Nine cases of envenomation by the Papuan taipan snake (Oxyuranus scutellatus canni) in rural Papua New Guinea are presented. Eight of the nine cases resulted in death, often due to factors such as delayed treatment, incorrect or delayed antivenom administration, failure to recognize symptoms, and lack of antivenom. The one surviving patient received prompt antivenom for coagulopathy symptoms. Proper recognition of envenomation symptoms, early pressure immobilization, ongoing assessment, and timely treatment with the appropriate antivenom may improve survival rates for snakebite victims in rural areas.
While the world was focused on covid 19, WHO has made and issued consolidated guidelines making changes in how to prevent, diagnose and treat tuberculosis.
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"Snake Bite Management in Indian Context" by Dr Subhash Ranjan NM,VSMsranjan
I have summed up this presentation with practical point of view. I have shot myself majority of the snakes and feel they should be understood by the community. Some of them are venomous (not poisonous)! The management is syndromic approach and I feel this ppt would be beneficial to medical students.
Snake bite is one of the major public health problems in the tropics. It is also emerging as an occupational disease of agricultural workers. In view of their strong beliefs and many associated myths, people resort to magico –religious treatment for snake bite thus, causing delay in seeking proper treatment.
Snake bites is a particularly important public health problem in rural areas of tropical and subtropical countries situated in Africa, Asia, Oceania and Latin America.
"Snake Bite Management in Indian Context" by Dr Subhash Ranjan NM,VSMsranjan
I have summed up this presentation with practical point of view. I have shot myself majority of the snakes and feel they should be understood by the community. Some of them are venomous (not poisonous)! The management is syndromic approach and I feel this ppt would be beneficial to medical students.
Snake bite is one of the major public health problems in the tropics. It is also emerging as an occupational disease of agricultural workers. In view of their strong beliefs and many associated myths, people resort to magico –religious treatment for snake bite thus, causing delay in seeking proper treatment.
Snake bites is a particularly important public health problem in rural areas of tropical and subtropical countries situated in Africa, Asia, Oceania and Latin America.
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1. PAPUAN TAIPAN
(Oxyuranus scutellatus canni)
ENVENOMATION IN RURAL
PAPUA NEW GUINEA
David Williams and Ben Bal
Annals of ACTM 2003; 4:1. pp 6-9
ABSTRACT
Nine cases of serious envenomation following bites by Papuan taipans Oxyuranus scutellatus canni are
presented. Eight cases were fatal with contributing factors such as delayed presentation with advanced
symptoms, incorrect antivenom administration, failure to recognise key indications of envenoming,
lack of antivenom, and delayed administration of correct antivenom. The survival of a single patient was
greatly assisted by prompt recognition of coagulopathy as a symptom of envenoming, followed by
administration of appropriate antivenom and careful patient monitoring using available techniques
such as the 20WBCT protocol. A consistent approach to management incorporating strategies such as
early recognition of envenomation, prompt pressure immobilisation, precise ongoing clinical assessment
and early treatment with appropriate antivenom may improve the prognosis of envenomed patients.
INTRODUCTION
Snakebite in Papua New Guinea is a serious public health problem with localized incidence among the
highest of any tropical region in the world1,2. Research involving ICU patients at Port Moresby General
Hospital (PMGH) found a mean case fatality rate (CFR) of 9.54%, while among children under 10 years
the CFR was 15.7%. 39.9% of all cases involved children under the age of 15 years, and these patients
accounted for 55.6% of fatalities3. The prognosis for patients at rural health centres is sometimes
considerably worse with CFR among envenomed patients as high as 60% at some centres (unpublished
data).
In two earlier studies envenomation by Papuan taipans Oxyuranus scutellatus canni, accounted for 83.2%
and 89.0% of snakebite victims admitted to PMGH respectively1,2. This species is widely distributed
across southern PNG and is the most medically important snake in the country1-6. Bites are characterized
by rapid development of facial and bulbar paralysis typically in conjunction with coagulopathy, and
untreated leads to respiratory failure, cyanosis and death7-11. Victims may not respond well to treatment
with current antivenoms especially if administration is delayed, and this influences mortality4,7,9.
PAPUAN TAIPAN
(Oxyuranus scutellatus canni)
ENVENOMATION IN RURAL
PAPUA NEW GUINEA
David Williams
BSc
david.williams1@jcu.edu.au
and Ben Bal
DAppHlthSc, DCommHlth
benwaima@hotmail.com
Correspondence: PO Box 168
PORT MORESBY
NCD PAPUA NEW GUINEA
FIGURE 1 PAPUAN TAIPAN Oxyuranus scutellatus canni FROM MOREGUINA, CENTRAL PROVINCE, PAPUA NEW GUINEA
6 ANNALS OF THE ACTM
2. Oxyuranus scutellatus canni are large (to 3.5 metres) active, diurnal snakes
that are frequently encountered by man. They are common inhabitants of
village gardens and settlement areas. Base dorsal colour varies from reddish-
brown to almost black, but virtually all specimens have a characteristic
orange-red vertebral stripe along the backbone (Figure 1)5,6. A diagnosis of
Oxyuranus scutellatus canni envenoming should be suspected in all cases
where this feature is described, especially if early coagulopathy is evident.
Antivenom is often in critically short supply throughout PNG, and combined
with the chronic decline of health care facilities in rural communities; limited
training and expertise of health workers; extremely poor transport
infrastructure; and communications difficulties, the prognosis for victims of
serious envenoming snakebite in remote and rural areas of PNG is generally
poor1-4,12-13. This paper reports cases of Oxyuranus scutellatus canni bites
managed in rural health centres, and illustrates the importance of early
recognition of clinical indicators of envenoming, careful monitoring of
symptoms, and prompt administration of appropriate antivenom in reducing
mortality.
METHODS
Representative cases with signs and symptoms consistent with envenoming
by Oxyuranus scutellatus canni were selected from a large database of cases
collected as part of a broad retrospective epidemiological study of snakebite
at 14 rural health centres throughout the Central, Gulf and Western Provinces
of PNG (PNG MRAC Approval 01.09; JCU HESC H1239/2001). Actual location
details have been withheld to protect the anonymity of patients and their
families.
CASE REPORTS
Case #1 FIGURE 2 FAMILY MEMBERS SURROUNDING MALE (42) PATIENT BEING TREATED
A woman (18) presented at a rural Health Sub-Centre at 10.45 pm after a FOLLOWING ENVENOMATION BY A PAPUAN TAIPAN Oxyuranus scutellatus canni (CASE #3)
snakebite some time earlier. She complained of headache, abdominal pain
and vomiting. Bilateral ptosis, tachycardia (120 bpm), drowsiness and limb Case #3
weakness were noted. Blood pressure (BP) was 100/80 mmHg, with A male farmer (42) was bitten twice on the left big toe by a “large black snake
respiration rate (RR) of 40 per minute. An IV was established, tetanus with a red stripe on the back” while walking along a remote rural road at
prophylaxis administered and the patient referred by road to Kerema about 1.00 pm. The patient walked several kilometres to a health centre. He
Hospital for further treatment. On arrival at Kerema Hospital at 10.15 am was admitted at 3.40 pm, stating that he had vomited blood, had abdominal
the following morning she was cyanosed (fingertips, toes and lips), gasping pain and headache. Four puncture wounds were evident, and the whole leg
for breath, with no radial pulse and no detectable blood pressure. Heart was wrapped with a firm compression bandage. At 4.00 pm the HR was 88
rate (HR) was 56 bpm, pupils were fixed and dilated and there was no bpm, RR 32 per minute, and BP of 110/90 mm/Hg. Lymphadenopathy was
response to spoken commands. Suction was used to clear the airway and detected by palpation. Blood taken for a 20WBCT would not clot and he
oxygen administered at 2L/min. Administration of an ampoule of CSL continued to vomit small quantities of bloodstained material.
polyvalent antivenom was attempted at 10.25 am, but no vital signs were After standard premedication infusion of one ampoule of CSL polyvalent
present and death was pronounced at 10.40 am. antivenom diluted in 450 ml normal saline (20 drops/min) commenced at
Case #2 4.30 pm (Figure 2). At 5.00 pm the HR was 92 bpm; BP 90/70 mm/Hg;
A woman (52) presented at a rural Health Sub-Centre at 12.45 pm. She had temperature 38.5°C; and he complained of chills and further abdominal
seen a bandicoot running through grass in front of her, and a “long, pale black pain. Vomiting of bloodstained liquid continued. At 5.30 pm the BP was 81/69
snake” chasing it had bitten her on the leg. Two bleeding puncture marks mm/Hg and on UHF radio advice from physicians at PMGH antivenom
were found. A standard 20 minute whole blood clotting time (20WBCT) infusion was suspended and replaced with 1000 ml Hartmanns solution.
test at 1.25 pm clotted within 15 minutes. An intravenous line was established Blood taken for a 20WBCT at 6.00 pm failed to clot. HR was 80 bpm; BP 84/
and the patient placed under observation. At 9.30 pm bilateral ptosis, 70 mm/Hg; temperature 39.0°C; and RR of 32 per minute. An IDC was
dysarthria and diplopia were noted and she was premedicated with 25 mg inserted but only 20 ml of urine was obtained. At 7.00 pm the HR was 96
IV phenergan and 0.25 ml SC adrenaline. Tachycardia (128 bpm) and bulbar bpm; BP 90/70mm/Hg; temperature 38.9°C; and RR 36 per minute. 200 mg IV
paralysis developed, and RR dropped to 13 per minute. Although drowsy, hydrocortisone was given and antivenom infusion reinstated concurrently
she spat out bloodstained saliva when roused. Infusion of one ampoule of with the Hartmanns solution.
CSL polyvalent antivenom was commenced at 9.45 pm and she was referred No further antivenom was available and extensive efforts to secure transport
by road to a larger health centre. On arrival at 2.30 am, pronounced bilateral to transfer the patient to PMGH failed. Heavy rainfall that evening increased
ptosis, diplopia, bulbar paralysis and conspicuous bleeding from the gums the chances of the road being impassable in any event. Hourly observations
were observed. Tachycardia (116 bpm) persisted, with BP 130/90, and RR of with an emphasis on evaluating the patient for the development of any signs
24 per minute. She was unresponsive to verbal commands and became of neurotoxicity were taken throughout the night, and the 20WBCT was
comatose. Further premedication was followed by two ampoules of CSL repeated at 2 hour intervals until midnight and then again at 6.00 am the
polyvalent antivenom, commencing at 3.00 am. Suction was used to clear next morning. The compression bandage was removed from the upper leg
airways. At 4.50 am she stopped breathing with no discernible peripheral at 1.00 am, but the lower limb was left firmly bandaged until 9.00 am. Blood
pulse or heart beat, fixed and dilated pupils, and cold extremities. Death remained incoagulable at 8.00 pm and 10.00 pm, but clotted within 11 minutes
was pronounced at this time.
ANNALS OF THE ACTM 7
3. at midnight. At 1.00 am the patient was moved to the Ward, and by 6.00 am
his fever had subsided to 37.0°C, HR 60 bpm; BP 90/70 mm/Hg; RR of 24 per
minute. Blood taken for a 20WBCT at 6.00 am clotted in less than 5 minutes.
At 7.00 am he was sitting up in bed proclaiming himself well, asking for food,
and wanting to be allowed to return home with family members. Despite
slightly hazy vision at distance there were no signs of neurotoxicity. He was
discharged home later that afternoon.
Case #4
A man (50) bitten twice on the right foot by a “Papuan black”, vomited at
home, and was admitted to the health centre with incoagulable blood
(20WBCT: >15 mins), lymphadenopathy, ptosis, dysarthria, dysphagia and
dsypnoea. A compression bandage was applied and after premedication
with 25 mg promethazine and 0.5 ml adrenaline he received one ampoule of
CSL Black Snake Antivenom diluted in 500 mls 0.9% NaCl. Ptosis, dysphagia,
dyspnoea and bulbar paralysis worsened and he was referred to PMGH but
died during transport due to asphyxiation.
Case #5
A boy (12) bitten by a “Papuan black” on the right leg at 3.30 pm presented
at a rural Health Sub-Centre having vomited once, and had a clotting time of
14 minutes by 20WBCT. At 9.00 pm he developed abdominal pain, ptosis
and vomited (twice), and was referred to another local health centre due to
a lack of transport to take him to PMGH. At the second health centre ptosis,
diplopia, dysarthria, dysphagia and excessive pooling of saliva in the pharynx
were noted. He was premedicated and given one ampoule of CSL Black
Snake Antivenom, but died during subsequent transport by ambulance to
PMGH.
Case #6
A teenage boy (16) presented at a Health Sub-Centre at 7.50 pm with a
history of snakebite, but with no signs or symptoms. A local traditional
remedy (“blackstone”) was applied and the patient sent home. At 6.00 am TABLE 1 SIGNS AND SYMPTOMS OF ENVENOMING IN NINE PATIENTS SUSPECTED OF
the following morning he was brought back to the Health Sub-Centre with HAVING BEEN BITTEN BY PAPUAN TAIPANS (Oxyuranus scutellatus canni)
lymphadenopathy, ptosis, diplopia, dysarthria, dysphagia, bulbar paralysis,
dyspnoea and incoagulable blood with bleeding from the bite site. He was Case #9
referred to a larger Health Centre where 0.5 ml adrenaline, 25 mg A girl (10) bitten by an unidentified snake under a village house was admitted
promethazine and one ampoule of CSL Death Adder Antivenom were infused, to a rural Health Centre at 6.30 pm. She was afebrile with tachycardia (120
however he died during transport to PMGH. bpm), RR of 24 per minute and bilateral ptosis. Blood taken for a 20WBCT
Case #7 failed to clot. No antivenom was available and arrangements were made for
A man (26) was found unconscious in the bush and was taken to a rural transfer to PMGH. At 8.15 pm she was febrile (38.5°C) with HR of 103 bpm,
Health Sub-Centre at 2.00 pm. He was bleeding from the nose and mouth, RR of 20 per minute and BP of 90/50 mmHg. Bilateral ptosis, dysarthria,
had pronounced bilateral ptosis, diplopia, dyspnoea, dysphagia and peripheral dysphagia and lymphadenopathy were noted. At 8.35 pm the HR was 172
limb weakness. A 4.5% dextrose infusion was established and he was referred bpm with RR of 30 per minute. The patient died during transfer to PMGH.
to a larger health centre for further treatment. On admission to this centre
at 4.00 pm he was febrile (39.5°C) with HR of 186 bpm and laboured RR of DISCUSSION
38 per minute. Blood pressure was not measured. Blood taken for a
Rural Health Centres in PNG operate under basic conditions. Many lack
20WBCT was incoagulable. Ptosis, dysphagia, and dyspnoea along with
reliable power, and only some have solar or gas powered vaccine
bleeding from the bite site, and vomiting of blood stained emesis were
refrigerators. Medical facilities and equipment are limited and few have
noted. 25 mg of IV promethazine and 0.25 ml SC adrenaline followed with
either the equipment or training for the resuscitation or ventilation of
one ampoule of CSL polyvalent antivenom, 2 ml IV Crystapen and 0.5 ml IM
patients. Most routine pathology functions are unavailable. They are however
tetanus toxoid produced no improvement, and he died at 4.55 pm.
staffed by dedicated health workers who accept these limitations and
Case #8 consistently endeavour to provide their communities with the best possible
A mother (37) of five was bitten on the right calf by a large “blacksnake” at medical services. Most are supervised by Health Extension Officers, and
approximately 9.00 am while working in the garden. She walked 3-4 while these personnel are not physicians they quickly acquire extensive
kilometres to the main road but it was not until late afternoon that her practical experience in managing medical emergencies.
husband was finally able to persuade a motorist to take them to a health
For rural health workers, snakebite is a serious medical emergency. Eight of
centre 30 kilometres away. On arrival at 7.20 pm she complained of headache
the nine cases presented here were fatal. Reported signs and symptoms
and backache and had a HR of 92 bpm and RR of 24 per minute. A firm
support the involvement of Oxyuranus scutellatus canni as the biting species
compression bandage was applied to the bitten limb. Blood taken for a
(Table 1). Administration of polyvalent antivenom was delayed by more than
20WBCT failed to clot and ptosis, diplopia, dysarthria, dysphagia and
five hours in four fatal cases, and three further deaths resulted following
dyspnoea were present. 0.25 ml SC adrenaline, 25 mg IV promethazine, 0.5
administration of other CSL antivenom products. A further death occurred
ml Crystapen, 0.5 ml tetanus toxoid and one ampoule of CSL polyvalent
where no antivenom was available. In two cases the administration of
antivenom were administered. At 9.00 pm she was semi-conscious with HR
antivenom was delayed by more than six hours despite clear evidence of
of 98 bpm, BP of 130/90 mmHg and RR of 20 per minute. She became
incoagulable blood.
cyanotic and died of asphyxiation at 12.30 am.
8 ANNALS OF THE ACTM
4. Administering the correct antivenom is crucial. CSL Black Snake Antivenom ACKNOWLEDGEMENTS
is purchased in large quantities by the PNG Department of Health due in
large part to the widespread perception that most snakebites are caused by DW wishes to acknowledge the support and assistance of his project
“Papuan blacks”. Medical evidence shows that the Papuan black snake supervisors Dr IH Kevau (UPNG), Dr GW Hiawalyer (PNGHealth), Dr
(Pseudechis papuanus) is responsible for very few cases of snakebites in PA Leggat and Dr R Müller (JCU). Thanks are also due to Dr W Wüster
Central Province1, and extensive fieldwork throughout southern PNG over and Ms R Welton for assistance with fieldwork; and to the staff at the
the past decade by the senior author and others has only located a few many health centres in PNG who have eagerly assisted the ongoing
specimens in Western Province. By comparison Oxyuranus scutellatus canni research project. We also thank Dr K Winkel, Dr W Wüster and the
are extremely abundant. CSL Black Snake and CSL Death Adder antivenoms ACTM’s anonymous reviewer for constructive criticism of this article.
are ineffective in treating bites by Oxyuranus scutellatus canni. Health workers DW’s research is funded by contributions and support from Independent
should be trained to look for and recognise coagulopathy as an indicator Group Ltd (PNG), Air Niugini, Curtain Brothers (PNG) Pty Limited and
for administration of polyvalent antivenom and the acquisition of CSL Black Wilsha Holdings Pty Ltd.
Snake antivenom discontinued until such time as cost effective bedside
diagnostic tests become available. CSL Death Adder antivenom should not REFERENCES
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nerve cell degeneration within as little as one hour post-exposure which wantaim, raka hebou (“walking together”) MJA 2001 175:648-651
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phospholipases A2, notexin and taipoxin. Exp Neurol. 2000 161:517-526.
within 24 hours, with subsequent reinnervation taking up to 28 days14. 15. CAMPBELL CH, YOUNG LN. The symptomatology, clinical course and successful
Previous authors have observed that antivenom poorly reversed the treatment of Papuan elapine snake envenomation. MJA. 1961 478-486.
neurotoxic effects of Oxyuranus scutellatus canni venom1,4,9,15-20, and in each 16. CAMPBELL CH. Antivenene in the treatment of Australian and Papuan snake bite.
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17. CAMPBELL CH. Clinical aspects of snake bite in the Pacific area. Toxicon 1969 7(1):25-8.
neurotoxicity was pronounced prior to administration. In one case the 18. TREVETT AJ, LALLOO DG, NWOKOLO NC, et al. Analysis of referral letters to
patient received a total of three ampoules of polyvalent antivenom. assess the management of poisonous snake bite in rural Papua New Guinea. Trans
Roy Soc Trop Med Hyg. 1994 88:572-74.
Health workers are acutely aware that their decision-making can have very 19. TREVETT AJ, LALLOO DG, NWOKOLO NC, et al. Failure of 3,4-diaminopyridine
serious consequences for envenomed patients. There are many occasions and edrophonium to produce significant clinical benefit in neurotoxicity following
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their control, such as lack of appropriate antivenom, late patient presentation,
20. WARRELL DA, LALLOO DG,TREVETT AJ, et al. Snake bites by taipans in Papua New
equipment deficiencies, lack of transportation and impassable roads conspire Guinea: Severe neurotoxicity and haemostatic dysfunction; limited efficacy of specific
to produce poor outcomes. With so many factors weighed against them it antivenom. Toxicon. 1992 31(1):264.
is imperative that a consistently appropriate strategy be developed for 21. BELL KL, SUTHERLAND SK, HODGSON WC Some pharmacological studies of
venomfrom the inland taipan (Oxyuranus microlepidotus) Toxicon 1998 36(1):63-74.
managing envenomed patients. As can be seen in the cases presented here,
22. BELL KL, KEMP BK, MCPHERSON GA, HODGSON WC The smooth muscle
delays, errors and inconsistencies in treatment can have lethal consequences. relaxant effects of venom from the inland taipan (Oxyuranus microlepidotus) Toxicon
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The cases presented demonstrate the need to develop patient management
protocols appropriate to remote settings that emphasize early recognition
of systemic symptoms, widespread use of appropriate first aid measures to
slow or limit venom absorption, consistent and accurate patient monitoring,
and ideally, the earliest possible administration of appropriate antivenom.
The use of simple diagnostic markers such as 20WBCT in monitoring patient
response to treatment should be considered. A further strategy involving
use of manual ventilation using anaesthetic bags by relays of family members
requires investigation. Where health resources are limited, simple
techniques and strategies that have the potential to offer real improvements
in patient outcomes after envenomation should be rigorously explored. ANNALS OF THE ACTM 9