Table 2.

Independent comparative histologic evaluation of all cases

No.	Group	Species	PPH	Infection	Tissue type	Tissue Layers Present					Inflammation score (0–3)	Inflammation type
						M	D	TS	SV	CM
1	C	R	No	No	U + P	X	X	X	X	X	0	n/a
2	C	R	No	No	P		X	X	X	X	0	n/a
3	C	H	No	No	P		X	X	X	X	0	n/a
4	RP	R	No	Yes	U + P	X	X	X	X	X	2a	Neutrophilic
5	RP	R	No	Yes	U + P	X	X	X	Necrosis		3a	Neutrophilic
6	RP	R	Yes	Nob	U + P	X	X	X	X	X	1a	Neutrophilic
7	RP	H	Yes	No	P		X	X	X	X	0	n/a
8	RP	H	Yes	No	P		X	X	X	X	0	n/a
9	RP	H	No	No	P				X	X	0	n/a
10	RP	H	No	No	P		X	X	X	X	0	n/a
11	RP	H	Yes	No	P		X	X	X	X	0	n/a
12	RP	H	No	No	P		X		X	X	0	n/a
13	RP	H	Yes	No	P		X		X	X	0	n/a
14	RP	H	No	No	P		X	X	X		0	n/a
15	RP	H	No	No	P		X	X	X		0	n/a
16	RP	H	Yes	No	P		X	X	X	X	0	n/a
17	RP	H	Yes	Yes	P		X	X	X	X	0	n/a

C, control; CM, chorionic membrane; D, decidua; H, human; M, myometrium P, placenta; R, rhesus; RP, retained placenta; SV, syncytial villi; TS, trophoblastic shell; U, uterus. Infection information was provided from clinical documentation either from a routine pathology report for human cases or a necropsy report for NHPs.

^a Cases with 2 samples each, highest inflammation score reported in above table: case 4 details (score of 2 for sample with M + D; score of 0 for sample with D+TS+SV+CM), case 5 details: (score of 3 for sample with M + D; score of 2 for sample with D+TS), case 6 details: (score of 0 and 1 for first and second samples, both samples with all layers present).

^b Case without clinical documentation of infection but inflammation seen on H&E.