ins , ▁variable ▁surface ▁ant ig ens , ▁and ▁s ial id ases ▁found ▁in ▁M . ▁all ig ator is . ▁S ial id ase , ▁in ▁combination ▁with ▁h yal ur on id ase , ▁is ▁thought ▁to ▁act ▁as ▁a ▁vir ul ence ▁factor ▁responsible ▁for ▁the ▁path ogen icity ▁of ▁the ▁organ ism , ▁working ▁together ▁as ▁potential ▁prom ot ers ▁of ▁the ▁expression ▁of ▁CD 9 5 ▁( F as R ). ▁CD 9 5 ▁is ▁a ▁protein ▁involved ▁in ▁medi ated ▁cell ▁death ▁of ▁e uk ary otic ▁cells . ▁In ▁a ▁study ▁done ▁in ▁ 2 0 0 5 , ▁research ers ▁used ▁imm un of lu ores c ence ▁imag ing ▁to ▁observe ▁the ▁outcome ▁of ▁M . ▁all ig ator is ▁in ▁vit ro ▁on ▁apo pt osis ▁by ▁card iac ▁fib ro bl asts ▁of ▁all ig ators . ▁Results ▁of ▁the ▁study ▁showed ▁that ▁M . ▁all ig ator is ▁produces ▁an ▁in fection ▁that ▁changes ▁the ▁morph ology ▁in ▁card iac ▁fib ro bl asts , ▁increasing ▁CD 9 5 ▁expression ▁leading ▁to ▁cell ▁death . ▁ ▁E colog ical ▁impact ▁▁ ▁Ex perimental ▁in oc ulation ▁of ▁American ▁all ig ators ▁( All ig ator ▁miss iss ipp ien is ), ▁S iam ese ▁cro cod iles ▁( C ro cd yl us ▁si am ensis ), ▁and ▁broad - n osed ▁ca im ans ▁( Ca iman ▁l ati ro str is ) ▁with ▁M . ▁all ig ator