Salmonella Mesenteric Lymphadenitis Causing Septic Peritonitis in Two Dogs

Figures & data

Figure 1 Abdominal radiographs with left, right, and ventrodorsal views depicting decreased serosal detail in the mid-abdomen. No mass effect was visualized.

Figure 2 Ultrasound images of enlarged hypoechoic jejunal lymph nodes (A and B) and hypoechoic pancreas, suggesting pancreatitis (C).

Table 1 Case #1 Salmonella Species Susceptibility Results

Antibiotic	MIC	Interpretation
Amikacin	8	R
Amoxicillin/Clavulanate	1/0.5	R
Ampicillin	1	R
Cefazolin	2	R
Cefovecin	1	S
Cefpodoxime	≤1	S
Ceftazidime	≤4	S
Cephalexin	4	R
Chloramphenicol	8	S
Doxycycline	2	S
Enrofloxacin	≤0.12	S
Gentamicin	0.5	R
Marbofloxacin	≤0.12	S
Orbifloxacin	≤1	S
Piperacillin/Tazobactam	≤8/4	S
Pradofloxacin	>2	R
Trimethoprim/Sulfamethoxazole	≤0.5/9.5	S
Tetracycline	≤4	S

Note: Susceptibility results of tissue culture revealed multi-drug resistant Salmonella species.

Abbreviations: MIC, minimum inhibitory concentration; R, resistant; S, susceptible.

Table 2 Case #2 Salmonella Species Susceptibility Results

Antibiotic	MIC	Interpretation
Amikacin	≤4	R
Amoxicillin/Clavulanate	1/0.5	R
Ampicillin	1	R
Cefazolin	2	R
Cefovecin	1	S
Cefoxitin	≤2	R
Cefpodoxime	≤2	S
Ceftiofur	0.5	S
Cephalothin	≤2	R
Chloramphenicol	8	S
Doxycycline	≤2	S
Enrofloxacin	≤0.25	S
Gentamicin	≤1	R
Marbofloxacin	≤0.25	S
Trimethoprim/Sulfamethoxazole	≤0.5/9.5	S

Note: Susceptibility results of abdominal fluid revealed multi-drug resistant Salmonella species.

Abbreviations: MIC, minimum inhibitory concentration; R, resistant; S, susceptible.