Table 1.

Total numbers of labeled neurons counted bilaterally within infected areas of the medulla, pons, and cerebellum

Brain Area	Early Group			Intermediate Group			Late Group
	C53	C52	C21	C38	C39	C51	C36	C37
Dorsal respiratory group	9	154	294	371	747	488	✓	✓
Medial nucleus of the solitary tract	0	1	20	41	88	26	✓	✓
Caudal ventral respiratory group	1	25	85	101	181	81	✓	✓
Rostral ventral respiratory group	8	218	516	478	604	504	✓	✓
Pre-Bötzinger complex	0	79	204	279	279	280	✓	✓
Bötzinger complex	1	89	104	148	305	149	✓	✓
Kölliker-Fuse nucleus	0	55	149	183	302	177	✓	✓
Medial parabrachial nucleus	0	9	50	143	159	92	✓	✓
Lateral parabrachial nucleus	0	12	1	29	29	22	✓	✓
Medial reticular formation	0	47	121	538	1,570	1,491	✓	✓
Medullary lateral reticular field	0	84	297	554	1,405	919	✓	✓
Pontine lateral reticular field	0	22	39	133	650	340	✓	✓
Ventral paratrigeminal region	0	26	38	48	99	68	✓	✓
Spinal trigeminal nucleus	0	0	0	11	63	37	✓	✓
Principal trigeminal nucleus	0	0	0	0	9	20	✓	✓
Medial vestibular nucleus	0	0	0	10	35	21	✓	✓
Inferior vestibular nucleus	0	1	2	40	74	51	✓	✓
Lateral vestibular nucleus	0	7	2	31	133	257	✓	✓
Superior vestibular nucleus	0	0	0	25	11	9	✓	✓
Fastigial nucleus	0	0	1	6	41	30	✓	✓
Dentate nucleus	0	0	1	1	9	24	✓	✓
Nucleus interpositus	0	0	0	0	0	0	✓	✓
Purkinje cell layer	0	0	0	0	0	0	✓	✓
Retrotrapezoid nucleus	0	0	1	16	29	16	✓	✓
Raphe pallidus	0	2	1	15	43	16	✓	✓
Raphe obscurus	0	3	4	4	31	20	✓	✓
Lateral reticular nucleus	0	1	9	2	13	20	✓	✓
Cuneate nucleus	0	0	3	2	13	20	✓	✓
Gracile nucleus	0	0	0	0	0	2	✓	✓
Dorsal cochlear nucleus	0	0	0	0	1	0	✓	✓
Anteroventral cochlear nucleus	0	0	0	0	0	1	✓	✓
Posteroventral cochlear nucleus	0	0	0	0	0	0	✓	✓
Nucleus of the trapezoid body	0	0	0	0	10	13	✓	✓

Check marks (✓) indicate the presence of infection as determined by qualitative analysis.