate phytophagous mites; however, there is no evidence that PRMs can be eradicated by CO2. Thus, the efficacy of CO2, applied by direct-spraying and dry ice-generated exposure, for eradicating PRMs was investigated. Both treatments eradicated > 85% of PRMs within 24 h and 100% of PRMs by 120 h of post-treatment. Therefore, these novel approaches may be useful for eradicating PRMs in clinical settings.

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Fig. 1.
Schematic representations of CO2 treatment methods to eradicate PRMs in this study. (A) Direct spraying of CO2. (B) Exposure to dry ice-generated CO2 in a closed chamber. CO2, carbon dioxide; PRM, poultry red mite.
jvs-21-e37f1.tif
Table 1.
Efficacy of CO2 treatment for the eradication of poultry red mites using different application methods
CO2 treatment method Eradication rate (%) at different time intervals after CO2 treatment
2 h 24 h 48 h 120 h
833 ppm 2,500 ppm 4,167 ppm 833 ppm 2,500 ppm 4,167 ppm 833 ppm 2,500 ppm 4,167 ppm 833ppm 2,500 ppm 4,167 ppm
Control   0.0 ± 0.0     0.0 ± 0.0     0.0 ± 0.0     1.7 ± 2.0  
Exposure (1 min) 25.8 ± 5.6 34.5 ± 6.5 42.5 ± 4.8 35.2 ± 5.4 41.0 ± 4.3 48.7 ± 10.1 50.5 ± 6.7 55.4 ± 4.3 60.2 ± 9.4 72.6 ± 8.5 92.5 ± 3.2 95.2 ± 5.5
Exposure (2 min) 31.5 ± 9.9 48.7 ± 4.6 50.2 ± 5.8 35.6 ± 4.3 55.5 ± 5.7 59.5 ± 6.7 59.5 ± 10.0 68.7 ± 6.8 69.2 ± 5.6 73.7 ± 6.7 89.2 ± 9.5 97.7 ± 9.0
Exposure (5 min) 45.4 ± 5.7 72.2 ± 5.4 70.7 ± 6.7 55.8 ± 2.6 76.7 ± 6.8 75.5 ± 6.0 57.4 ± 9.7 85.5 ± 7.4 80.6 ± 7.2 85.3 ± 8.4 92.2 ± 8.7 99.5 ± 8.5
Exposure (10 min) 59.7 ± 7.1 77.5 ± 4.3 76.6 ± 4.3 64.5 ± 9.3 80.6 ± 5.4 82.8 ± 4.6 69.5 ± 2.7 85.6 ± 8.1 88.4 ± 11.2 84.2 ± 12.5 5 95.7 ± 7.5 97.5 ± 8.7
Exposure (30 min) 62.5 ± 5.7 77.8 ± 5.8 77.2 ± 7.3 72.8 ± 10.0 82.2 ± 9.8 85.5 ± 6.3 78.5 ± 6.9 89.8 ± 3.5 91.5 ± 9.7 85.4 ± 11.7 96.2 ± 5.4 99.0 ± 2.0
Spray (10 sec)   74.6 ± 15.2     89.4 ± 11.5     96.8 ± 12.8     100.0 ± 0.0  

Data represent the mean ± SD of 3 replicate analyses. The eradication rates of poultry red mites in CO2 treatment groups (both CO2 exposure and spraying) are significantly (p < 0.05) different than the control group at each observation time (2, 24, 48, and 129 h). CO, carbon dioxide.

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