Research Article

Virulence Factors Associated with Pediatric Shigellosis in Brazilian Amazon

Table 2

Comparison of diarrhea symptoms among etiologic agents.

Symptoms
Bacteria monoinfection Parasite and bacterial CoinfectionRV and bacterial coinfection RV monoinfection Unknown etiology No bacteria as etiologic agent E. coli Salmonella Shigella Yersínia

Fever
 Pos.646 (74.5)31 (68.9)127 (75.6)34 (87.2)148 (74.4)0.185189 (76.8)615 (73.5)144 (75)25 (83.3)28 (82.4)0.588
 Neg.218 (25.1)14 (31.1)40 (23.8)4 (10.3)51 (25.6)56 (22.8)220 (26.3)46 (24)5 (16.7)6 (17.6)
 NI#3 (0.3)0 (0)1 (0.6)1 (2.6)0 (0)1 (0.4)2 (0.2)2 (1)0 (0)0 (0)
Vomiting
 Pos.633 (73)31 (68.9)143 (85.1)33 (84.6)148 (74.4)0.006186 (75.6)640 (76.5)136 (70.8)16 (53.3)26 (76.5)0.036
 Neg.231 (26.6)14 (31.1)24 (14.3)5 (12.8)51 (25.6)59 (24)195 (23.3)55 (28.6)13 (43.3)8 (23.5)
 NI3 (0.3)0 (0)1 (0.6)1 (2.6)0 (0)1 (0.4)2 (0.2)1 (0.5)1 (3.3)0 (0)
Dehydration
 Pos.590 (68.1)26 (57.8)104 (61.9)28 (71.8)137 (68.8)0.07167 (67.9)559 (66.8)130 (67.7)20 (66.7)21 (61.8)0.832
 Neg.239 (27.6)19 (42.2)54 (32.1)9 (23.1)60 (30.2)72 (29.3)238 (28.4)55 (28.6)10 (33.3)12 (35.3)
 NI38 (4.4)0 (0)10 (6)2 (5.1)2 (1)7 (2.8)40 (4.8)7 (3.6)0 (0)1 (2.9)
Blood in stool
 Pos.134 (15.5)3 (6.7)20 (11.9)3 (7.7)38 (19.1)0.31246 (18.7)118 (14.1)24 (12.5)10 (33.3)5 (14.7)0.074
 Neg.718 (82.8)41 (91.1)145 (86.3)36 (92.3)159 (79.9)198 (80.5)704 (84.1)165 (85.9)19 (63.3)29 (85.3)
 NI15 (1.7)1 (2.2)3 (1.8)0 (0)2 (1)2 (0.8)15 (1.8)3 (1.6)1 (3.3)0 (0)
Fecal occult blood
 Pos.227 (26.2)13 (28.9)25 (14.9)5 (12.8)53 (26.6)0.00961 (24.8)208 (24.9)34 (17.7)18 (60)8 (23.5)<0.001
 Neg.640 (73.8)32 (71.1)143 (85.1)34 (87.2)146 (73.4)185 (75.2)629 (75.1)158 (82.3)12 (40)26 (76.5)

Frequencies were calculated by the Chi-square test.
#NI: not informed.