Climate change and the increase of human population will threaten conservation of Asian cobras

Characterization of plant produced VHH antibodies against cobra venom toxins for antivenom therapy

Cobra (Naja kaouthia) venom contains many toxins including α-neurotoxin (αNTX) and phospholipase A2 (PLA2), which can cause neurodegeneration, respiratory failure, and even death. The traditional antivenom derived from animal serum faces many challenges and limitations. Heavy-chain-only antibodies (HCAb), fusing VHH with human IgG Fc region, offer advantages in tissue penetration, antigen binding, and extended half-life. This research involved the construction and transient expression of two types of VHH-FC which are specific to α-Neurotoxin (VHH-αNTX-FC) and Phospholipase A2 (VHH-PLA2-FC) in Nicotiana benthamiana leaves. The recombinant HCAbs were incubated for up to six days to optimize expression levels followed by purification by affinity chromatography and characterization using LC/Q-TOF mass spectrometry (MS). Purified proteins demonstrated over 92 % sequence coverage and an average mass of around 82 kDa with a high-mannose N-glycan profile. An antigen binding assay showed that the VHH-αNTX-Fc has a greater ability to bind to crude venom than VHH-PLA2-Fc.

Barriers to the hospital treatment among Bede snake charmers in Bangladesh with special reference to venomous snakebite

Snakebite envenoming is a potentially life-threatening global public health issue with Bangladesh having one of the highest rates of snakebite cases. The Bede, a nomadic ethnic group in Bangladesh, traditionally engages in snake-related business such as snake charming. The Bede relies on their own ethnomedicinal practitioners for snakebite treatment while there is a lack of concrete evidence on the effectiveness of such ethnomedicinal treatment. To identify the barriers to the utilization of biomedical treatment for snakebite we conducted interviews with 38 Bede snake charmers, who have experienced snakebite, and six family members of those who died of snakebite. Our results show that four critical barriers, Accessibility, Affordability, Availability, and Acceptability (4As), prevented some of the Bede from seeking biomedical treatment. Moreover, we found that a few Bede died of a snakebite every year. There are survivors of snakebite who were able to receive biomedical treatment by overcoming all of the 4As. Our results provide insights into the current state of snakebite treatment in Bangladesh and can inform the development of more effective and accessible treatment options for those affected. Partnership between the public sector and the Bede community has the potential to make a significant impact in reducing snakebite morbidity and mortality in Bangladesh.

A case series of samar cobra, Naja samarensis Peters, 1861 (Elapidae) envenomation

The Samar cobra, Naja samarensis Peters, 1861 is one of the World Health Organization's category I venomous snakes in the Philippines. Although N. samarensis is known to inhabit Eastern Visayas, unlike N. philippinensis in Luzon, no clinical case reports have yet been published in the international literature. No immuno-diagnostic assays have been developed for venomous snakes in the Philippines, even for research purposes. Therefore, identification of the causative snake in hospitals is challenging. In vivo pre-clinical tests using mice showed that locally-produced antivenom raised against N. philippinensis venom ["Purified Cobra Antivenom (PCAV)"] cross-neutralised N. samarensis venom. Here, we present five snakebite envenomation cases where causative snakes were confirmed in photos as N. samarensis by an expert local herpetologist. Patients' symptoms and signs varied, from mild to extensive local cytotoxic to systemic neurotoxic envenomation. In one case, venom had been spat into the eye. Out of five patients, two underwent surgical debridement of necrotic tissue at the bite site. One paediatric patient was intubated because of cardiopulmonary arrest. Except for the spitting cobra case, four cases were successfully treated with PCAV and supportive management. These are the first clinical case reports of confirmed N. samarensis envenomation.

Snakebite Envenomation, Attitudes, and Behavior toward Snakes in Banten, Indonesia

Simple Summary

Globally, snake populations are in decline, with conservation efforts hindered by negative attitudes. Meanwhile, snakebite envenomation has been recognized as a serious public health issue, particularly in rural areas where humans and snakes coexist. This study reports the results of a survey conducted in Banten, Indonesia, with the aim of exploring relationships between respondents’ experiences, attitudes towards snakes, and behaviors towards snake populations. Our results indicate that snakebite envenomation presents a real threat in our study area, and that venomous snakes are regarded as highly dangerous. Individuals who had heard of others experiencing venomous snake bites were more likely to want populations of venomous snakes to decrease, and those with negative attitudes towards snakes were also more likely to engage in anti-conservation (“try to kill”) behavior. Women were more fearful than men, and women and those with lower education levels were more negative toward non-venomous pythons, suggesting that tailoring snake conservation efforts to specific groups based on experiences, education level, and attitudes may increase effectiveness. We propose that greater community knowledge of snakes and increases in local resources and preparedness can also contribute to accomplishing both snake conservation and improved public safety through prevention of snakebite envenomation.

Abstract

Snakes are commonly associated with feelings of anxiety or disgust, and snake conservation is often hindered by negative attitudes and perceptions. Although global snake populations are generally in decline, snakebite envenomation (SBE) continues to be recognized as a serious public health issue, particularly in rural areas of tropical and subtropical countries. Data on SBE, a neglected tropical disease, are lacking, and Indonesia, a hotspot of venomous snake diversity, has no snake bite reporting system. We analyzed 127 survey results in Banten, Indonesia with the aim of documenting SBE and exploring the relationships between respondents’ experiences, attitudes, and behaviors toward snakes. Nine percent of respondents had experienced SBE, and knowledge of SBE incidents was associated with negative attitudes toward snake populations, with negative attitudes toward snakes associated with a higher likelihood of anti-conservation behavior. Women were more fearful than men, and women and those with lower education levels were more negative toward pythons (Malayopython reticulatus), suggesting that increased knowledge may aid in snake conservation efforts. Universally negative risk beliefs and attitudes toward venomous snakes indicate a need to reduce the threat of SBE in our study area.

A Proposed Safari Park in a Subtropical Forest in Northeastern Bangladesh Will Be Detrimental to Native Biodiversity

Biodiversity in tropical and subtropical forests are at high risk of decline due to rapid anthropogenic development. Planned activities that potentially benefit communities near forests are often undertaken at the expense of forest biodiversity. Recently, the Government of Bangladesh released plans to develop a safari park in Lathitila forest in northeastern Bangladesh. This mixed evergreen, stream-fed, trans-border forest harbors 26 globally threatened species. The proposed plan aims to bring several exotic game animals such as the lion (Panthera leo), spotted hyaena (Crocuta crocuta) and cheetah (Acionyx jubatus) to be maintained in captivity. Additionally, exotic bird aviaries, gardens, a dolphinarium, a marine aquarium exhibit, and a carp pond have been proposed for construction. Here, we (i) summarize some of the key attributes of safari parks and the misconceptions associated with them; (ii) highlight some of the planned development activities of the proposed safari park; (ii) list the threatened species found in the area, and (iii) explain why establishing a park in the area would be detrimental the region’s biodiversity. We urge the government to abandon the plans to develop a safari park and suggest that the area be brought under formal protection for the benefit of biodiversity conservation.