Publications by authors named "Ankan De"

Pigs breeds are an important livestock species mostly reared by economically lower incomesection of people in India. Within North-Eastern (NE) states, pig husbandry is very much popular hence maintain the livelihood of the rural native population. Gastrointentinal (GI) parasitic infectionisone of the major constraint in profitable pig production in this area.

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In this study, the efficiency of one commercial (ProteoMinerâ„¢ -PM) and five simple and cost-effective laboratory chemicals (Acetone, TCA/acetone, DTT, ACN and DTT-ACN) based serum protein pre-fractionation strategies was compared in pig model by label-free quantitation based mass spectrometric approach to find out the most suitable strategy for reducing the complexity of serum proteome for subsequent proteomic studies. The highest serum protein depletion percentage and highest depletion of albumin, the most abundant serum protein, was observed in DTT-ACN method. The maximum number of serum proteins was identified in ACN followed by DTT-ACN method and importantly, detection of more number of low-abundant proteins (LAPs) could also be achieved by these two methods.

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In this study, the comparative serum proteome profile of Day 5, 12 and 16 of gestation, representing three early embryonic events, namely formation, elongation and implantation of blastocysts, and non-pregnant control were explored by a label-free quantitation-based mass spectrometric approach to identify early pregnancy biomarkers in pigs. A total of 131 proteins were identified with respect to different groups, out of which 105 were found to be differentially expressed proteins (DEPs). Among the DEPs, 54 and 66 proteins were found to be up and downregulated respectively in early pregnancy groups (fold change >2) and the maximum number of upregulated proteins was observed in the Day 12 pregnancy stage.

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Bluetongue (BT) is a notifiable multiple species transboundary viral disease of domestic and wild ruminants. Though the disease is enzootic in India, little is known of the disease burden and prevalent serotypes in Tripura, a hilly state of northeastern India sharing a vast porous border with Bangladesh. A surveillance study was conducted to understand the disease burden in goats in Tripura.

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Article Synopsis
  • This study is the first confirmed case of contagious ecthyma caused by the orf virus in Black Bengal goats in Tripura, India, showcasing high morbidity rates (58-67%) but low mortality (8-10%) and case fatality (11-15%).
  • Molecular analysis of the virus revealed specific genetic mutations that may be important for understanding its epidemiology and links to other Indian strains, particularly one from North India.
  • The report emphasizes the need for thorough investigations of orf outbreaks in vulnerable animal populations, especially near transboundary areas, to improve disease control through rapid diagnostics and effective vaccination strategies.
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Peste-des-petits- ruminants (PPR) is a highly contagious and devastating disease of goats and sheep. Although India is endemic for PPR, Tripura, a state in North East India has never been reported confirmed PPR outbreaks. Recently, an outbreak of PPR occurred in non-descript goats at the Sabroom town of Tripura state in North-East India in June, 2013.

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Article Synopsis
  • The serotype A foot-and-mouth disease virus (FMDV) in India poses a significant challenge due to the emergence of genetically and antigenically diverse lineages, making current vaccines less effective against some isolates.
  • In 2009, a new vaccine strain (IND40/2000) was adopted to address this diversity, but it still faces limitations, particularly against certain isolates with VP3(59)-deletion.
  • Four alternative vaccine candidates were identified and analyzed, indicating that strains IND281/2003 and IND195/2007 could be valuable additions to the vaccine strategy to ensure broader protection against evolving viral strains.
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Global epidemiological analysis is vital for implementing progressive regional foot-and-mouth disease control programmes. Here, we have generated VP1 region sequences for 55 Indian type A outbreak strains and have included complete VP1 sequences from 46 other countries to obtain a comprehensive global phylogeographical impression. A total of 26 regional genotypes within three continental topotypes, based on a 15% nucleotide divergence cut-off criterion, could be identified.

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Eight bluetongue viruses (BTV) were isolated in BHK-21 cell culture from blood of goats suffering from peste des petits ruminants. These viruses were identified as BTV serotype 1 (BTV-1) by RT-PCR using VP2-gene-based primers coupled with sequencing of the PCR products. All of the isolates showed similar genome migration profile in 8% polyacrylamide gel electrophoresis.

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A polyclonal antibody-based sandwich enzyme-linked immunosorbent assay (s-ELISA) was developed for the detection of bluetongue virus (BTV). The test used antiserum against BTV and antiserum against the bluetongue (BT) core protein. The antiserum against the virus was used as a capture antibody and the antiserum against the protein was used for detection.

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A polyclonal antibody-based sandwich ELISA (s-ELISA) was developed for the detection of bluetongue viruses (BTV) in cell culture lysates and blood samples of sheep infected experimentally. Rabbit antiserum to purified BTV particles and guineapig antiserum to core particles were used as capture antibody and detection antibody respectively. The assay has detected several of the BTV serotypes isolated in India so far.

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