Chirwere cheChagas, chinozivikanwawo seAmerican trypanosomiasis, chirwere cheparasitiki chinopisa chinokonzerwa neprotist Trypanosoma cruzi. Inopararira kunyanya nezvipembenene zvinozivikanwa seTriatominae, kana kuti "kissing bugs". Zviratidzo zvinogara zvichichinja mukufamba kwehutachiona. Muchikamu chekutanga, zviratidzo hazviwanzo kuvepo kana zvinyoro, uye zvinogona kusanganisira fivha, kuzvimba kwemamymph node, kutemwa nemusoro, kana kuzvimba kwenzvimbo yekuruma. Mushure memavhiki masere negumi nemaviri, vanhu vanopinda muchikamu chisingaperi chechirwere uye mu60-70% hazvichatomboburitsa zvimwe zviratidzo. Mamwe 30-40% yevanhu vanokudziridza zvimwe zviratidzo makore gumi nemakumi matatu mushure mekutanga kwehutachiona, kusanganisira kuwedzera kwemakumbo emwoyo muna 20-30%, kusvika pakukundikana kwemoyo. Kuwedzerwa kwechirwere kunogona kuitikawo muBrazil nehutachiona inozivikanwa seTriatominae, kana kuti "kissing bugs".
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