A substantial degree of immunologic cross-reactivity is demonstrated among yellow jacket (YJV), yellow hornet (YHV) and white-faced hornet (WFHV) venoms and between the vespid venoms and paper wasp venom (PWV) by RAST inhibition studies of individual sera from allergic patients. Cross-reactivity is shown to be complete, partial or absent in various cases. In many cases RAST inhibition studies a...

I. Humans and Hymenoptera Venoms 509 II. Stings and Statistics 510 III. Psychological Aspects 516 IV. Historical Perspectives 518 V. Medical Causes of Venom Allergy 521 VI. Biochemistry of Venom Allergens 522 VII. Cross-reactivity between Taxa 524 VIII. Reactions to Hymenoptera Stings and Clinical Symptoms of Venom Hypersensitivity . . 527 A. Normal Nonimmune Responses to Hymenoptera Stings 527...

Objectives: The present study focuses on development of novel Metal-Herbal Nano composite (MHNC) formulation against Naja naja and Bungarus Caeruleus venoms animal models. Methods: were procured from Irula snake catchers society in lyophilised forms. Herbal-metal nanocomposites prepared 1:1 combinations. Single strength concentration Leucas zeylanica extracts copper oxide metal nanoparticles wa...

During the past eight years the senior author has been engaged in testing the pharmacological action and therapeutic properties of Indian snake venoms. Chopra and Chowhan (1932 and 1935) showed that the efficacy of the cobra and other snake venoms in relieving the pain of malignant growths and of neuritis and neuralgias was probably due to the presence of such active principles as neurotoxin. The

There is limited information on the cross-neutralisation of neurotoxic venoms with antivenoms. Cross-neutralisation of the in vitro neurotoxicity of four Asian and four Australian snake venoms, four post-synaptic neurotoxins (α-bungarotoxin, α-elapitoxin-Nk2a, α-elapitoxin-Ppr1 and α-scutoxin; 100 nM) and one pre-synaptic neurotoxin (taipoxin; 100 nM) was studied with five antivenoms: Thai cobr...

Stings of hymenoptera can induce IgE-mediated hypersensitivity reactions in venom-allergic patients, ranging from local up to severe systemic reactions and even fatal anaphylaxis. Allergic patients' quality of life can be mainly improved by altering their immune response to tolerate the venoms by injecting increasing venom doses over years. This venom-specific immunotherapy is highly effective ...

Phylogenetic analyses of toxin gene families have revolutionised our understanding of the origin and evolution of reptile venoms, leading to the current hypothesis that venom evolved once in squamate reptiles. However, because of a lack of homologous squamate non-toxin sequences, these conclusions rely on the implicit assumption that recruitments of protein families into venom are both rare and...

Surprisingly little is known of the toxic arsenal of cnidarian nematocysts compared to other venomous animals. Here we investigate the toxins of nematocysts isolated from the jellyfish Olindias sambaquiensis. A total of 29 unique ms/ms events were annotated as potential toxins homologous to the toxic proteins from diverse animal phyla, including cone-snails, snakes, spiders, scorpions, wasp, be...

platelet aggregation inhibitory effect and anticoagulant properties of fractions separated from the venoms of cerastes persicus fieldi and echis carinatus were investigated. the partial fractionation was performed on a sephadex g-100 column. two fractions separated from cerastes persicus fieldi showed anti platelet aggregation activity on adp (200 µm)-induced platelet aggregation (ca 80% inhibi...

background : antivenom is still widely used in the treatment of envenomation as there are no vaccines or other effective agents available against animal venoms. recently, neurotoxins named birtoxin family have been described from parabuthus transvaalicus and androctonus crassicauda. the aim of the present study was to test the antibirtoxin antibodies for their ability to neutralize the lethal e...