We present mid-infrared Infrared Space Observatory Short-Wavelength Spectrometer (ISO-SWS) observations of the fine-structure emissions lines [Ne II] 12.8{mu}m, [Ne III] 15.6{mu}m, [Ne III] 36.0{mu}m, [Ar II] 6.99{mu}m, [Ar III] 8.99{mu}m, [S III] 18.7{mu}m, [S III] 33.5{mu}m, and [S IV] 10.5{mu}m and the recombination lines Br{alpha} and Br{beta} n a sample of 112 Galactic H II regions and 37 nearby extra-Galactic H II regions in the LMC, SMC, and M33.
