Bioefficacy of engineered Beauveria bassiana with scorpion neurotoxin, LqqIT1 against cotton mealybug, Phenacoccus solenopsis and cowpea aphid, Aphis craccivora.

Cotton mealybug, Phenacoccus solenopsis (Tinsley) and cowpea aphid Aphis craccivora (Koch) are notorious polyphagous, hemipteran sap sucking insect pests. A recombinant toxin gene 'LqqIT1' from the scorpion Leiurus quinquestriatus quinquestriatus (Ehrenberg) was cloned in the pAL1 fungal expression vector and then expressed in the entomopathogenic fungus Beauveria bassiana (Balasmo) using genetic modification techniques. The genetically transformed B. bassiana strain (BbLqqIT1-3) and its un-transformed parent strain (Bb-C) were screened to infect the third instar nymphs of P. solenopsis and first instar nymph of A. craccivora through leaf treatment and topical application (spray) method at 1 * 107 spores per ml concentration. The recombinant strain BbLqqIT1-3 was highly pathogenic against A. craccivora but non pathogenic to P. solenopsis. BbLqqIT1-3 induced 72 and 43.33% mortality in A. craccivora nymphs 96 h after leaf treatment and topical application, respectively. The nymphs of A. craccivora infected with BbLqqIT1-3 displayed classical neurotoxic symptoms such as sluggishness, solublize and liquification of the body. Crude soluble toxin protein, BbLqqIT1a-CSE and Bb-WT-CSE was extracted from the BbLqqIT1-3 and Bb-C, respectively using ammonium sulphate precipitation method, and their oral toxicity was analyzed at 5 µg/ml concentration. The survival of the studied insects was negatively affected by the crude soluble toxin extracts. The LT50 values of BbLqqIT1a-CSE against P. solenopsis and A. craccivora were 22.18 and 17.69 h, respectively. Exposure to crude soluble toxin extracts also accounted for the imbalance of ionic concentrations in the hemolymph of treated insects such as hyperpotassemia (3.53-8.18 meq/ml) in the P. solenopsis and hypopotassemia (7.52-0.47 meq/ml) in A. craccivora. The transformed fungus BbLqqIT1-3 strain exhibited promising results in invitro study.

Dermatoglyphics: Prediction for Prevention: An Innovative Tool in our Stash!

Background: Early childhood caries (ECC) has created pandemonium worldwide and so in India which is alarming and accentuates the need to foster novel and effective preventive strategies that are synergistic with the current one. There are different methods to diagnose ECC. Nonetheless, up until now, there has been no method to predict ECC. Dermatoglyphics could be considered a noninvasive and early predictor of dental caries in children, as ECC is a multifactorial disease with the influence of genetic patterns. Aim: The present study was undertaken to find out a possible relation between some quantitative and qualitative dermatoglyphic variables, ECC, and salivary bacteria. Materials and methods: The study was carried out on 200 children within the age-group of 36-72 months. The study population was divided into four groups comprising 50 individuals each based on decayed, missing and filled teeth (dmft) score and gender; group I-caries male (dmft ≥ 5), group II-caries free male (dmft score 0), group III-caries female (dmft≥ 5), and group IV-caries free female (dmft score 0). Dermatoglyphic patterns of all 10 palmar digits were recorded and assessed qualitatively and quantitatively. Results: The caries group showed maximum occurrence of whorls, which were more prevalent in females and decreased frequency of loops when compared to caries free group. There was a significant association of the whorl pattern with the microbial counts of Streptococcus mutans (S. mutans) and Lactobacillus. Conclusion: There is explicit variation in dermatoglyphic patterns between the ECC and caries-free group indicating a correlation between dermatoglyphic patterns and dental caries. How to cite this article: Shah SG, Kaul B, Gupta A, et al. Dermatoglyphics: Prediction for Prevention: An Innovative Tool in our Stash! Int J Clin Pediatr Dent 2023;16(S-1):S101-S108.