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WHOLE GENOME TARGETED ENRICHMENT AND SEQUENCING OF HUMAN-INFECTING CRYPTOSPORIDIUM spp.

Bayona Vasquez, N. J.; Sullivan, A. H.; Beaudry, M. S.; Khan, A.; de Paula Baptista, R.; Petersen, K. N.; Bhuiyan, M. I. U.; Brunelle, B.; Robinson, G.; Chalmers, R. M.; Alves-Ferreira, E. V.; Grigg, M. E.; Kissinger, J. C.; Glenn, T. C.

2024-03-30 genomics
10.1101/2024.03.29.586458 bioRxiv
Show abstract

Cryptosporidium spp. are parasites that cause severe illness in vulnerable human populations. Obtaining pure and sufficient Cryptosporidium DNA from clinical and environmental samples is a challenging task. Oocysts shed in available fecal samples can be limited in quantity, require purification (biased towards dominant strains), and yield limited DNA (<40 fg/oocyst). Here, we use updated genomic sequences from a broad diversity of human-infecting Cryptosporidium species (C. cuniculus, C. hominis, C. meleagridis, C. parvum, C. tyzzeri, and C. viatorum) to develop and validate a set of 100,000 RNA baits (CryptoCap_100k) with the aim of enriching Cryptosporidium spp. DNA from varied samples. Compared to unenriched libraries, CryptoCap_100k increases the percentage of reads mapping to target genome sequences, increases the depth and breadth of genome coverage and the reliability of detecting species and mixed infections within a sample, and allows assessment of genetic variation via SNP calling, while decreasing costs.

Published in Nature Communications (predicted rank #1) · training set

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