. 2025 Feb 16;18:55. doi: 10.1186/s13071-025-06668-4

Table 1.

Deltamethrin median lethal dose (LD₅₀) values and resistance ratios (RRs) for Musca domestica collected from three slaughterhouses in Saudi Arabia

Population	No.^a	LD₅₀ (ng/fly)	95% fiducial limits		Slope ± SE	χ²	P	RR
Population	No.^a	LD₅₀ (ng/fly)	Lower	Upper	Slope ± SE	χ²	P	RR
LAB	360	2.87^d	2.43	3.44	2.35 ± 0.24	6.77	0.08	–
Jeddah	360	1793^a	1346	2358	1.29 ± 0.19	2.29	0.52	625
Taif	360	734^b	607	878	2.16 ± 0.21	5.09	0.17	256
Riyadh	360	307	220	408	1.17 ± 0.14	1.80	0.77	107

LD₅₀ values with different superscript letters are significantly different (no overlapping 95% fiducial limits)

^aNumber of individual flies

SE standard error