* Fourfold or greater rise in Brucella agglutination titer
between acute-and convalescent-phase serum specimens obtained [greater than or equal to] 2 weeks apart and studied at the same laboratory, or
An agglutination titer
performed on a blood specimen coll ected during ED examination was negative ([less than]1:80), but a sample obtained 11 days later had a titer of 1:320.
was 640; ELISA immunoglobulin M (IgM) antibodies and PCR results were positive.
Microscopic agglutination titer
of patients' sera collected while hospitalized and during the convalescent phase Patient serum Leptospira strain used Convalescent- Patient as antigen * Hospitalized phase 1 Serovar Grippotyphosa Moskva V <50 100 Animal isolate AM3 <50 800 Animal isolate AM1 <50 800 2 Serovar Grippotyphosa Moskva V <50 200 Animal isolate AM3 <50 200 * Samples were not reactive to a panel of representative serovars, Australis, Autumnalis, Carlos, Bataviae, Cynopteri, Hebdomadis, Copenhageni, Icterohemorrhagiae, Javanica, Pomona, Pyrogenes, Hardjo, Sejroe, Wolffi, and Tarassovi; serovars Canalzonae, Huanuco, Muelleri, and Valbuzzi belong to serogroup Grippotyphosa.
tularensis if the agglutination titer
was [greater than or equal to] 128.
A co-worker of laboratory worker 1 had an initial agglutination titer
of 1:40 (indeterminate) and 1 month later had a repeat titer of <1:20; she denied having symptoms.
interrogans (australis, autumnalis, pomona, sejroe, tarassovi, icterohaemorrhagica, hebdomadis, and patoc) were tested, and a agglutination titer
of more than 1:100 was considered positive.
were determined from the final dilution of serum showing 50% agglutination.