( ( ( As ( Opperdoes ( explains it ) ) ) ( , ( ( the parasite ) ( first ( ( enters ( its ( human host ) ) ) ( through ( ( the ( infective bite ) ) ( of ( the ( tse-tse fly ) ) ) ) ) ) ) ) ) ) ( , ( ( ( then ( dwells ( in ( ( ( the bloodstream ) and ) ( the body ) ) ) ) ) ( fluids ( that ( are ( rich ( in ( ( glucose , ) ( ( the ( major nutrient ) ) ( for ( both ( ( ( our ( body cells ) ) and ) ( the trypanosome ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (SINV (S (SBAR (IN As) (S (NP (NNP Opperdoes)) (VP (VBZ explains) (NP (PRP it))))) (, ,) (NP (DT the) (NN parasite)) (ADVP (RB first)) (VP (VBZ enters) (NP (PRP$ its) (JJ human) (NN host)) (PP (IN through) (NP (NP (DT the) (JJ infective) (NN bite)) (PP (IN of) (NP (DT the) (JJ tse-tse) (NN fly))))))) (, ,) (VP (ADVP (RB then)) (VBZ dwells) (PP (IN in) (NP (NP (DT the) (NN bloodstream)) (CC and) (NP (DT the) (NN body))))) (NP (NNS fluids) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADJP (JJ rich) (PP (IN in) (NP (NP (NN glucose)) (, ,) (NP (NP (DT the) (JJ major) (NN nutrient)) (PP (IN for) (NP (PDT both) (NP (PRP$ our) (NN body) (NNS cells)) (CC and) (NP (DT the) (NN trypanosome)))))))))))) (. .)))
As Opperdoes explains it, the parasite first enters its human host through the infective bite of the tse-tse fly, then dwells in the bloodstream and the body fluids that are rich in glucose, the major nutrient for both our body cells and the  trypanosome.
(ROOT (S (NP (NP (NNS Monosaccharides)) (, ,) (ADJP (RB particularly) (JJ glucose)) (, ,)) (VP (VBP are) (NP (NP (JJ major) (NNS nutrients)) (PP (IN for) (NP (NNS cells))))) (. .)))