Table 1.
Number of ciguatera poisoning (CP) events, CP cases, and corresponding incidence rates (IR) reported from the medical facility of Rapa Island between 2007 and 2019. The prevalence (in %) of fish species and fishing sites involved in CP events is also given.
| Year | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 1 | 2018 | 2019 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of CP events | 6 | 71 | 21 | 11 | 17 | 32 | 11 | 9 | 6 | - | 4 | 6 | |
| Number of reported CP cases | - | 7 | 87 | 27 | 13 | 17 | 33 | 11 | 15 | 7 | - | 6 | 7 |
| Number of unreported cases 2 | - | 5 | 59 | 3 | 6 | 2 | 1 | - | 7 | 5 | - | 1 | 6 |
| Number of fatal cases | - | - | 2 3 | - | - | - | - | - | - | - | - | - | - |
|
Incidence rates (IR)4 (reported cases/10,000 inhab.) |
- | 145 | 1805 | 560 | 269 | 330 | 660 | 214 | 291 | 136 | - | 118 | 138 |
| Fish species involved (% of event) | |||||||||||||
| Seriola lalandi | - | 50 | 6 | 24 | 18 | - | 7 | - | 44 | 17 | - | 25 | 33 |
| Kyphosus cinerascens | - | 33 | 29 | 29 | 27 | 6 | 3 | - | - | 33 | - | - | 17 |
| Leptoscarus vaigiensis | - | - | 45 | 19 | 9 | 6 | 28 | 27 | - | - | - | - | 17 |
| Others: | - | 17 | 20 | 28 | 46 | 88 | 62 | 73 | 56 | 50 | - | 75 | 33 |
| Scombridae | 17 5 | 3 | |||||||||||
| Carangidae | 9 | 9 | 17 | 3 | 9 | 17 | 25 | ||||||
| Acanthuridae | 17 | 11 | |||||||||||
| Scaridae | 1 | 9 | 12 | 19 | 27 | 34 | 17 | 17 | |||||
| Serranidae | 3 | 9 | 12 | 34 | 18 | 11 | 50 | 16 | |||||
| miscellaneous | 13 | 10 | 28 | 30 | 6 | 19 | 16 | ||||||
| Fishing sites involved (% of event) | |||||||||||||
| Rāhui zone | - | 67 | 49 | 33 | 45 | 35 | 12 | 18 | 11 | 67 | - | 25 | 17 |
| Akatamiro Bay | - | - | 33 | - | - | 6 | 16 | 9 | - | - | - | - | 17 |
| Others: | - | - | 14 | 53 | 27 | 35 | 44 | 18 | 67 | - | - | 50 | 33 |
| Turoa Pari Ati Bay | 2 | 10 | |||||||||||
| Tapuaki Bay | 4 | 5 | |||||||||||
| Agaira’o Bay | 10 | ||||||||||||
| Kaongi | 5 | ||||||||||||
| Motu Tauturau | 10 | 11 | |||||||||||
| Akaomua Bay | 5 | 3 | |||||||||||
| Iripau Bay | 14 | 6 | 9 | 11 | |||||||||
| Ana Rua Bay | 5 | 9 | 9 | 25 | |||||||||
| Vavai Cliffs | 1 | 9 | 23 | 3 | 25 | ||||||||
| offshore | 7 | 9 | 9 | 12 | 12 | 45 | 33 | ||||||
| Unknown | - | 33 | 4 | 14 | 28 | 24 | 28 | 55 | 22 | 33 | 25 | 33 | |
1 No data available for 2017. 2 Number of guests who shared a toxic meal with reporting patients and developed poisoning symptoms, but for whom no declaration form was completed. 3 Fatal cases involved an elderly woman with known comorbidity factors and a middle-aged man, who both presented pronounced cardiovascular symptoms. 4 IRs were calculated according to the population data from the 2007, 2012, and 2017 census. 5 Numbers in italics give the respective prevalence of fish families and fishing sites involved in CP events totalized under the “Others” headings.