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A population of American kestrels breeding in southeastern Pennsylvania was examined for hematozoa. Haemoproteus tinnunculi infected 17 of 23 (74%) of the adults. Parasitemia ranged from two to 252, with a median of 32 infected erythrocytes per 10,000. Parasitemia and body weight of female kestrels were negatively correlated. This parasite was not observed in the six juvenile or 38 nestling kestrels examined. Trypanosoma sp. was detected by culture in three of seven (43%) adults, but not in the six juveniles and eight nestlings examined.

The prevalence of Salmonella spp. in nestling common barn-owls was investigated in southwestern New Jersey during the summer of 1985. Of 94 owls sampled by swabbing the cloaca, eight (8.5%) were found to harbor Salmonella spp. Three serotypes--S. thompson, S. tuindorp, and S. typhimurium--were identified. Five (20%) of the 25 nest sites examined (all of them in or near farm buildings or dwellings) contained Salmonella-positive owls.

Blood smears from 259 birds of 12 species, representing four families of raptors, from New Jersey, Pennsylvania, Delaware, and Virginia were examined for blood parasites. Infected birds constituted 59.1% of the total. Birds were infected with one or more of the following genera of protozoa: Leucocytozoon (43.2%); Haemoproteus (21.6%); Plasmodium (1.2%); and Trypanosoma (1.2%). Blood culture of 142 raptors of 11 species for Trypanosoma revealed a prevalence of 41.5%. Plasmodium circumflexum is reported for the first time in Accipiter striatus, and Trypanosoma sp. in Buteo jamaicensis.