Publications by authors named "Leela V"

The present study aims to explore the potential biomarker application of salivary heat shock 70 kDa protein in detecting thermal stress in dairy animals noninvasively. The study spans for 45 days during the mid-summer season (April-May), involving twelve multiparous non-pregnant adult Jersey crossbred cows by randomly allocating them into groups (six animals in each group). The control animals were maintained in the shed, whereas the thermal stress group animals were exposed to environment heat between 10:00 h to 16.

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Article Synopsis
  • Macrophages play a crucial role in the immune response, but cattle are vulnerable to heat stress which affects their immune cells.
  • This study investigates how high temperatures and lipopolysaccharide (a component of bacterial cell walls) impact the function and molecular response of bovine macrophages in a lab setting.
  • Findings indicate that heat and lipopolysaccharide exposure leads to increased cell death, reduced immune function, and altered gene expression, contributing to a higher risk of disease in cattle experiencing heat stress.
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Rhipicephalus sanguineus sensu lato (s.l.), the brown dog tick, transmits several important haemo-protozoan and rickettsial pathogens to dogs.

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  • Despite adequate iron levels in pregnant sows, piglet iron reserves are low, suggesting issues with how iron is transferred through the placenta.* -
  • The study found that the expression of iron regulatory proteins hepcidin and ferroportin in the placenta was linked to non-heme iron levels, inflammation, and oxidative stress.* -
  • Hepcidin showed a positive association with inflammatory markers, while ferroportin had a negative association, indicating they might regulate iron movement and inflammation at the placental level.*
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Vapour patches dispensing pheromones were evaluated as lures to increase the attractiveness of sticky tick traps for Rhipicephalus sanguineus sensu lato (s.l.).

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Tick sex pheromone (SP), assembly pheromone (AP) and their combination (SP + AP) were encapsulated in calcium alginate beads. In vitro bioassays, namely Petri dish and olfactometer assays, were employed to estimate the level of attraction of the various stages of Rhipicephalus sanguineus sensu lato, namely unfed and engorged (fed) larvae, nymphs, females, and males to the different pheromones. The study revealed that only the Petri dish assay was suitable to evaluate the response of larval stages whereas the olfactometer bioassay could also be used for evaluating the response of all other stages.

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  • In Tamil Nadu, many dairy farmers feed their cattle cooked rice, which is readily available and low-cost, leading to poor productivity and health issues.
  • A study surveyed 32 districts, revealing that 71.5% of dairy farmers provide cooked rice to their cows, resulting in increased cases of acidosis and laminitis as the quantity of rice fed rises.
  • The research indicates a strong correlation between the excessive feeding of cooked rice and health complications in cattle, highlighting an imbalance in energy and protein nutrition.
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A novel ecofriendly sticky tick trap device for the control of dog tick Rhipicephalus sanguineus using gold nanoparticle assembly pheromone complex as a bait was developed. Assembly pheromones comprising of guanine, xanthine and adenine in the ratio of 25:1:1 was encapsulated in gold nanoparticle. The response of the different stages of unfed R.

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Two combinations of assembly pheromone (AP), with and without hematin were utilized as a lure for the unfed larvae, nymph and adults of ticks. In-vitro trials were carried out with the AP encapsulated in calcium alginate beads and the response of different stages of ticks were recorded. Analysis of results revealed that rapid attraction was evident in unfed larvae exposed to beads containing AP without hematin.

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Control of brown dog tick, Rhipicephalus sanguineus was attempted by utilizing sustained release preparations of synthetic analogues of assembly pheromones. The assembly pheromone, in defined ratio, was encapsulated using poly-ɛ-caprolactone by water-in-oil-in-water double emulsion solvent evaporation technique. In the in vitro bioassay, percent mortality with test microspheres was 95.

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Evaluations were made to assess the efficacy of assembly pheromone, attractant sex pheromone and the kairomone carbon dioxide in attracting the questing larval nymphal and adult stages of the brown ear dog tick, Rhipicephalus sanguineus. Ticks attracted to one location were killed using the acaricide deltamethrin. Initially, simulated field trials were conducted to observe the percentage of attraction of ticks from different distances.

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In the current study, an attempt was made to encapsulate assembly pheromone using natural polymer, chitosan. Chitosan beads were prepared by incorporating assembly pheromone in conjunction with an acaricide, namely, deltamethrin. In the in vitro bioassay, the test beads attracted and killed 79 % of unfed larvae, 88 % of unfed nymphs and 61 % of unfed adults of the brown dog tick, Rhipicephalus sanguineus, in 24 h of exposure.

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Attractant sex pheromone (ASP) 2,6-dichloro phenol was used in the current study to evaluate the percentage attraction and the behavioural responses of the five ixodid tick species namely Rhipicephalus sanguineus, Rhipicephalus microplus (Boophilus microplus), Haemaphysalis bispinosa, Rhipicephalus haemaphysaloides and Hyalomma marginatum using petridish bioassay. Two concentrations of 2,6-DCP (0.1 M and 0.

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We describe a patient who presented with acute onset of abdominal pain, oliguria, gross hematuria and uremia. Further examination revealed spontaneous intraperitoneal rupture of the urinary bladder. Upon repair of the rupture, his biochemistry normalized within 24 h.

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