Ticks are parasites that ingest blood from their hosts. During their blood meals, they can also ingest microbes, such as bacteria, from their host’s blood, which could influence the microbial community, or “microbiome”, of the tick itself. Using high-throughput sequencing, Felicia Keesing and her colleagues sampled the microbiomes of ticks that had fed on individuals of five different host species — raccoons, Virginia opossums, striped skunks, red squirrels, and gray squirrels. They found that ticks that had fed on different host species had significantly different microbiomes. This is important because some of the microbes that ticks can acquire during their blood meals are pathogens of humans, including the bacterium that causes Lyme disease.
Publication link: https://www.sciencedirect.com/science/article/abs/pii/S1877959X18303297
Full citation: Landesman, W. J., Mulder, K., Allan, B. F., Bashor, L. A., Keesing, F., LoGiudice, K., & Ostfeld, R. S. (2019). Potential effects of blood meal host on bacterial community composition in Ixodes scapularis nymphs. Ticks and tick-borne diseases.