Table 2. Patients with no history of previous brucellosis who had positive IgM and negative IgG.

Patient	Age	Gender	Risk factors	Symptoms	Number of samples IgM + and IgG -	Rose Bengal test	Other diagnostic tests	Antimicrobial treatment	Final diagnosis
6	35	M	no	Fever and arthralgia	1	Negative	----------	no	Probable acute parvovirus infection
7	28	M	no	Oligoarthritis	7	Negative	PCR (negative)	Dx (6 weeks) + Stp (15 days)	Chronic oligoarthritis
8	50	V	no	Fever	1	Negative	-----------	Dx 100 mg/12 h (8 days)	Q fever
9	67	M	no	Pancytopenia and splenomegaly	1	Negative	-----------	No	lymphoproliferative disorder
10	46	M	no	Neck pain	1	Negative	-----------	No	Mechanical neck pain
11	61	M	no	Stroke (TIA). Right metatarsotarsiana Arthritis	1	Negative	----------	No	Stroke. Acute arthritis resolved.
12	74	V	no	Fever and low blood pressure	1	Negative	----------	No	Septic shock of unknown origin
13	29	M	She worked in cheese factory	Polyarthralgias	1	Negative	----------	Dx + Rf (3 months) + gentamicin (2 weeks)	Polyarthalgias
14	39	V	shepherd	Abdominal pain and fever	2	Negative	----------	Levofloxacin (8 days)	Self-limited unspecific abdominal pain.
15	50	V	No	Fever	1	Negative	Blood cultures (negatives)	Dx+ Rf (45 days)	Q fever
16	48	M	no	Fever	1	Negative	-----------	no	Self-limited febrile syndrome
17	58	V	no	Low back pain	1	Negative	PCR (negative), Blood cultures (negatives)	Dx (6 weeks) + gentamicin (14 days)	Prostate malignancy

Abbreviations: F: female; M: male; PCR: polymerase chain reaction; Dx: doxycycline; Stp: streptomycin; Rf: rifampin.