TETRODOTOXIN (TTX) POISONINGiocwestpac.org/files/upload_manual/Malaysia 2.pdfTETRODOTOXIN (TTX)...
Transcript of TETRODOTOXIN (TTX) POISONINGiocwestpac.org/files/upload_manual/Malaysia 2.pdfTETRODOTOXIN (TTX)...
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TETRODOTOXIN (TTX)POISONING
Che Nin Mana, Razak Lajis a , Samsur Mohamad b, Faazaz binti Abd. Latiffc
a) National Poison Centre, Universiti Sains Malaysia (USM), 11800 Penang, Malaysiab) Department of Aquatic Science, Faculty of Resource Science and Technology,
University Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia (UNIMAS) c) Fisheries Research Institute,Department of Fisheries of Malaysia,11960 Jalan Batu
Maung,Penang, Malaysia
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TTX
Low molecular weight Zwitterionic Soluble in water Heat stable Classified as a neurotoxin
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MECHANISM OF TTX
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o 1ST STAGE : numbness of lips, tongue, face, hands,feets, sensations of lightness /floating. dizziness,headache, vomiting, abdominal pain, diarrhea (onset:5 mins- hours)
o 2ND STAGE : paralysis; trouble walking, swallowing, oreven sitting, breathing difficulty, cyanosis, hypotension
o 3RD STAGE : convulsions due to irregular nerve signals,respiratory failure and death (6-24 hours)
No data available for chronic symptoms
SYMPTOMS OF ACUTE POISONING
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No antidote Symptomatic Treatments:1) Absorption prevention- Activated charcoal
2) Treatment- critically maintain/monitor the blood pressure &
respiration- Intubation & mechanical ventilation- Norepinephrine, dopamine-hypotension- Atropine – bradycardia- Neostigmine-Cholinesterase inhibitor- Benzodiazepine (diazepam, lorazepam) -seizure
TREATMENTS
Prognosis is good if patient survives the first 24 hours.
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Babylonia japonica
© Animal-World: Courtesy Ken Childs
Tetraodon fahaka
© Biopix.dk: Jc Schou© Vibrant Sea
Hapaloclaena maculosa
Scarus ghobban
© esv-diver.at
Jania rubens
© horta.uac.pt
Dendrobates auratus
© Ron D. Holt
DISTRIBUTION OF TTX
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PUFFER FISHOrder: Tetraodontiformers
Group Family Common names
1 Ostraciidae3-genus8-species
Box fishes, Cow fishes, Trunk fishes
2 Tetraodontidae13-genus37-species
Puffer fishes, Toads
3 Diodontidae3-genus6-species
Porcupine fishes
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CAUSATIVE SPECIES
Order: TetraodontiformersFamlily: TetraodontidaeTetra: four and Odon: teeth
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TETRAODONTIDAE IN MALAYSIA
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GEOGRAPHICAL DISTRIBUTION
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SOURCES OF TTX
• Exogenous
• Endogenous
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Proposed mechanism of TTX accumulation in marine animals (cited from Noguchi et al., 2006)
SOURCES OF TTX - EXOGENOUS
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How TTX permeate through the cell membranes which consist of highly hydrophobic lipid bilayers.
Source :Nagashima, Y., Hamada, Y., Ushio, H., Nishio, S., Shimakura, K., and Shiomi, K., Subcellular distribution of tetrodotoxin in puffer fish liver,Toxicon, 37: 1833–1837, 1999.
The subcellular distribution of TTX and its derivatives in the puffer liver : possible endogenous origin of TTX
SOURCES OF TTX - ENDOGENOUS
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POISONING INCIDENCES
SabahTrengganu
Johor Sarawak
Year Case Location Source
1985 4 Sabah Med. J. Malaysia. 40 (1), 31-34.
1987 (9) Sabah Med. J. Malaysia. 42 (3), 199-200.
1997 1 Trengganu Med. J. Malaysia. 52 (2), 172-174.
2006 1 Selangor National Poison Centre
1 Sarawak National Poison Centre
2008 34 (2) Johor Med. J. Malaysia. 64 (2), 181-182
1 Sabah State Health Department Sabah
2009 6 (1) Sabah Ministry of Health, Putrajaya
5 (1) Trengganu National Poison Centre
3 (1) Sarawak Health Department, Kuching
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CONSUMMED SPECIES IN MALAYSIA
Sarawak and Sabah: culture & tradition
Yellow pufferfish; Xenopterus naritus
Roes, meat, liver
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Specimen Sex
Body Size Toxicity determined by mouse bioassays (MU/g)
BW (g)
TL(cm)
SL(cm)
Muscle Gonad(Testis/Ovary)
Liver
1 ♀ 350.5 25.6 22.0 <2 7.9 9.8
2 ♀ 381.5 26.0 22.0 <2 6.6 <2
3 ♂ 40.4 16.3 13.9 <2 <2 9.4
Distribution of toxicity of Xenopterus naritus,Yellow puffer from Batang Saribas, SepaohDivision.
Source: Aquatic Department, UNIMAS
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PUFFER FISH FESTIVAL-OPENING CEREMONY AT BETONG, SARAWAK; 2008
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PUFFER FISH FESTIVAL
1st fair: 6-7 Aug 2002 Puffer catching, selling,
preparation and eating together State Tourism calendar as an
annual event since 2004 at Manggut Village, Betong, Sarawak
Season : March till end Oct Location : along Batang Saribas
between Tg Matu (Kg Manggut) & Tg Nangka(Kg Supa)
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TOXICITY VARIATIONS WITHIN & BETWEEN SPECIES
Organ distributions: Skin Roe Intestine Liver Gonad Sex Muscle
1. K. Miyazawa and T. Noguchi, J. Toxicol-Toxin Reviews. 20 (2001)11.
2. M. El-Sayed, G.A. Yacout, M. El-Samra, A. Ali and S.M. Kotb, Ecotox. Environ. Safe. 56 (2003) 367.
3. T. Noguchi, T. Takatani and O. Arakawa, J. Food Hyg. Soc. Jpn. 5(2004)146.
4. T. Noguchi, O. Arakawa and T. Takatani, Comp. Biochem. Phys.D (2006)153.
5. Y. Nagashima, et.al. Food Hyg. Saf. Sci. 51(2010) 48.
6. S. Campbell, R.M. Harada, S.V. DeFelice, P.K. Bienfang and Q.X. Li, Nat. Prod. Res. 23 (2009)1630.
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Tetrodon nigroviridis
Sampadi, Kuching, Sarawak
TTX: 1.35 µg/g
Balik Pulau, Penang
TTX: 0.77 µg/g
Takifugu oblongus
1.02 µg/g
Batu Maung, Batu Maung, Batu Maung, Batu Maung,
Batu Maung, Penang Kuala Rompin, Pahang
2.20 µg/g
Liver
Muscle
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TTX Levels in Various Puffer Species in Malaysian Waters
Lagocephalus sceleratus (1.71 ± 0.28 µg/g)
Xenopterus naritus (Not detected)
Lagocephalus spadiceus (Not detected)
Arothron hispidus (4.11 ± 0.32 µg/g)
Takifugu oblongus (1.38 ± .0.11 µg/g )
Tetrodon nigroviridis (1.34 ± 0.05 µg/g )
Logocephalus lunaris (3.47 ± 0.10 µg/g)
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CONTRIBUTING FACTORS
accumulation of bacteria in puffers
geographical habitats
changes of season
the ecological food chain
Etc.
1. M. El-Sayed, G.A. Yacout, M. El-Samra, A. Ali and S.M. Kotb, Ecotox. Environ. Safe. 56 (2003) 367.
2. T. Noguchi, T. Takatani and O. Arakawa, J. Food Hyg. Soc. Jpn. 5(2004)146.
3. T. Noguchi, O. Arakawa and T. Takatani, Comp. Biochem. Phys. D (2006)153.
4. S. Campbell, R.M. Harada, S.V. DeFelice, P.K. Bienfang and Q.X. Li, Nat. Prod. Res. 23 (2009)1630.
5. T. Saito, T. Noguchi, Y. Shida, T. Abe and K. Hashimoto, Nippon Suisan Gakk. 57(1991)1573.
6. H.C. Jen, S.J. Lin, Y.H. Tsai, C.H. Chen, Z.C. Lin and D.F. Hwang, J.Chromatogr. B. 871 (2008) 95.
7. G.M. Yang, B.L. Bao, E. Peatman, H.R. Li, L.B. Huang and D.M. Ren, Aquaculture 262 (2007) 183
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OCH3
O
OH
OH
NH
HO
HO
OH
+H2N
HN
H
11-deoxyTTX
OCH2OH
O
OH
OH
NH
OH
+H2N
HN
O
anhydroTTX
OCH2OH
O
OH
OH
NH
HO
H
OH
+H2N
HN
OH
4-epiTTX
OCH2OH
O
OH
OH
NH
HO
HO
OH
+H2N
HN
H
TTX
11-deoxyTTX
TTX
4-epiTTX
6-epiTTX
11-deoxyTTX
norTTX-6(S)-ol
norTTX-6(R)-ol
norTTX-6, 6-diol
anhydroTTX
6-epianhydroTTX
5-deoxyTTX
trideoxyTTX
OR4
O
R3
OH
NH
HO
R2
OH
+H2N
HN
R1O
R2O
R1
OH
NH
OH
+H2N
HN
O R2O
R1
OH
NH
HO
HO
O
+H2N
HN
TTX AND ANALOGUES
time [d]
0 10 20 30
inte
nsity
[%]
0
20
40
60
80
100
0
20
40
60
80
100
anhydroTTX
TTX
epiTTX
320>162
304>164
302>162
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TTX and PSP Reported-Pufferfish
poisoning with saxitoxin-not TTX
Clinical presentation and symptoms are similar
Confirmatory laboratory testing must be performed
0 10 20 30
inte
nsity
[%]
20
40
60
80
100
316>298Neo
STX
300>204
dcSTX257>126
TTX
302>162anhydroTTX
320>16211-deoxyTTX
304>286
time [min]
20
40
60
80
100
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National regulations
Malaysia Food act 1983
13. Food containing substances injurious to health' Any person who prepares or sells any food that has in or upon
it any substance which is poisonous, harmful or otherwiseinjurious to health commits an offence and shall be liable, on conviction, to a fine not exceeding one hundred thousand ringgit or to imprisonment for a term not exceeding ten years or to both.
13n. Food unfit for human consumption. Anyperson who prepares or sells any food that consists wholly
or in part of any portion of an animal unfit for food; commits an offence and shall be liable, on conviction, to a fine not exceeding fifty thousand ringgit or to imprisonment for a term not exceeding eight years or to both.
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Food act 1983 Widespread- Public satement/
advisory-Mass media: TV, radio, news paper, official web
Surveillance –Ministry of Health
CONTROLS
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NATIONAL WORKING COMMITTEE ON ISSUES RELATED TO PUFFER
27th February 2009 To reduce mortality & morbidity To identify target group To produce guidelines To allow the consumption with license
& guidelines (to sell, import & preparation) and educational outreach materials
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Risk Communication on Toxic Marine Hazard (puffers)
Ministry of Health-August 2009: guideline preparations
How to identify the eatable species to avoid poisoning How to identify/differentiate the puffer from other fish
species Preparation/ cutting of puffer to avoid poisoning How to identify sign/symptom and management of
poisoning Survey on knowledge & practice related to puffer
poisoning
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Risk Communication on Toxic Marine Hazard (puffers)
Survey results:– very low
knowledge among public
– 68% don’t know morphology of puffers
Proper Preparation of Puffer Fish
28%
72%
YesNo
Figure 3: Knowledge among Respondents
Training in Handling/Preparation of Puffer Fish
9%
91%
YesNo
Figure 4:
Guideline to be delivered in the form of:• Pamphlet• Poster• Website – Advisory Notes• Documentary– TV Show
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GU
IDEL
INE
ON
HO
W T
O
PR
EPA
RE
/CU
T TH
E P
UFF
ERS
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GU
IDEL
INE
ON
HO
W T
OC
LEA
N T
HE
PU
FFER
S
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OTHER OUTREACH MATERIALS
Guide book with illustrations Monograph of puffers in Malaysia 2008 Pamphlets Posters of puffer fish species & distribution Poster on non-eatable puffers Articles in bulletin, newspapers
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PUBLIC AWARENESS PROGRAMS
• Public talk• Puffer identification
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KNOWLEDGE, ATTITUDE & PRACTICE CHANGE
Expand Network With Relevant Stakeholder
Introducing 24hours Emergency Line
Community Empowerment
Recommendation
Situational Analysis
Capacity Building Workshop
Formation Of Special Interest Group
Awareness Program
PU
BLI
C A
WA
REN
ESS
PR
OG
RA
MS
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MONITORING FACILITIES
NO AGENCY/DEPARTMENT TOXIN TECHNIQUE
1PUBLIC HEALTH
LABORATORY, JOHOR TTXLC-MS-METHOD
DEVELOPMENT
2PUBLIC HEALTH
LABORATORY, SABAH PSP HPLC & LC-MS/MS
3 AQUATIC SCIENCE, UNIMAS TTX, PSP MOUSE BIOASSAY
4FISHERIES RESEARCH
INSTITUTE, PENANG PSP HPLC
5NATIONAL POISON CENTRE,
USM TTX GC-MS
6FISHERY DEPARTMENT,
SABAH PSP MOUSE BIOASSAY
SOURCE: FRI, PENANG
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R & D in MalaysiaYear Research Agency1973 Comparative lethality of tissue extracts from
Malaysian puffer fishes Lagocephalus lunarislunaris, L. 1. spadiceus and Arothron stellatus.
UM
2006 Toxicity of the yellow puffer fish Xenopterus naritus from Sungai Saribas, Sarawak.
UNIMAS
2006 Toxicity of Puffer Fishes (Lagocephalus wheeleri Abe, Tabeta and Kitahama, 1984 and Lagocephalus sceleratus Gmelin, 1789) from the East Coast Waters Peninsular Malaysia
UKM
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R & D in MalaysiaYear
2008 A hatchery to culture the yellow puffer fish FRI, Sarawak
2009
2010
Screening of tetrodotoxin in puffers using gas chromatography–mass spectrometry
Comparison of TTX levels in various puffer fishes in Malaysia
USM
USM
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SUMMARY
CONTINOUS MONITORING OF TTX IN PUFFERS AND OTHER MARINE ANIMALS
PUBLIC AWARENESS PROGRAM
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THANK-YOU FOR YOUR KIND ATTENTION
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94 119 133 231 232 288 278 291 387
859
1280 1329
1936
2599
3426
0
500
1000
1500
2000
2500
3000
3500
4000
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Year
Num
ber o
f cas
esPoisoning Cases Referred to NPC
HrsHrs
2424Start 24-hours service – Nov 2003
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Natural Toxins Poisonings Referred to NPC from 2006 to 2008
96 (52.17%)
31 (16.85%)25 (13.59%)
0
20
40
60
80
100
120
Snake
Spider/
Scorpi
on/C
entip
ede
Insec
ts
Jellyf
ishOthe
r mari
ne to
xin
Plants
Bacter
ia/Fun
gi/Alga
eOthe
rs Natu
ral Tox
ins
Types of Natural Toxins
Num
ber o
f Nat
ural
Tox
ins
Pois
onin
g C
ases