The recent advancement in genome sequencing facilities, proteomics, transcriptomics, and metabolomics of eukaryotes have opened door for employment of molecular diagnostic techniques for early detection of parasites and determining target molecules for formulating control strategies. It further leads to the introduction of several purified vaccines in the field of veterinary parasitology. Earlier, the conventional diagnostic methods was entirely based upon morphological taxonomy for diagnosis of parasites but nowadays improved molecular techniques help in phylogenetic study and open an another area of molecular taxonomy of parasites with high precision. Control measures based upon targeting endosymbionts in parasites like Dirofilaria immitis is also under exploration in veterinary parasitology. Metagenomics have added an inside story of parasites bionomics which have created havoc in human and animals population since centuries. Omics era is playing a key role in opening the new approaches on parasite biology. Various newer generations of safer vaccines like edible vaccines and subunit vaccines and diagnostic techniques based upon purified immunologically active epitopes have become commercially available against the parasites (helminths, protozoa and arthropod borne diseases). Nowadays, a transgenic and gene knock out studies using RNA interference and CRISPR are also helping in understanding the functions of genes and screening of target genes, which are not available before the advent of molecular tools. Molecular techniques had paramount impact on increasing the sensitivity of diagnostic tools, epidemiological studies and more importantly in controlling these diseases. This review is about the advancements in veterinary parasitology and their impact on the control of these pathogens.

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The present study was undertaken to work out the population structure of trichostrongylids affecting the small ruminants of Kashmir valley. The faecal samples were collected from each zone and sector of the valley and were examined by qualitative as well as quantitative techniques for presence of trichostrongyle eggs, followed by coproculture using petridish method for harvesting of infective larvae. The overall prevalence revealed Haemonchus spp. to be the most predominant trichostrongyle worm followed by Trichostrongylus spp., Oesophagostomum spp., Teladorsagia spp., Chabertia spp. and other larvae, the difference being statistically significant. In south Kashmir, a different trend was observed for trichostrongyle worms with predominance of Trichostrongylus spp., followed by Haemonchus spp., Oesophagostomum spp. and other larvae, the difference being statistically significant (P<0.05). Teladorsagia spp. and Chabertia spp. were not recorded in the south Kashmir, while as Oesophagostomum spp. and Chabertia spp. were not recorded in the north Kashmir. In small ruminants of Kashmir valley, predominance of Haemonchus spp. was observed in private sector farms than government sector farms, whereas predominance of Trichostrongylus spp. was observed in government sector farms than private sector farms, and both the difference were statistically significant. Non-significantly Teladorsagia spp. was found more in government sector farms than private sector farms. In government sector farms Oesophagostomum spp. and Chabertia spp. were recorded, while as in private sector farms Oesophagostomum spp. and Chabertia spp. were not recorded. It is concluded that trichostrongylid worms are prevalent throughout Kashmir valley in the small ruminants and appropriate control strategies need to be adopted for their control.

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