Table 1.

Minimum anti-A antibodies titers presented by type B cats and percentage of type A cats presenting anti-B antibodies. In all studies, all type B cats presented anti-A antibodies titers. Anti-B antibodies in type A animals ranged from 1 : 2 to 1 : 16 in most cases.

COUNTRY	Minimum titers of anti-A antibodies presented by type B cats	% of type A cats presenting anti-B antibodies
USA [25]	1 : 64	36
Australia [13]	1 : 8	35
Turkey
Pedigree [17]	<1 : 4	60.6
Nonpedigree [19]	<1 : 4	70
Portugal [18]	1 : 16	12.5
Spain (Gran Canary) [16]	1 : 16	24.4
United Kingdom [15]	1 : 4	44.3