From: Surveillance study of vector species on board passenger ships, Risk factors related to infestations
 | Ferries with cockroach infestations | ||
---|---|---|---|
Factors | Factor Yes (%) | Factor No (%) | RR (95% CI) |
Pest control methods and practices | Â | Â | Â |
Cockroaches observed by crew | 9 (81.8) | 2 (20.0) | 4.09 (1.14–14.57) |
Flies observed by crew | 6 (60.0) | 5 (45.5) | 1.32 (0.58–3.00) |
Regular visual inspections by crew | 10 (58.8) | 1 (25.0) | 2.35 (0.41–13.45) |
Use of spray pesticide by crew | 10 (66.7) | 1 (16.7) | 4.00 (0.64–24.80) |
Fumigation application | 2 (40.0) | 7 (58.3) | 0.68 (0.21–2.22) |
Absence of cockroach monitoring record log | 10 (71.4) | 1 (14.3) | 5.00 (0.79–31.62) |
Pesticide A: Cyfluthrin/spray | 7 (87.5) | 4 (30.8) | 2.84 (1.20–6.96) |
Pesticide B: Fripronil/gel | 8 (80.0) | 3 (27.3) | 2.93 (1.06–8.08) |
Pesticide C: Alphacypermethrin/spray | 5 (83.3) | 6 (40.0) | 2.08 (1.01–4.26) |
Pesticide D: Deltamethrin/spray | 1 (50.0) | 10 (52.6) | 0.95 (0.22–4.05) |
Pesticide E: Methylisobutylketone/spray | 1 (50.0) | 10 (52.6) | 0.95 (0.22–4.05) |
Pesticide F: Permethrin/smoke generator | 2 (66.7) | 9 (50.0) | 1.33 (0.52–3.3) |
Other factors | Â | Â | Â |
   Pet transportation on board | 7 (53.8) | 4 (50.0) | 1.07 (0.45–2.53) |
   HACCP application | 1 (16.7) | 10 (71.4) | 0.23 (0.03–1.43) |
   Itinerary: North-East Aegean | 5 (83.3) | 6 (40.0) | 2.08 (1.01–4.26) |
   Itinerary: Cyclades | 5 (55.6) | 6 (50.0) | 1.11 (0.49–2.50) |