Among the 8 cats with FIP, 19 FECV-asymptomatic cand, and 1 cheetah with FIP, 6 composite genotypes were identified based on these 5 diagnostic sites (Appendix Table 2).
Fielding independent pitching (FIP): 2.08 (third; leader — Aroldis Chapman, 1.69).
His 4.10 FIP, 4.10 xFIP, 4.29 SIERA, 8.5percentt swinging strike rate and 9.8percentt walk rate are all career-worst marks by far.
In his next nine starts he has gone 5-3 with a 5.56 ERA (4.78 FIP, 3.71 SIERA,.346 BABIP, 37% hard-hit rate).
No, we can't forget that he was lights out early on when he won his first nine starts with a 1.58 ERA (2.88 FIP, 3.49 SIERA,.197 BABIP, 23% hard-hit rate).
Matrix metalloprotease 9 is of particular interest because it was demonstrated to be upregulated in activated monocytes and macrophages during FIP (31 ).
A contrasting view to the internal mutation hypothesis to explain the genesis of FIP outbreaks is that there is a circulating FCOV other than FECV that is specific for FIP (22 ).
Evidence suggests that the host immune system is crucial in this pathogenesis; profound T-cell depletion from the periphery and lymphatic tissues and changes in cytokine expression are observed in end-stage FIP (9, 10 ).
FRCoVs might evolve through mutation or deletion into viruses that cause systemic disease, or alternatively, different FRCoVs are circulating, analogous to the hypotheses put forward to explain the occurrence of FIP (9, 10 ).
Notably, when the S1/S2 sequences were analyzed at the second sampling, only the cat with FIP (234) had a change in the FECV consensus sequence (a P2 R-L mutation).
