Spatial distribution of Anopheles gambiae sensu lato larvae in the urban environment of Yaoundé, Cameroon

Table 3 Comparison of physico–chemical characteristics between sites with and without anopheline larvae

Parameter	With anopheline larvae		Without anopheline larvae		t-test	P-value
Parameter	N	Means ± SE	N	Means ± SE	t-test	P-value
pH	227	8.0 ± 0.1	286	7.8 ± 0.1	1.6	0.2
TDS (mg/L)	240	96.2 ± 16.8	300	93.9 ± 9.6	0.6	0.4
Conductivity (μs/cm)	240	449.0 ± 29.8	300	382.9 ± 14.6	3.9	0.05
Turbidity (FTU)	240	380.9 ± 103.8	300	146.0 ± 18.7	10.5	0.001
Calcium (mg/L)	240	53.7 ± 21.7	300	129.7 ± 85.6	2	0.16
Iron LR	108	0.7 ± 0.1	118	0.7 ± 0.1	0	0.98
Organophosphates (mg/L)	138	13.3 ± 4.2	158	9.0 ± 0.8	3.5	0.06
Aluminium (mg/L)	240	0.3 ± 0.1	300	0.2 ± 0.1	0.2	0.7
Sulfate	240	42.2 ± 3.9	300	36.8 ± 3.3	0.9	0.3
H₂O₂ (mg/L)	240	3.8 ± 1.0	300	1.1 ± 0.2	27.4	0.002
Temperature (°C)	240	28.2 ± 0.2	300	27.4 ± 0.2	1.5	0.001

N Number, SE Standard error, FTU Formazine turbidity unit, TDS Total disolved solids, LR Light rigid

ISSN: 2049-9957