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it break might <br />lese during <br />Lism will <br />ill be coming <br />I of botulism, <br />lich could be <br />♦ <br /># \ <br />%: <br />1 <br />. »I <br />’.r 'O <br />; r‘ ■ <br />’i <br />..jger Johnson Regional Wildlife Manager <br />Region VI <br />DATE: October 4. 1976 <br />. 7 <br />i V <br />' I FROM Philip P. EconoiRon <br />Fish and Wildlife Pathologist <br />Ecological Services Section 6t.£■ <br />SUBJECT: <br />m <br />Pathology Report/Hallards/Srass Lake and Lake Harvey—S.U. Minneapolis <br />The examination of^ , t above locations ruled out duck viral enteritis, fowl cholera. <br />, Nsalmonellosis. toxic algae, and lead poisoning. <br />11 t. <br />* ■ <br />i •If. J <br />•’ '* ■■ V <br />1 <br />{ <br />11 <br />. V -. r <br />1 • % . • <br />2Ll!r: «:’S «.’2S3R3,?S.S’S^Ssr <br />Kith the onset of cooler weather and reduc^ oxygen demand, the temperature and anaerobic conditions <br />Sileh have promoted the growth of Type C. cZoatwitum totuHnam. <br />ttls summer will end. The toxin that had been formed also <br />degrades more rapidly under these circumstances. <br />Natural and Induced restoration of water levels at these <br />offected lakes and ponds will do much to prevent similar <br />g^(ijpi*ances of avian botulism in the future. <br />. »PPEtlls <br />■■if A. <br />4< <br />•** f* <br />R. Holmes <br />R. Jessen <br />R. Benson <br />0. Jarvenpa <br />? <br />•’h ->• •.> I <br />•• <br />V- <br />•.» • <br />*■ <br />A . <br />• ’% <br />;w,-t <br />•« ♦ <br />* *9 1 m I: 1 mrnl <br />• ‘ •• <br />s 1 <br />t <br />•i