Friday, August 15, 2025

UDLCO CRH: What is the efficacy of antivenoms as a pharmacological intervention in the management of acute snake envenomation?

Summary:


This conversational data reflects frontline and experiential insights on snakebite envenomation, particularly in Indian rural and urban settings. It highlights the risks of venomous snakes like vipers, cobras, kraits, and discusses the challenges in managing bites, including anti-snake venom (ASV) availability, misuse, and variable efficacy. The necessity of timely ASV administration is emphasized along with supportive treatments like dialysis and ventilation. There is discourse on traditional healer roles and AI-assisted diagnostic tools (like image recognition apps) to distinguish snake species for accurate treatment. The discussion also reflects skepticism toward western evidence-based medicine models while valuing empirical knowledge in local contexts. Key complications such as delayed venom effects and ARF (acute renal failure) emerge as critical concerns in treatment outcomes.


Keywords:


- Snakebite envenomation  
- Anti-snake venom (ASV)  
- Viper, Cobra, Krait, Python  
- Hemotoxic, Neurotoxic venom  
- Acute renal failure (ARF)  
- Supportive care (dialysis, ventilation)  
- Traditional healers  
- AI diagnostics in medicine  
- Empirical vs. Evidence-Based Medicine  
- Public health and snakebite management  



Conversational Transcripts:
[04/08, 05:35]hu1: Facing a snake 1st time in my life
[04/08, 05:35]hu1: Not going to hide it. Saw death with fear in my eyes. Was already calculating money will and which hospital would be best for ASV - Anti Snake Venom
[04/08, 05:35]hu1: ASV is manufactured only in King Institute, Guindy. Due to lack of expertise in treating snake bites, Dr especially in ICUs tend to overuse it. Stock runs out fast
[04/08, 05:35]hu1: Simply coz their venom is deadly. Vipers are hemolytic cobra krait are neurotoxin. 30 max, it kills. They evolved to use it to hunt for food. We are the one intruding on their environment
[04/08, 05:35]hu1: This fellow is a baby python. 3 foot Mama had visited kutchen few weeks ago. So I told thomas to call the local snake catcher and find their nest. Atleast 20 eggs and babies will be there for sure
[04/08, 05:40]hu1: RFS - reason for sharing: Google AI was used by a friend to parse my video and correct me that this is a baby reticulated python and not a viper.
How can we deliver this in my ED? Every practising Dr should have this astra in kitty to assist. Isabel healthcare was a beginning, POEM & PROSE were tried, Infobutton was cool, Watson was to send all doc home. Aint happen 😉🤔😆
[04/08, 05:40]hu1: AI HAL built into an app that any doc can download that can read a pic or video and give DD
[04/08, 05:42]hu1: Hence dogs have been with man since stone ages for their pure loyalty. Unbelievable how this 14 year old grandpa protected us, ignoring his masters commands
[04/08, 08:46]hu4: Reminds me of my days at Amrita, you know snakes just get into the house and go to the opposite side and it's very common. These include Cobra too!
My son was 6 months old and one day a snake passed by, i was in hospital and my wife's shouting made my neighbours rush in. Thier first reaction was: laughter! 
They said it's very common for snakes including venomous ones to come into home but nothing to be worried. 
After that we have had 4 encounters in 6 months!!!!
[04/08, 09:01]hu3: Traditional healers also treat snake bites. Using herbs. Covered under QCI certification schene!!!
[04/08, 09:42]hu1: I don't know what they treat. I can tell you if bitten don't experiment. Atleast we know ASV works
[04/08, 09:49]hu3: Someone shld study what they do!!!
[06/08, 06:34]hu1: Google helped allay my fear that it could be a viper. This is baby python
[06/08, 06:34] ATP: Try it. Just check with perplexity or grock
[06/08, 08:44]hu2: Pythons move sluggishly while vipers are swift
[06/08, 09:02]hu1: True
[06/08, 09:01]hu1: Viper venom is hemotoxic, kills in few hours
[06/08, 09:15]hu2: Yes we regularly manage these patients.
Here's a past case report from our open EMR archive 👇
https://nikhilasampathkumar.blogspot.com/2023/07/introduction-this-is-online-e-log-entry.html?m=1
After 4 days:
[11/08, 06:38]hu1: Grew up on CLRI campus. Have been exposed to snakes since childhood, have a healthy respect for them. We intrude into their space. Never the other way. As a medStudent and intern managed many cobra, krait, sawtooth scaled viper and russels viper victims in Porur. It was a very rural ecosystem at that time. These are the 4 species that are poisonous. Rest are safe. Indian python is not big enough to be a threat to us. Those in South Asia and Brazil are evil. Anaconda is similar.
My fear of snakes hence is from knowing the consequences of a bite. I think we all should be safe rather than sorry.
[11/08, 06:38]hu1: https://chennaisnakepark.in/
[11/08, 06:44]hu1: These are the points where a reliable authentic source of information both for the healer and the one seeking help goes a long way in allaying unnecessary fear.
We have seen people horrified after a snake bite. Sometimes the venom is retained in muscle and gets released when we mobilize patient in wards. I have seen patients die after 10 days of cobra bite.
Our Kings Institute Guindy Chennai produces ASV - Anti Snake Venom by injecting venom from these 4 dangerous species unto horses. Their body produces antibodies that are then purified and used to help manage human snake bites.
Cobra Krait are neurotoxic. Vipers are hemotoxic. Pythons and Anacondas are constrictors. All of them have this capability to hunt prey and feed. We come in the middle...and then complain 🙄
[11/08, 06:48]hu1: My military school seniors were having a laugh saying: ithna chota snake se darr gaya. Don't be fooled by size. Vipers are about 20 cm but easily take down a man.
Both are very painful death, whether neuro or hemo toxic. ASV is not 100% effective and some patients react to this foreign protein.
Prevent 》Treat. Always
[11/08, 08:32]hu2: We have lots of cobras in our garden! 
https://www.facebook.com/share/v/19cQmkXXPN/?mibextid=oFDknk
[11/08, 08:34]hu1: U r a brave man. The hatchlings carry venom like their mama. Don't make me come to kukatpally to treat you. 🤦🏽‍♂️
[11/08, 08:39]hu1: ASV is not effective at all!
Most of the successes of snake bite management appears to be due to supportive management like dialysis and ventilation. People have brought down the dose of ASV by 50 to 70% in controlled trials and the effect appears same. http://www.ncbi.nlm.nih.gov/pubmed/10778516http://www.ncbi.nlm.nih.gov/pubmed/15909856http://www.ncbi.nlm.nih.gov/pubmed/15633711http://emj.bmj.com/content/22/6/397.abstract
The above are trials based in India. It is possible that the low dose anti-venom could have been gradually in subsequent trials brought down to zero!
[11/08, 08:40]hu1: We live far from Kukatpally, in a village near Hyderabad
[11/08, 08:44]hu1: I object milord. ASV does save lives. Dialysis and Ventilation are like 7th 8th step in a path from 0 to 10. I despise going there
[11/08, 08:45]hu1: Keep away from those critters Prof. Your students ❤️ you
[11/08, 08:46]hu2: Check out the evidence!
[11/08, 08:46]hu2: Yes cobras are very sensitive creatures. Even when we work in the garden they either slither away further or provide a distinct hiss like warning
[11/08, 09:23]hu1: I am a practioner of empirical & experience. EBM is a western concept. We can debate how much it is relevant to the orient. Occidental <> Oriental are north and south poles. Twine rarely converge.
Conversational Transcripts from another group:
[15/08, 10:01]hu5: Real snake bite
[15/08, 12:52]hu2: Did they see the snake or bring a picture of it?
[15/08, 13:11]hu5: Yes they killed it, person who got bitten ran back and killed the snake
[15/08, 13:27]hu5: Our patients often bring their snake's photograph that helps to plan their care pathway in a better way👇
https://pajrcasereporter.blogspot.com/2025/08/snake-bite-projr.html?m=1
[15/08, 14:27]hu5: Same description patient was giving
[15/08, 14:28]hu5: Russell's viper?
[15/08, 14:31]hu5: Many differentials:
 https://researchmatters.in/news/current-antivenom-ineffective-against-saw-scaled-viper-bite-finds-study
Difficult to confirm without a picture.
The above link again took us back to anti-venom RCTs and here's some discussion Transcripts from decades ago:
From Hu2
Date: Tue, 19 Feb 2008, 21:59
 
We used to see a very interesting envenomation in Nepal which was from a semi poisonous green pit viper. 
 
The envenomation was chiefly manifested in local swelling and a deranged coagulation and was never life threatening.
 
We also had the opportunity to report an unusual complication of antivenom (the use of which was perhaps as we learned gradually not required for that kind of envenomation and the local physicians never used it). The report is available here: 
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1368-5031.2004.00201.x
 
Now that you mention it I wonder if it had anything to do with quality control issues although the antivenom in question was from Serum Institute of India, Pune.
 
The other issue I had in mind was the rationale behind antivenom (although I guess it may not be relevant to the topic but would be glad if somebody threw more light on it). The antivenom which we so very unquestioningly administer in snake bites ( presumably poisonous) has often been challenged to be of dubious value as there have been no RCTs (randomised control trials) to demonstrate its efficacy (which again cannot be conducted for obvious reasons). It has been postulated that the management of snake bite may be very well accomplished by supportive therapies such as ventilators for respiratory paralysis and dialysis for renal failure. Perhaps we could have a quick feedback on this before we move on to the issues enumerated by Hu7
Hu2 on August 15, 2011
Hu9 it would be great if you could search this issue of 'antivenom evidence' further. I can provide whatever articles i have on the topic.
Also wonder what is the evidence on 'nitroglycerine?'
Hu2 on August 15, 2011
Hu9 it would be great if you could search this issue of 'antivenom evidence' further. I can provide whatever articles i have on the topic.
Also wonder what is the evidence on 'nitroglycerine?'
Hu2 on August 15, 2011
Hu9 it would be great if you could search this issue of 'antivenom evidence' further. I can provide whatever articles i have on the topic.
Also wonder what is the evidence on 'nitroglycerine?'
Hu2 on August 15, 2011
Hu9 it would be great if you could search this issue of 'antivenom evidence' further. I can provide whatever articles i have on the topic.
Also wonder what is the evidence on 'nitroglycerine?'
Hu2 on August 15, 2011
Hu9 it would be great if you could search this issue of 'antivenom evidence' further. I can provide whatever articles i have on the topic.
Also wonder what is the evidence on 'nitroglycerine?'


:-)

regards,

From Hu8 

Date: Mon, Aug 15, 2011 at 3:23 PM
Subject: Russell viper bite

This one is for sharing.

today morning when we unfurling the national flag, this 18 year old girl came at 9 am after being bitten by a juvenile of Russell viper , called Naunakhaa, bit at 7a m, 1st WholeBloodClottingTime was normal, and the one at 10 am , read at 1025 was abnormal. ASV started at 11.05 am, developed a hypersensitivity at 11.28, managed, restarted at 11.52 am, finished at 12.35 pm, meanwhile had gum bleed and some pain abdomen at 11 20 am, responded after the 10 vials of ASV. The bleeding has stopped. Lets see if she gets ARF, or recurrence of bleed. We do the next WBCT at 630 pm platelets were 98000. creat 0.7, no local bleed, though a modest swelling was there locally.

did you know that russell viper is almost the most poisonous snake that is known. and can cause ARF even if one starts the ASV for hematotoxic effects within 2 to 3 hours?


Date: Mon, Aug 15, 2011 at 6:42 PM
Subject: Re: Russell viper bite

we started a selling of torchlights programme at a big level. and are making available a CD on its prevention that we are distributing at each village level. also keeping  nitroglycerine ointments at the village level.


On Mon, Aug 15, 2011 at 4:04 PM, Hu 9 wrote:
Snake bite seems a real menace there. Any thoughts about prevention (?vigilance ?protective wearing ?habitat)...


Hu2, October 2011

Thanks for this very interesting email.

I had noticed his web site during a recent discussion on krait bite on 'tabula rasa' around one of our patients of sudden abdominal pain followed by ptosis and quadriparesis without a history of snake bite. I was wishing we could invite him to join the discussion.

He is quite convinced about AVS and i am not sure if we can get him to search the evidence around it but nevertheless it would be worthwhile to discuss this issue with him as he seems quite passionate and enthusiastic about the topic.

Would you like to invite him with the snake bite CFP to see if he can organize a few reviews around the topic and co-edit/organize the issue with you? Perhaps you could also forward him our discussions with Prof ... and Prof ... (representing two opposing world views).

Would be great if you can manage the time to do it. Hope your USMLE preparations are going good.

regards,


On Sun, Oct 2, 2011 at 8:01 PM, Hu10 wrote:


I receive mails from someone called Dr  because one of our Ids which I am in charge of is a part of his mailing list. He has shared some interesting perspective about management of snake bite cases and also the use of anti venom. Am sharing it with you for your opinion on this and if he could be a part of the debate for/against the use of AVS in India. There is another email of his in which he has made a protocol which can be followed in case of a case of snake bite. 

Have you heard of him and his work?

Look forward to hearing your inputs.

Best,


Date: Fri, Sep 30, 2011 at 6:25 AM
Subject: Viper Bite Cases
Hu11

Respected and Dear All, Starting with a good news that, our veteran coworker( 53 yrs) of ... is doing well without any dialysis . He was bitten by a Russell’s Viper at a remote island of ... while he was in a scientific show with snakes. He was bitten at 3.25 PM , and AVS treatment was started at  Hospital at 5.50 PM on 26th Sept 2011. Though he suffered a fainting attack in the boat on the way to hospital and developed bleeding disorders , he was perfectly managed by the S D Hospital. We shifted him to tertiary hospital on 27th for monitoring of Kidney function. He is all right till 29th evening.


   On the contrary , 46 yrs, M, of Nera village , near ... was admitted at rural Medical College on 26th Sept  at 4 PM with definite signs of Viper bite. He did not get any AVS till 8 PM on 27th and developed kidney complications , transferred to tertiary hospital, no bed there , got a floor bed at another Hospital last night , waiting for dialysis.


 Another , 34 yrs , M , of Village of ,  was bitten by a Viper on 26th . No AVS at  Block PHC , nor at S D hospital , developed Kidney complications . Admitted in floor bed in tertiary on 27th for dialysis.


 Who will teach our  friends that, timely AVS treatment is the main thing for Viper bite , not Dialysis ? 



 Thematic Analysis:*


1. **Epidemiology and species identification** – Differentiating venomous snakes (viper, cobra, krait) from non-venomous (python), and importance for treatment planning.  

2. **Clinical management challenges** – ASV supply limitations, overuse by inexperienced clinicians, adverse reactions, and need for timely administration.  

3. **Role of technology** – AI and digital apps to aid rapid and accurate snake species identification to improve decision-making in emergency care.  

4. **Traditional vs Modern medicine** – Debate on herbal/traditional remedies and the challenge of integrating these with evidence-based treatments.  

5. **Supportive care importance** – Dialysis, ventilation vital for severe envenomation, but prevention and early intervention crucial.  

6. **Public awareness and education** – Community encounters with snakes, fear management, and importance of accurate knowledge dissemination.  


*Project Plan (IMRAD format):*


- *Introduction:*  

  Outline the burden of snakebite envenomation in India, highlight species involved, clinical implications, and gaps in management including ASV use and diagnosis challenges.


- *Methods:*  

  Mixed methods including qualitative data from frontline healthcare workers’ conversational transcripts, review of existing literature on ASV efficacy, and pilot testing AI diagnostic tools on snake image recognition.


- *Results:*  

  Identification of frequent misclassification of snake species causing treatment delays, ASV stock management issues, and emerging role of AI to enhance diagnostic accuracy. Evidence from transcript suggests that supportive therapies complement ASV treatment. Traditional practices lack systematic study.


- *Discussion:*  

  Integrate findings with literature pointing to the need for improved ASV protocols, incorporation of AI diagnostics, critical appraisal of traditional methods, and education campaigns for healthcare providers and communities. Discuss challenges of balancing empirical experience with Western evidence-based medicine in the local context.

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