Acute diarrhea during army field exercise in southern China

Table 1 Pathogen detection rate

Pathogen	Number of patients	Detection rate (%)
ETEC	36	35%
Plesiomonas shigelloides	17	16.5%
Salmonella	6	5.8%
Shigella	5	4.9%
EIEC	3	2.9%
Aeromonas schubertii	2	1.9%
Aeromonas hydrophila	1	1%
Vibrio metschnikovi	1	1%
Vibrio vulnificus	1	1%

Table 2 Resistance rate of pathogens to antibiotics

Antibiotics	ETEC	Vibrio	Salmonnlla	Shigella	EIEC	Overall
	n* = 36	n = 22	n = 6	n = 5	n = 3	n = 72
Sulfamethoxazole	91.7	68.2	83.3	100.0	66.7	83.3
Trimethoprim-	91.7	59.1	83.3	80.0	66.7	79.2
Sulfamethoxazole
Oxytetracycline	69.4	77.3	100.0	100.0	100.0	75.0
Doxycycline	61.1	72.7	100.0	100.0	100.0	69.4
Furazolidone	16.7	90.9	50.5	100.0	33.3	52.0
Ampicillin	30.6	36.4	50.0	40.0	33.3	34.7
Cloromycetin	25.0	4.5	0.0	40.0	33.3	18.1
Norfloxacin	5.6	0.0	0.0	20.0	0.0	4.2
Ceftazidine	0.0	0.0	0.0	0.0	0.0	0.0

*n was the number of strains.

Table 3 Detection rate of lapactic pathogens from environ-mental specimens

Source of specimen	Number	Detection rate (%)
Flies	8	87.5
Seafood	10	80.0
Cooking utensils of vendors	15	73.3
Drinking water	15	66.7
Cooking utensils of troops	10	40.0
Camping appliances	10	20.0
Total	68	61.8

Table 4 Multiple-factor conditional logistic- regression results of case-control study

Factor	Regression coefficient	Standard error	Odds ratio	95%Confidence interval	P value
Drinking raw water	3.1460	0.4638	23.2148	9.3641-57.6862	0.0000
Eating outside	3.1365	0.6055	23.0229	7.0273-75.4280	0.0000
Contacting with patients	2.9447	0.5707	19.0055	6.2104-58.1625	0.0000
Lack of hygiene knowledge	1.7776	0.5071	5.9155	2.1893-15.9833	0.0005
Depression	11654	0.3633	3.2071	1.5735-6.5364	0.0013
Not frequently cutting fingernails	1.0504	0.3888	2.8588	1.3341-6.1258	0.0069
Lack of sleep	0.6555	0.21264	1.9261	1.2360-3.0016	0.0038

Table 5 Linear discriminant function coefficients

Factor	Lineardiscriminant	Functioncoefficient
	< 3%	3%-6%	6%
Disinfection of toilets	29.354	46.645	45.882
Garbage disposal methods	-14.564	-34.839	-25.324
Density of flies in toilets	9.127	7.143	19.911
Density of flies in garbage dumps	8.753	16.595	16.056
Density of flies near waste-water	15.855	38.361	27.858
Use of anti-fly cover	21.243	34.128	32.386
Constant	-46.378	-117.197	-133.264

Table 6 Multiple-factor conditional logistic regression results of case-case control stdy

Factors	Regression coefficient	Standard error	Odd ratio (OR)	95% confidence interval	P value
Drinking raw water		3.8610	1.1724	47.5119	4.7738-472.8718
Eating outside		2.5711	0.7506	13.0802	3.0040-56.9537
Not washing hand before eating	1.3445	0.6142	2.7487	1.1519-12.7877	0.0286