▁nit rate ▁but ▁not ▁nit rite . ▁F resh ▁meat ▁contains ▁ 0 . 4 – 0 . 5   m g / kg ▁nit rite ▁and ▁ 4 – 7   m g / kg ▁of ▁nit rate ▁( 1 0 – 3 0   m g / kg ▁nit rate ▁in ▁c ured ▁me ats ). ▁ ▁The ▁presence ▁of ▁nit rite ▁in ▁animal ▁t issue ▁is ▁a ▁consequence ▁of ▁met abol ism ▁of ▁nit ric ▁ox ide , ▁an ▁important ▁ne uro trans mit ter . ▁N it ric ▁ox ide ▁can ▁be ▁created ▁de ▁nov o ▁from ▁nit ric ▁ox ide ▁synth ase ▁util izing ▁arg in ine ▁or ▁from ▁ing ested ▁nit rate ▁or ▁nit rite . ▁ ▁Hum ane ▁to x in ▁for ▁fer al ▁h og / w ild ▁bo ar ▁control ▁ ▁Because ▁of ▁sod ium ▁nit rite ' s ▁high ▁level ▁of ▁to x icity ▁to ▁sw ine ▁( S us ▁sc ro fa ) ▁it ▁is ▁now ▁being ▁developed ▁in ▁Australia ▁to ▁control ▁fer al ▁p igs ▁and ▁wild ▁bo ar . ▁The ▁sod ium ▁nit rite ▁indu ces ▁m eth em og lo bin emia ▁in ▁sw ine , ▁i . e . ▁it ▁reduces ▁the ▁amount ▁of ▁o xygen ▁that ▁is ▁released ▁from ▁hem og lo bin , ▁so ▁the ▁animal ▁will ▁feel ▁faint ▁and ▁pass ▁out , ▁and ▁then ▁die ▁in ▁a ▁hum ane ▁manner ▁after ▁first ▁being ▁rendered ▁un cons cious . ▁The ▁Texas ▁Park s ▁and ▁Wild life