Common Krait is the most mysterious snake .It is a Neurotoxic snake , commonly seen in the rural areas of India , particularly in West Bengal . This site is built particularly to give some idea about this mysterious snake . Some case history and photograph are given here.
Common Krait ( Bungarus caeruleus) is commonly known as KALACH snake in West Bengal state of India. It is also known as " Seorchanda " or " Neorchanda" Snake; other local names are " Domna Chiti " and " Sankha Chiti. " In some area it is called as " KALA CHITI" snake. That means a black Chiti snake . One nonpoisonous snake called " CHITI" snake is confusing with this Kalach snake. Particularly baby Chiti snake may be mistaken as the dangerous Kalach Snake . See in the photogallery that the white bands are only differentiating point.
This snake ( Common Krait ) is found all over india . This is a non hooded snake. Average length is 25 inches. Longer snake of about 40 inches is rarely seen . Very slender , black colour snake is identifiable by slim white bands on it's body. Bands of nonpoisonous Woulf snake ( CHITI or Ghar Chiti ) are wider . Colour of mature Ghar Chiti is grey to yellowish ; but baby Ghar chiti may be of darker colour . But the bands are always wide in nonpoisonous one. This snake is a domestic snake . Usually feed on small insects.
VENOM : Venom of Kalach ( Common Krait ) is a Neurotoxic one . But this venom is atypical because they do not respond to Injection Neostigmine ( as in Cobra venom ).This Kalach venom causes presynaptic blockage of nerve endings . Killar ( Fatal ) dose of Krait venom is only One milligram ; in comparison , Killar dose of Cobra venom is 15 mg and that of Russell's Viper ( Chandra Bora ) 42 mg. This Kalach venom gives no local pain or swelling.
Mystery of the Common Krait bite is due to the property of it's venom , Painless bite in sleep may kill the victim in sleep.I have collected case history of such mysterious presentation of Krait bite patients. These cases would be detailed here.
1)Above two are the last slide of the scientific presentation of this author . After his very first presentation on 7th August 2007 at Habra State General Hospital , North 24-Paraganas district of West Bengal, the senior most physician of the hospital could retrospectively diagnose a case seen by him about 20yrs back at NRS Medical College , Kolkata. The physician confessed that , they could not diagnose that ill fated patient who ultimately died . The doctors of NRS MC suspected that to be a case of ceribrovascular accident and treated in that manner .
After presentation of the same slide at a seminar at Mecheda of East Midnapur district of WB on 2nd October 2009 one senior practitioner confessed that they have given death certificate to many a patients of such mysterious presentation ; in every case cause of death was written as CVA!
2) After knowing this reaction from the senior physician one staff nurse of Habra S G Hospital Gayatri told that , her elder brother in law was treated at the same NRS Medical college in the year 2004, in the department of ENT . After 3 days treatment for Tonsillitis the patient was diagnosed to be a victim of neurotoxic snake bite and was given Anti Snake Venom Serum ; the patient survived.
1) See the workshop photo in the web site www.50000snake.webs.com ; you would see Dr Rafiq of Debra Rural Hospital in the front row. Dr Rafiq was pleased to inform this " snake bite fanatic" on 9th August 2009 that, he could save one female patient of Kalach Bite.
This middle aged female patient came to Debra Rural Hospital of West Midnapur district of West Bengal in the morning of 9th August 2009. She had only complaint of " Pain Abdomen". Dr Rafiq did not find any abnormality in her abdomen . While interogating the patient doctor could notice some drooping of eye lids of the patient . Now the diagnosis was done to be a case of common krait ( Kalach) bite . 10 Vials of AVS was given rapidly IV . The patient survived. You can congratulate Dr Rafiq at 09434005487. He is doing extraordinary works on snake bite at that small hospital.
2) You can see the video of interview of this patient Tapan Bag and his mother with the treating team. Tapan Bag, 13 yrs male, presented only with pain in throat in the morning of 21st September 2009 . He was brought to the Popular Nursing Home of Mecheda , East Midnapur district of West Bengal at about 11.30 AM as he was gradually becoming unable to open his eyes. He was lucky to be diagnosed to be a case of Kalach bite as he developed total respiratory failure in a short time. He was intubated at that nursing home and was carried to Kolkata in an old ambulance with Ambo Bag ventilation. He survived after 5 days' artificial ventilation at the Calcutta Heart Research Clinic , Salt Lake , Kolkata -91.
Tapan was treated by a team of doctors at Popular NH and at CHRC . Dr Asoke Samanta ( 9433006566) suspected the case to be a Krait bite victim first. To be certain the snake was recovered from the room where Tapan slept in the last night. 10 vials of AVS was infused in the ambulance when the patient was being carried to Kolkata.
One peculiarity of this Kalach snake is that , frequently they are found in the bed of a person sleeping on the open floor. One common belief is that, the snake comes to lick sweat. This is not proved. Some authority is of the opinion that , the snake has affinity to the warmth of human body , so they come to the bed.
Any way , open floor beds in the rural areas should be avoided to prevent this snake bite. Other preventive aspects of snake bite is detailed in the book " 50000 Deaths and a Snake bite fanatic".
Rapid infusion of 10 vials of Indian Poly valent AVS at the onset of ptosis ( drooping of eye lids) is the only treatment . See and down load the most simple Flow Chart for Snake bite management in the photogallery.
See treatment regim for all Indian snakes at SLIDE No : 28 & 29 in the photo gallery of htttp://www.50000snake.webs.comwww.50000snake.webs.com
Though in scientific literature review we see that convulsion is a rare sign of Krait bite ; it was a very common feature in case of Krait bite patients of the Sundarban area of the South 24-Paraganas district of West Bengal state of India. In case of our first patient ( Tapan Bag ) convulsions started before respiratory failure.
In a publication of the " Juktibadi Sanaskritik Sanstha " of Canning ,South 24-Paraganas we see that in last 20 years dozons of Krait bite patients were treated at the Canning Sub Divisional Hospital . All the patients presented with Convulsion and most of them with pain abdomen.
Most probably time after bite is the main factor to get different signs. In case of Tapan Bag earliest symptom was sore throat ; then came ptosis. Convulsions came about three hours after ptosis. In case of the lady patient treated by Dr Rafiq at Debra Rural Hospital presenting symptom was pain abdomen , then came ptosis . See was given AVS at the stage of ptosis , so see did not deteriorate . As the Sundarban area of West Bengal is the worst in position for communication ; all most all the krait bite patients were brought to canning hospital very late. Definitely the painless bite in the open floor bed was a contributing factor for the late hospital attendance.
All the Krait bite patients of canning hospital were treated with AVS only ; Convulsions subsided first , then other symptoms.
Pain Abdomen is a very common presenting symptom in case of Common Krait bite victims. There are several case reports in the recently published " Snake Bite Help Line " book by Canning Juktibadi Sanaskritik Sanastha.
Very recently Dr Rafik of Debra Rural Hospital of West Midnapur district of West Bengal had miraculously saved life of one Sunil Hembram , 23 yrs Male patient who presented purely with pain abdomen. He was admitted into the DRH in the early morning of 25th May 2010. There was no history of any bite ; the patient was treated by other doctors for 24 hours for pain abdomen . On 26th morning Dr Rafik ( firstname.lastname@example.org) first noted PTOSIS in the patient . And he suspected it to be a case of Krait bite . The patient was treated with 10 vials of AVS and survived.
So , PTOSIS may come even after 24 hrs of Common Krait bite . And AVS at the onset of Ptosis is life saving in a case of Common Krait bite.
One Patient named Zakir Hossain Sardar , 21 yrs , male from Belegachi Village of P.S: Baruipur , Dist : South 24-Paraganas , West Bengal was brought to the Canning Subdivisional Hospital at 8 AM on 29th May 2010.The patient was confused and had signs like hemiperesis of Rt. side of body. The patient had ptosis. On interrogation the Emergency Medical Officer , Dr. Ujjal Halder ( 9433353269) got some positive history to suggest a Kalach ( Common Krait ) bite. The patient was treated by Dr Halder with IV infusion of 15 vials of Indian Poly Valent AVS and survived.
What was the history from the patient's relatives ? There was no history of any bite. Most relevant history was open floor bed in the previous night. Sudden pain abdomen broke the sleep of the patient . Then there was vomiting for one time only . Whole body ache and blurring of vision came latter on in that order.
This was a case of typical presentation of Kalach snake bite . Pintu Naskar , 35 yrs, Male of Mousal village , near Kolkata Leather Complex , of South 24-Paraganas district of Paschimbanga attended the emergency of N R S Medical College , Kolkata on 14th August 2011 in the early morning . Pintu gave a history of something bitten him from out side the bed net of his floor bed. He was suffering from pain abdomen only when he came to the hospital. Pintu was kept in observation and discharged at 10.00 AM. He was admitted at the Calcutta National Medical College & Hospital , in Male paying Bed No. 227 , at 12.10 PM. There also he got treatment for pain abdomen at first. In the evening Pintu complained of Dysphagia ( difficulty in swallowing ) and drooping of eye lids. Now he was diagnosed to be a case of Neurotoxic Snakebite by one lady House Staff ( Dr . Sreejita Bhowmick) . Pintu was infused with 10 vials of Indian Poly- valent AVS ; and was cured. See the page 15 of a publication by Raptacos, Brett & Co. Mumbai.