Prevalence of Toxocara spp. eggs in soil of public areas in Iran: A systematic review and meta-analysis

Peer review under responsibility of Alexandria University Faculty of Medicine.

Available online 29 July 2017

Figures & data

Fig. 1 PRISMA flow diagram.

Fig. 2 Funnel plot to detect publication bias.

Fig. 3 Forest plot diagram of the present systematic review and meta-analysis.

Table 1 Baseline characteristics of included studies.

No.	Province	Year of publication	Sample size (n)	Positive n (%)	Method	Ref
1.	Fars	2006	112	7 (6.3)	Flotation (Zinc sulfate)	48
2.	West Azarbaijan	2008	102	8 (7.8)	Flotation (Saturated salt)	49
3.	Lorestan	2010	285	63 (22.2)	Flotation (Saturated sucrose)	50
4.	East Azarbaijan	2012	300	28 (9.3)	Flotation (Saturated salt)	51
5.	Tehran	2012	150	58 (38.7)	Flotation (Sodium nitrate)	52
6.	Qazvin	2012	95	3 (3.15)	Flotation (Saturated sucrose)	53
7.	West Azarbaijan	2014	150	12 (8)	Flotation (Zinc sulfate)	54
8.	Khuzestan	2014	291	85 (29.2)	Flotation (Saturated sucrose)	55
9.	Khuzestan	2014	210	71 (33.8)	PCR	10
10.	Khorasan Razavi	2015	340	30 (8.82)	Flotation (Saturated sucrose)	56
11.	Isfahan	2015	140	40 (28.6)	Flotation (Saturated sucrose)	57
12.	Kermanshah	2016	126	17 (13.5)	Flotation (Sodium nitrate)	58
13.	Mazandaran	2016	580	21 (3.73)	Flotation (Saturated sucrose)	59
14.	Kermanshah	2016	150	27 (18)	Flotation (Sodium nitrate)	60

Table 2 Result of metaregression, the affect of sample size and year on prevalence of Toxocara spp.

p	Coef.	Err.	t	P>t	[95% Conf. Interval]
Year	0.0099	0.0119	0.84	0.42	−0.016	0.036
Sample	−0.0002	0.0003	−0.78	0.45	−0.001	0.0004
_cons	−19.8988	23.941	−0.83	0.424	−72.591	32.79