Table 2.

Infectious and immunological workup

Bartonella henselae IgM/IgG	Negative
Bartonella henselae blood PCR	Negative
Blastomyces dermatitidis ID and CF	Negative
Coccidioides antibodies by CF	Negative
Chlamydia psittaci IgM/IgG	Negative
Gastrointestinal pathogen panel (stool)	Negative
Histoplasma antibodies CF (mycelia)	1:16
Histoplasma antibodies ID (yeast)	1:64
Genomic testing (Karius testing)	Positive for Aspergillus chevalieri, Bacteroides fragilis (ovatus and uniformis)
Mycoplasma pneumoniae IgM/IgG	Negative/positive
PPD test	0 mm after 48 h
QuantiFERON test	Negative
Serum IgG (mg/dL)	1,131 (normal)
Serum IgM (mg/dL)	64 (normal)
Serum IgA (mg/dL)	408 (high)
Serum IgE (kU/L)	9 (normal)
Total complement (CH50)	>60 (normal)
Neutrophil oxidative burst assay	Normal activity
Mannose-binding lectin	172 (normal)
Th17 enumeration	Normal

CF, complement fixation; ID, immunodiffusion; Ig, immunoglobulin; PPD, purified protein derivative; PCR, polymerase chain reaction.