. 2015 Aug;21(8):1429–1432. doi: 10.3201/eid2108.140343

Table. Serologic, immunohistopathologic, and molecular test results for patients with infective endocarditis caused by Bartonella spp. or Coxiella burnetii, Brazil*.

Patient no., by infection type	Serum IgG ≥800 by IFA†	Immunohistochemical analysis of cardiac valve vegetation		Microorganism by histologic analysis	PCR‡	Species of Bartonella
Patient no., by infection type	Serum IgG ≥800 by IFA†	Bartonella spp.	C. burnetii	Microorganism by histologic analysis	PCR‡	Species of Bartonella
Bartonella spp.
1	+	+	Neg	Gram-negative coccobacilli	+	B. quintana
2	+	+	Neg	Gram-negative coccobacilli	+	B. henselae
3	+	+	Neg	None	+	B. henselae
4	+	NA	NA	NA	Neg	NA
5	+	+	Neg	Gram-negative coccobacilli	+	NA
6	+	+	Neg	Gram-negative coccobacilli	+	B. quintana
7	+	NA	NA	NA	+	B. henselae
8	+	NA	NA	NA	+	NA
9	+	NA	NA	NA	Neg	NA
10	+	+	Neg	Gram-negative cocci	+	B. henselae

C. burnetii	Serum anti–phase I IgG ≥800 by IFA§	Immunohistochemical analysis of cardiac valve vegetation		Microorganism by histologic analysis	PCR‡	Q fever endocarditis (6)
C. burnetii	Serum anti–phase I IgG ≥800 by IFA§	Bartonella spp.	C. burnetii	Microorganism by histologic analysis	PCR‡	Q fever endocarditis (6)
11	+	Neg	+	Small gram-negative coccobacilli	+	Definite 2A criteria
12	+	Neg	+	None	+	Definite 2A criteria
13	+	Neg	+	None	+	Definite 2A criteria
14	+	NA	NA	NA	+	Definite 2B criteria¶

*IFA, immunofluorescence assay; +, positive; Neg, negative; NA, material not available for analysis. ¶Serologic result >6,400 and vegetation on ecocardiography. †B. henselae or B. quintana. ‡Serum or tissue sample. §C. burnetii.