id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-004765-7e4yu2do	Homberger, F. R.	Maternally-derived passive immunity to enterotropic mouse hepatitis virus	1992		.txt	text/plain	3091	182	60	Maternally-derived antibody to enterotropic mouse hepatitis virus (MHV) strain Y was transferred to pups by both intrauterine (IgG) and lactogenic (IgA and IgG) routes. MHV-IgG, but not IgA or IgM, could be found in the serum of pups suckling immune dams. Stomach contents of pups suckling immune dams yielded constant IgG titers and gradually declining IgA titers up to the age of 14 days, but neither isotype of MHV antibody was detected at or beyond 21 days (Table 3 ). Pups from three consecutive litters born to immune and naive dams were exsanguated at 2, 4, 6, 8, and 10 weeks of age and sera were tested for MHV-specific IgG. Antibodies persisted for 4 weeks in pups born to dams with low MHV IgG serum titers and then declined to undetectable levels.	./cache/cord-004765-7e4yu2do.txt	./txt/cord-004765-7e4yu2do.txt