In what ways might anna's infection have played into her untimely death

Aside from Anna’s sickle cell disease and type 1 diabetes, she also has urinary tract infection because of weaken immune system. Her infection was cause by Serratia marcescens that led to a severe infection or septic shock, which then impaired the function of certain cells or cause multiple organ failures and the untimely death of Anna.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.