Fig.1. (TiO 2 ) ( ) CASO ES. Fig.2. 1) Toilet floor. 2) Handrail beside toilet seat.

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せ ᪨ ᙜ♫ࡣࠊ㧗㏿ࣇ࣮࣒ࣞ⁐ᑕἲ࡟ࡼࡗ࡚ගゐ፹(TiO2)ࡢᡂ⭷ᢏ⾡ࢆ☜❧ࡋ࡚௨᮶ࠊග ゐ፹ᢠ⳦ࢱ࢖ࣝࡸ✵Ẽί໬⿦⨨࡞࡝ᵝࠎ࡞ගゐ፹ᶵ⬟ࢆ௜୚ࡋࡓ〇ရࢆ㛤Ⓨࡋ࡚ࡁࡓࠋ ቨᮦࡸᗋᮦ࡟⁐ᑕࡉࢀࡓගゐ፹ࢥ࣮ࢸ࢕ࣥࢢࡣẅ⳦ຠᯝࢆ♧ࡍࡇ࡜ࡀ▱ࡽࢀ࡚࠾ࡾࠊ ච␿ຊࡢపୗࡋࡓᝈ⪅ࡸ฼⏝⪅ࡀከ࠸་⒪௓ㆤ㛵㐃᪋タ➼࡛ࡢගゐ፹〇ရࡢά⏝ࡀᮇ ᚅࡉࢀ࡚࠸ࡿࠋࡑࡇ࡛ᮏሗ࡛ࡣࠊ௓ㆤ᪋タ࡟࠾ࡅࡿ⣽⳦㢮࡟ࡼࡿởᰁᗘࡢᐇែᢕᥱ࡜ࠊ ᐇ⎔ቃ࡟࠾ࡅࡿගゐ፹ᢠ⳦ࢱ࢖ࣝ࡟ࡼࡿ㝖⳦ຠᯝࡢ᳨ドࢆ┠ⓗ࡟ࠊ✀ࠎࡢ⎔ቃ⾲㠃࡟ ࠾ࡅࡿ௜╔⳦ᩘࡢ ᐃࢆ⾜ࡗࡓࠋ⤖ᯝࠊ௓ㆤ᪋タࢺ࢖ࣞᗋ㠃ࡢởᰁᗘࡀࠊᑐ㇟⩌ࡢ୰ ࡛᭱ࡶ㧗࠸ࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋࡉࡽ࡟ࠊ௓ㆤ᪋タࡢࢺ࢖ࣞᗋ㠃࠾ࡼࡧᏛᰯࡢಖ೺ᐊᗋ 㠃࡟࠾࠸࡚ࡶࠊගゐ፹ᢠ⳦ࢱ࢖ࣝࡢ᪋ᕤ๓ᚋࡢ௜╔⳦ᩘኚ໬࡟ᇶ࡙ࡃ⎔ቃホ౯ࢆ⾜࠺ ࡇ࡜࡛ගゐ፹ᢠ⳦ࢱ࢖ࣝ࡟ࡼࡿ㝖⳦ຠᯝࢆ☜ㄆ࡛ࡁࡓࠋ Synopsis:

FUJICO has developed various photocatalystic(TiO2) products since we had established the

deposition technology of photocatalyst by a high-speed flame spraying method. It was well known that the photocatalystic materials sprayed on wall and floor show a sterilization effect. Therefore, the use of photocatalytic products are expected to be used in medical facilities and nursing home for the many elderly patients and users having low immunity. In this study, we measured the number of the adhesion bacteria in the environmental surface for the purposes of understanding of the actual condition of bacterial contamination in nursing home for the elderly and demonstration of bacteria elimination by the photocatalytic products.As a result, we have confirmed that the pollution degree of toilet floor was identified as the largest. We have also confirmed the sanitization effect with the photocatalytic antibacterial tile in the toilet floor for nursing home and in the floor for school infirmary.

௓ㆤ᪋タ࡟࠾ࡅࡿởᰁᗘࡢᐇែᢕᥱ࡜ගゐ፹ᘓᮦ࡟ࡼࡿ㝖⳦ຠᯝࡢᐇド

Understanding of Actual Condition of Bacterial Contamination in Nursing Home for Elderly

and Demonstration of Bacteria Elimination by Photocatalyst Product

ᢏ⾡㛤Ⓨࢭࣥࢱ࣮ ஦ᴗ໬㛤Ⓨᐊ ಀ㛗 ᒣᮏΎྖ .L\RVKL<DPDPRWR ᢏ⾡㛤Ⓨࢭࣥࢱ࣮ ஦ᴗ໬㛤Ⓨᐊ ⇦ᒣ࡞ࡘࡳ 1DWVXPL<DNL\DPD ᢏ⾡㛤Ⓨࢭࣥࢱ࣮ ஦ᴗ໬㛤Ⓨᐊ ᐊ㛗 ᵽཱྀ཭ᙪ 7RPRKLNR+LJXFKL ᢏ⾡㛤Ⓨࢭࣥࢱ࣮ ஦ᴗ໬㛤Ⓨᐊ ಀ㛗༤ኈ㸦ᕤᏛ㸧。㖟ᴿ (XQ\RXQJ%DH ᢏ⾡㛤Ⓨࢭࣥࢱ࣮ ஦ᴗ໬㛤Ⓨᐊ 㧗␊ఞኸ㔛 .DRUL7DNDEDWDNH

ᢏ ⾡ ㄽ ᩥ

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✜⸒ ⃻࿷ޔක≮੺⼔㑐ㅪᣉ⸳ߢߪޔ∛ේ૕ߩ᳓ᐔવ៝ࠍ ᛥ೙ߔࠆߚ߼ߦ᭽ޘߥᗵᨴኻ╷߇ታ〣ߐࠇߡ޿ࠆޕ․ ߦ⿥㜞㦂ൻ␠ળࠍㄫ߃ޔක≮߇㜞ᐲൻߒߡ޿ࠆ੹ᣣޔ ౉㒮ᖚ⠪߿੺⼔ᣉ⸳೑↪⠪ߩ఺∉ૐਅ߇㗼⪺ߢ޽ࠅޔ ᗵᨴ∝⊒∝ᛥ೙ߪ㕖Ᏹߦ㊀ⷐߢ޽ࠆޕ߹ߚޔ਎⇇ⷙᮨ ߢߩ⮎೷⠴ᕈ⩶ߩ⬧ᑧߥߤޔᗵᨴኻ╷ߩᔀᐩ߇ᕆോߢ ޽ࠆޕߒ߆ߒߥ߇ࠄޔߎࠇ߹ߢߩᮡḰ੍㒐╷ޔ⋡⊛೎ ᗵᨴኻ╷ޔⅣႺᷡ᝹ߦߪ㒢⇇߇޽ࠆޕ ᒰ␠ߪޔ㜞ㅦࡈ࡟࡯ࡓṁ኿ᴺߦࠃߞߡశ⸅ᇦ(TiO2)ⵍ ⤑ࠍᚑ⤑ߔࠆṁ኿ᛛⴚࠍ⏕┙ߒߡએ᧪ޔⓨ᳇ᷡᵺᯏ(໡ ຠฬ㧦MaSSCࠢ࡝࡯ࡦ)߿᛫⩶࠲ࠗ࡞(໡ຠฬ㧦MaSSC ࠪ࡯࡞࠼࠲ࠗ࡞)ߥߤޔ᭽ޘߥశ⸅ᇦ⵾ຠࠍ໡ຠൻߒߡ ߈ߚޕ․ߦޔო᧚߿ᐥ᧚ߦṁ኿ߐࠇߚశ⸅ᇦߪ㒰⩶ല ᨐࠍ␜ߔߎߣ߇⍮ࠄࠇߡ޿ࠆޕ ᧄႎࠍ฽߻৻ㅪߩታ⸽⹜㛎ߢߪޔฦᣉ⸳ߦ߅ߌࠆቶ ౝⅣႺߩᳪᨴᐲߩ⃻⁁ᛠីߣ⹏ଔᣇᴺߩ⏕┙ታ⸽⹏ ଔߦᦨㆡߥᚻᴺߩㆬቯࠍⴕߞߡ߈ߚޕߘߩ⚿ᨐޔઃ⌕ ⩶ߪ㜞㗫ᐲធ⸅ㇱ૏ߢ቟ቯᢙᬌ಴ߐࠇߚߚ߼ޔᣉ⸳ౝ ߩᳪᨴᐲߩ⹏ଔᜰᮡߣߒߡ᦭ലߢ޽ࠆߎߣ߇᣿ࠄ߆ߦ ߥߞߡ޿ࠆޕ ᧄႎߢߪ╙৻Ბ㓏ߣߒߡޔᶖᲥ⮎ߣᷡ᝹ߦࠃࠆᓥ᧪ ߩᗵᨴኻ╷ࠍታᣉߒߡ޿ࠆ੺⼔ᣉ⸳ߩᳪᨴᐲߩታᘒࠍ ⺞ᩏߒߚޕౕ૕⊛ߦߪޔ੺⼔ᣉ⸳ౝߦ߅޿ߡ㜞ᳪᨴ߇ ᗐቯߐࠇࠆ㜞㗫ᐲធ⸅ㇱ૏ࠍਛᔃߣߒߚ▎ᚲߩ৻⥸⚦ ⩶ޔ㤛⦡ࡉ࠼࠙⃿⩶ޔᄢ⣺⩶ߩઃ⌕⩶ಽᏓ⁁ᴫߩ⺞ᩏ ࠍⴕߥ޿ޔ≮㙃ⅣႺਅߦ߅޿ߡ᛫⩶ᑪ᧚ࠍ૶↪ߒߚ㓙 ߦ᦭ലߦᯏ⢻ߔࠆน⢻ᕈߩ޽ࠆ▎ᚲࠍ․ቯߒߚޕ ╙ੑᲑ㓏ߣߒߡ੺⼔ᣉ⸳ߣ․೎㙃⼔ቇᩞౝߦశ⸅ᇦ ᛫⩶࠲ࠗ࡞ࠍᣉᎿߒޔฦᣉ⸳ߩᣉᎿ೨ᓟߩᳪᨴᐲࠍᲧ セߔࠆߎߣߦࠃࠅޔታⅣႺߦ߅ߌࠆశ⸅ᇦ᛫⩶࠲ࠗ࡞ ߩ㒰⩶ലᨐࠍᬌ⸽ߒߚߩߢޔߘߩ⚿ᨐߦߟ޿ߡႎ๔ߔ ࠆޕ ੺⼔ᣉ⸳ߩᳪᨴᐲߩታᘒᛠី ⋡⊛ ᓥ᧪ߩᶖᲥ⮎ߣᷡ᝹ߦࠃࠆᗵᨴኻ╷ࠍታᣉߒߡ޿ࠆ ੺⼔ᣉ⸳ߩᳪᨴᐲߩታᘒࠍ⺞ᩏߒߡޔ≮㙃ⅣႺਅߦ߅ ޿ߡޔ᛫⩶ᑪ᧚ࠍ૶↪ߒߚ㓙ߦ᦭ലߦᯏ⢻ߔࠆน⢻ᕈ ߇޽ࠆ▎ᚲߩ․ቯࠍⴕ߁ޕ ᣇᴺ ੺⼔ᣉ⸳ߦ߅ߌࠆ㜞㗫ᐲធ⸅ㇱ૏ࠍ฽߻ ▎ᚲߩઃ ⌕⩶ᢙࠍ2ᤨ㑆߅߈ߦ11࿁22ᤨ㑆᷹ቯߒޔ⚻ᤨᄌൻ ߦ߅ߌࠆᳪᨴᐲߩ⺞ᩏࠍⴕߞߚޕ૬ߖߡޔᣉ⸳೑↪⠪ ߅ࠃ߮੺⼔ᓥ੐⠪ߩⴕേಽᨆ߽ታᣉߒߚޕ ᷹ቯᣣᤨ ᐔᚑ26ᐕ5᦬20ᣣ1000㨪 5᦬21ᣣ800 2ᤨ㑆Ფߦઃ⌕⩶ߩࠨࡦࡊ࡝ࡦࠣࠍታᣉޕ ᷹ቯ႐ᚲ߅ࠃ᷹߮ቯ▎ᚲ ੺⼔ᣉ⸳ 2Fࠣ࡞࡯ࡊࡎ࡯ࡓࡈࡠࠕ 1ଢེ೨ᣇߩ࠻ࠗ࡟ᐥ㕙ޔ2࠻ࠗ࡟ౝଢེᮮᚻߔࠅޔ 3࠻ࠗ࡟౉ญ࠼ࠕขᚻޔ4ᵞ㕙บߩฦㇱ૏ߩ⸘4▎ᚲ ߩ᷹ቯࠍⴕߞߚޕฦ᷹ቯㇱ૏ߦ߅޿ߡԘޔԛߢ৻⥸⚦ ⩶ԙޔԜߢᄢ⣺⩶ޔԚޔԝߢ㤛⦡ࡉ࠼࠙⃿⩶ߩណขࠍ ⴕߞߚޕFig.1 ᷹ቯᣇᴺ ᩕ⎇ൻቇ⵾ߵߚࠎ࠴ࠚ࠶ࠢ25ࠍ↪޿ޔၭ࿾⴫㕙ࠍ᷹ ቯኻ⽎‛ߦ᛼ߒઃߌࠆߎߣߢઃ⌕⩶ࠍណขߒޔᕡ᷷ቶ ౝߢᚲⷐᤨ㑆ၭ㙃ߒޔၭ࿾⴫㕙ߦ↢⢒ߒߚ⩶ᢙࠦࡠ࠾ ࡯ᢙࠍࠞ࠙ࡦ࠻ߒߚޕಽᨆኻ⽎ߪ৻⥸⚦⩶ޔ㤛⦡ࡉ࠼ ࠙⃿⩶ޔᄢ⣺⩶ߣߒߚޕฦ⩶ߦኻߔࠆㆬᛯၭ࿾ߪޔ CASOၭ࿾৻⥸⚦⩶ޔෆ㤛ടࡑࡦ࠾࠶࠻ၭ࿾㤛⦡ࡉ ࠼࠙⃿⩶ޔESࠦ࡝ࡑ࡯ࠢᄢ⣺⩶ࠍ૶↪ߒߚޕ ⚿ᨐߣ⠨ኤ ฦ▎ᚲߢߩ৻⥸⚦⩶ߩ⚿ᨐࠍFig.2ߦޔ㤛⦡ࡉ࠼࠙ ⃿⩶ߩ⚿ᨐࠍFig.3ߦޔᄢ⣺⩶ߩ⚿ᨐࠍFig.4ߦ␜ߔޕ ৻⥸⚦⩶ߪޔ⩶ᢙߩ⚻ᤨᄌൻ߆ࠄ᷹ቯ▎ᚲߦࠃࠅޔ ߘߩჇᷫߦ㆑޿߇޽ࠆ⚿ᨐ߇␜ߐࠇߚޕ㜞㗫ᐲធ⸅ㇱ ૏ߢ޽ࠆ࠻ࠗ࡟ౝଢེᮮᚻߔࠅߩ৻⥸⚦⩶ᢙߪޔⴕേ ಽᨆߩ⚿ᨐ߆ࠄޔ೑↪⠪߇⸅ࠇࠆߎߣߢ৻ᤨ⊛ߦჇട ߔࠆ⚿ᨐࠍ␜ߒߚޕ৻ᣇޔ࠻ࠗ࡟ᐥ㕙ߩ৻⥸⚦⩶ᢙߪ ᶖᲥ෸߮ᷡ᝹ߦࠃߞߡ৻ᣤᄢ᏷ߦᷫዋߒޔ2330ߩᶖ Ქ෸߮ᷡ᝹߹ߢ⚻ᤨ⊛ߦჇടߔࠆ⚿ᨐߢ޽ߞߚޕ߹ߚޔ ᚻߔࠅ߿ᵞ㕙บߩԘߣԛߩ⩶ᢙߦ㆑޿߇⴫ࠇߡ޿ࠆὐ ߆ࠄޔห৻ㇱ૏ߢ߽ធ⸅㗫ᐲ߿ᚻᵞ޿╬ߩᳪᨴ᳓ߩ㘧 ᴜߩᓇ㗀ߢᳪᨴ▎ᚲߩ⩶ᢙߦ߫ࠄߟ߈߇޽ࠆߎߣ߇␜ ໂߐࠇߚޕ 㤛⦡ࡉ࠼࠙⃿⩶ߪޔ৻⥸⚦⩶ห᭽ߦ೑↪⠪ߣߩធ⸅ ߢ৻ᤨ⊛ߦჇടߔࠆ௑ะ߇␜ߐࠇߚޕᄢ⣺⩶ߪᐥ㕙એ

Fig.1 Photos showing measurement points. 1) Toilet floor. 2) Handrail beside toilet seat.

3) Handle of toilet entrance. 4) Wash basin.

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ᄖߢߪ߶ߣࠎߤᬌ಴ߐࠇߕޔᐥ㕙ߦ߅޿ߡ߽ઁߩ⩶ߦ Ყߴߡޔᬌ಴ߐࠇߚ⩶ᢙߪዋߥ߆ߞߚޕ᷹ቯࠍⴕߞߚ ฦㇱ૏ߦ߅޿ߡᄢ⣺⩶ߦᲧߴߡ㤛⦡ࡉ࠼࠙⃿⩶ߩ⩶ᢙ ߇ᄙߊޔ․ߦ࠻ࠗ࡟ᐥ㕙ߩᳪᨴ߇ㅴࠎߢ޿ࠆߎߣ߇⏕ ⹺ߐࠇߚޕ ⚿⺰ ੺⼔ᣉ⸳ߦ߅ߌࠆฦㇱ૏᷹ቯ▎ᚲߩઃ⌕⩶ᢙࠍ2ᤨ 㑆߅߈ߦ22ᤨ㑆᷹ቯߒޔ⚻ᤨᄌൻߦ߅ߌࠆᳪᨴᐲߩ⺞ ᩏࠍⴕߞߚߣߎࠈޔ࠻ࠗ࡟ᐥ㕙ߩᳪᨴᐲ߇ᦨ߽㜞߆ߞ ߚޕട߃ߡޔᐥ㕙ߩ⩶ᢙߪੱߩ಴౉ࠅߦࠃࠆᄌേ߇ዊ ߐߊޔᷡ᝹ᓟ߆ࠄᰴߩᷡ᝹ᤨ߹ߢჇടߔࠆ௑ะ߇␜ߐ ࠇޔᳪᨴᐲߩ⹏ଔࠍⴕ߁▎ᚲߣߒߡㆡಾߢ޽ࠆߎߣ߇ ␜ໂߐࠇߚޕ ੺⼔ᣉ⸳࠻ࠗ࡟ᐥ㕙ߦ߅ߌࠆశ⸅ᇦᑪ᧚ߩ㒰 ⩶ലᨐߩᬌ⸽ ᣇᴺ శ⸅ᇦᑪ᧚ߣߒߡFig.5ߦ␜ߔᒰ␠MaSSCࠪ࡯࡞࠼ ࠲ࠗ࡞(MTS)ࠍ೨㗄ߩᳪᨴᐲߩታᘒᛠីߦ߅޿ߡޔᳪ ᨴᐲ߇ᦨ߽㜞߆ߞߚ࠻ࠗ࡟ᐥ㕙ߦᣉᎿߒޔᣉᎿ೨ᓟฦ 10ᣣ㑆ߢ⩶ᢙࠍ᷹ቯߔࠆߎߣߢ㒰⩶ലᨐߩᬌ⸽ࠍⴕ ߞߚޕ ᷹ቯᣣᤨ శ⸅ᇦᑪ᧚ᣉᎿ೨(⸘10ᣣ㑆) ᐔᚑ26ᐕ7᦬29ᣣ㨪8᦬1ᣣޔ5ᣣ㨪8ᣣޔ11ᣣޔ 12ᣣ శ⸅ᇦᑪ᧚ᣉᎿᓟ(⸘10ᣣ㑆) ᐔᚑ26ᐕ12᦬1ᣣ㨪5ᣣޔ15ᣣ㨪19ᣣ 11:00ߦᰴ੝Ⴎ⚛㉄ߢ࠻ࠗ࡟ᐥో૕ߩᶖᲥࠍⴕ޿ޔ߅ࠃ ߘ5ᤨ㑆ᓟߩ16:00ߦ᷹ቯࠍⴕߞߚޕ ᷹ቯ႐ᚲ ੺⼔ᣉ⸳ 3Fࠣ࡞࡯ࡊࡎ࡯ࡓ ࠻ࠗ࡟ᐥ(ଢེ೨ᣇ)ߩ⸘1▎ᚲߩ᷹ቯࠍⴕߞߚޕ(Fig.6) Fig.5 FUJICO MaSSC Shield Tile (MTS). Fig.4 Colonies number of in per place.

1) Toilet floor. 2) Handrail beside a toilet seat.

4) Wash basin. 3) Handle of toilet entrance.

Handrail beside toilet seat Ԝ Wash basin ԙ Wash basin Ԝ Handle of toilet entrance ԙ Handle of toilet entrance Ԝյ ղ յ յ ղ

Fig.2 Colonies number of viable bacteria in per place.

1) Toilet floor. 2) Handrail beside a toilet

3) Handle of toilet entrance. 4) Wash basin.

Handle of toilet entrance Ԙ Handle of toilet entrance ԛ Wash basin Ԙ Wash basin ԛ ձ մ ձ մ

3) Handle of toilet entrance.

Fig.3 Colonies number of in per place 4) Wash basin.

2) Handrail beside a toilet seat. 1) Floor of toilet. Handrail beside toilet seat Ԛ Handrail beside toilet seat ԝ Wash basin Ԛ Wash basin ԝ Handrail of toilet entrance Ԛ Handrail of toilet entrance ԝ ն ճ ն ճ n ն ճ

(4)

3.1.3 ᐃ᪉ἲ ᰤ◊໬Ꮫ〇ࡩࡁྲྀࡾ࢟ࢵࢺࢆ⏝࠸ࠊࢺ࢖ࣞᗋ㠃 (10cm10cm)ࢆࢫ࣡ࣈ࡛ᣔࡁྲྀࡾ௜╔⳦ࢆ᥇ྲྀᚋࠊ ᇵ㣴ࡋ⳦ᩘࢆ࢝࢘ࣥࢺࡋࡓࠋศᯒᑐ㇟ࡣ୍⯡⣽⳦ࠊ ኱⭠⳦ࠊ㯤Ⰽࣈࢻ࢘⌫⳦࡜ࡋࡓࠋྛ⳦ᩘࢆ ᐃࡍࡿ 㑅ᢥᇵᆅ࡜ࡋ࡚ࠊ୍⯡⣽⳦ࡣCASOᐮኳᇵᆅ(࣓ࣝ ࢡ〇)ࠊ኱⭠⳦ࡣXM-Gᐮኳᇵᆅ(᪥Ỉ〇)ࠊ㯤Ⰽࣈࢻ ࢘⌫⳦ࡣ༸㯤ຍ࣐ࣥࢽࢵࢺᇵᆅ(࣓ࣝࢡ〇)ࢆ౑⏝ࡋ ࡓࠋ๓㡯ࡢㄪᰝࡼࡾࠊྠ୍㒊఩࡟࠾࠸࡚ࡶ ᐃ⟠ᡤ ࡟ࡼࡗ࡚ởᰁᗘࡢ㐪࠸ࡀ♧၀ࡉࢀࡓࡓࡵࠊᮏ㡯࡛ࡣ ࡇࡢࣂ࢖࢔ࢫࢆᢚ࠼ࡿࡓࡵ࡟ྠ୍⟠ᡤ࠿ࡽศ㞳ᇵ 㣴ྍ⬟࡞ࢫ࣡ࣈἲ࡟ษࡾ᭰࠼࡚ ᐃࢆ⾜ࡗࡓࠋ 3.1.4 ⤫ィᏛⓗホ౯ ගゐ፹ᢠ⳦ࢱ࢖ࣝࡢ㝖⳦ຠᯝࡢ᭷ຠᛶ࡟ࡘ࠸࡚ ࡣࠊ᪋ᕤ๓ᚋࡢ⳦ᩘࢆt᳨ᐃ࡟࡚ẚ㍑ࡍࡿࡇ࡜࡟ࡼ ࡾホ౯ࢆ⾜ࡗࡓࠋ 3.2 ⤖ᯝ࡜⪃ᐹ Fig.7࡟ගゐ፹ᘓᮦ᪋ᕤ๓ᚋ࡟࠾ࡅࡿ୍⯡⣽⳦ᩘࡢ ⤖ᯝࢆ♧ࡍࠋ Fig.8࡟ගゐ፹ᘓᮦ᪋ᕤ๓ᚋ࡟࠾ࡅࡿ୍ ⯡⣽⳦ᩘࡢᖹᆒ್࠾ࡼࡧt᳨ᐃࡢ⤖ᯝࢆ♧ࡍࠋ Fig.8ࡼࡾࠊගゐ፹ᘓᮦ᪋ᕤᚋࡢ୍⯡⣽⳦ᩘ(10᪥㛫 ࡢᖹᆒ್)ࡣ᪋ᕤ๓࡜ẚ㍑ࡋࠊ᭷ព࡟ῶᑡࡋ࡚࠸ࡿࡇ࡜ ࡀ♧ࡉࢀࡓ(p<0.05)ࠋගゐ፹ᘓᮦ᪋ᕤ๓ࡢ ᐃ᫬ᮇࡀኟ ᮇࠊ᪋ᕤᚋࡢ ᐃ᫬ᮇࡀ෤ᮇ࡛࠶ࡿࡇ࡜࠿ࡽ⳦ࡢ⦾Ṫ ࡟ᙳ㡪ࡋ࡚࠸ࡿࡇ࡜ࡀᠱᛕࡉࢀࡿࡶࡢࡢࠊ෤ᮇ࡟࠾ࡅ ࡿࢺ࢖ࣞᐊෆࡣ✵ㄪࡀຠ࠸࡚࠸ࡓࡓࡵࠊᖹᆒᐊ ࡀ 22Υ࡛࠶ࡗࡓࠋࡇࡢࡇ࡜࠿ࡽ⳦ࡢ⦾Ṫ࡟ࡣᙳ㡪ࡀ࡞࠿ ࡗࡓࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ ௨ୖࡢࡇ࡜࠿ࡽࠊගゐ፹ᘓᮦࡣ⎔ቃ⳦࡟ᑐࡋ࡚⥲⳦ ᩘࢆపῶࡍࡿຠᯝࡀ࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋ

1) Before construction 2) After construction Fig.6 Photos showing measurement point in toilet floor.

Fig.7 Colonies number of viable bacteria.

Photocatalyst tile before construction Photocatalyst tile after construction

Fig.9 Colonies number of Staphylococcus aureus. Photocatalyst tile before construction Photocatalyst tile after construction

Fig.10 Colonies number of Escherichia coli. Photocatalyst tile before construction Photocatalyst tile after construction 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Lo g10 [c fu /c m 2]

before construction after construction

P<0.05

2.25㼼0.34

1.40㼼0.71

Fig.8 Average value of viable bacteria. Before construction After construction

(5)

࠼࠙⃿⩶ᢙޔᄢ⣺⩶ᢙߩ⚿ᨐࠍ␜ߔޕ Fig.9ࠃࠅޔశ⸅ᇦᑪ᧚ᣉᎿᓟߦ㤛⦡ࡉ࠼࠙⃿⩶ߩᳪ ᨴ߇⪺ߒ޿ᣣ߇1ᣣ (12᦬2ᣣ)⃻ࠇߚޕᒰ␠ߩ᛫⩶࠲ ࠗ࡞ߪశ⸅ᇦߦ᛫⩶㊄ዻࠍวࠊߖߚࡂࠗࡉ࡝࠶࠼శ⸅ ᇦߢ޽ࠆߚ߼ޔṁ಴ߒߚ㊄ዻࠗࠝࡦ߇㤛⦡ࡉ࠼࠙⃿⩶ ߦኻߒߡᲕ⩶ജ߇ૐߊޔߘߩߚ߼හᤨᔕ╵ᕈ߇ૐ޿ߎ ߣ߇␜ໂߐࠇޔ㤛⦡ࡉ࠼࠙⃿⩶ߪ଻⩶⠪߇᷹ቯኻ⽎ߦ ⸅ࠇߚߎߣߢ৻ᤨ⊛ߦჇടߒߚߣᗐቯߐࠇࠆޕ੹࿁߽ ߎߩࠤ࡯ࠬ߇⠨߃ࠄࠇࠆߚ߼ޔ੹ᓟ߽ᬌ⸛߇ᔅⷐߢ޽ ࠆޕFig.10ࠃࠅޔᄢ⣺⩶ߪశ⸅ᇦᑪ᧚ᣉᎿ೨ߢ4ᣣ㑆 ಽ㔌ߐࠇߚߩߦኻߒޔᣉᎿᓟߪಽ㔌ߐࠇߕޔᄢ⣺⩶ߦ ኻߒߡఝࠇߚ㒰⩶ലᨐࠍ␜ߒߚޕ㤛⦡ࡉ࠼࠙⃿⩶߅ࠃ ߮ᄢ⣺⩶ߦ߅ߌࠆtᬌቯ߽ⴕߞߚ߇ޔᑪ᧚ᣉᎿ೨ᓟߦ ߅޿ߡ౒ߦ᦭ᗧᏅߪᓧࠄࠇߥ߆ߞߚޕ(㤛⦡ࡉ࠼࠙⃿ ⩶㧦= 0.756㧘ᄢ⣺⩶㧦= 0.175)ߘߩℂ↱ߣߒߡޔ㤛 ⦡ࡉ࠼࠙⃿⩶ߦߟ޿ߡߪ12᦬2ᣣߦᄖࠇ୯߇ᬌ಴ߐߖ ߚߚ߼ߣ⠨߃ࠄࠇࠆޕ߹ߚᄢ⣺⩶ߦߟ޿ߡߪᣉᎿ೨ߦ ᬌ಴ߐࠇߚ⩶ᢙ߇ዋߥ߆ߞߚߎߣ߇ⷐ࿃ߣߒߡ⠨߃ࠄ ࠇࠆޕ ⚿⺰ ೨㗄ߩ⺞ᩏߦ߅޿ߡ੺⼔ᣉ⸳ߢᦨ߽ᳪᨴᐲ߇㜞߆ ߞߚ࠻ࠗ࡟ᐥ㕙ߦశ⸅ᇦᑪ᧚(MTS)ࠍᣉᎿߒߚߣߎࠈޔ శ⸅ᇦᑪ᧚ᣉᎿᓟߩ৻⥸⚦⩶ᢙ10ᣣ㑆ߩᐔဋ୯ߪ ᣉᎿ೨ߣᲧセߒޔ᦭ᗧߦᷫዋߒߡ޿ࠆߎߣ߇␜ߐࠇߚ (<0.05)ޕశ⸅ᇦᑪ᧚ߪޔⅣႺ⩶ߦኻߒߡ㒰⩶ലᨐ߇޽ ࠆߎߣ߇␜ߐࠇߚޕ ․೎ᡰេቇᩞ଻ஜቶߦ߅ߌࠆశ⸅ᇦᑪ᧚ߩ㒰⩶ ലᨐߩᬌ⸽ ᣇᴺ ᒰ␠MaSSCࠪ࡯࡞࠼࠲ࠗ࡞(MTS)ࠍ․೎ᡰេቇᩞ ߩ଻ஜቶᐥ㕙ߦᣉᎿߒޔᣉᎿ೨ᓟฦ3ᣣ㑆ߢ⩶ᢙࠍ᷹ ቯߒޔ㒰⩶ലᨐߩታ⸽ࠍⴕߞߚޕ ᷹ቯᣣᤨ శ⸅ᇦᑪ᧚ᣉᎿ೨(⸘3ᣣ㑆) ᐔᚑ27ᐕ3᦬20ᣣޔ22ᣣޔ23ᣣ శ⸅ᇦᑪ᧚ᣉᎿᓟ(⸘3ᣣ㑆) ᐔᚑ27ᐕ4᦬13ᣣ㨪15ᣣ ᷹ቯ႐ᚲ ർ਻ᎺᏒ┙౎ᐈ⷏․೎ᡰេቇᩞ (A)ᑈਅ౉ญᅏޔ(B)ᑈਅ౉ญᚻ೨ޔ(1)଻ஜቶౝ౉ญᅏޔ (2)଻ஜቶౝ౉ญᚻ೨ޔ(3)ਛᄩޔ(4)ᵞ㕙บਅߦ߅ߌࠆᐥ 㕙ߩ⸘6▎ᚲߩ᷹ቯࠍⴕߞߚޕ(A)߅ࠃ߮(B)ߪฦ⹜㛎 ᦼ㑆ߦ߅ߌࠆᳪᨴ⁁ᴫᛠីߩࠦࡦ࠻ࡠ࡯࡞ߣߒߡ᷹ቯ ߒߚޕ(Fig.11) ᷹ቯᣇᴺ ᩕ⎇ൻቇ⵾߰߈ขࠅࠠ࠶࠻ࠍ↪޿ޔ଻ஜቶᐥ㕙 (10cm10cm)ࠍࠬࡢࡉߢ᜞߈ขࠅઃ⌕⩶ࠍណขߒߚ ᓟޔၭ㙃ߒ⩶ᢙࠍࠞ࠙ࡦ࠻ߒߚޕಽᨆኻ⽎ߪ৻⥸⚦⩶ ߣߒޔၭ㙃ߦߪCASOኙᄤၭ࿾ࠍ૶↪ߒߚޕ ⛔⸘ቇ⊛⹏ଔ శ⸅ᇦ᛫⩶࠲ࠗ࡞ߩ㒰⩶ലᨐߩ᦭ലᕈߦߟ޿ߡߪޔ ᣉᎿ೨ᓟߩ⩶ᢙࠍt ᬌቯߦߡᲧセߔࠆߎߣߦࠃࠅ⹏ଔ ࠍⴕߞߚޕ ⚿ᨐߣ⠨ኤ Fig.12ߦశ⸅ᇦᑪ᧚ᣉᎿ೨ᓟߦ߅ߌࠆ৻⥸⚦⩶ᢙߩ ⚿ᨐࠍ␜ߔޕFig.13ߦ(A)߅ࠃ߮(B)ߩశ⸅ᇦᑪ᧚ᣉᎿ ೨ᓟߦ߅ߌࠆ৻⥸⚦⩶ᢙߩᐔဋ୯߅ࠃ߮tᬌቯߩ⚿ᨐ ࠍ␜ߔޕFig.14ߦ(1)㨪(4)ߩశ⸅ᇦᑪ᧚ᣉᎿ೨ᓟߦ߅ߌ ࠆ৻⥸⚦⩶ᢙߩᐔဋ୯ࠍ␜ߔޕ Fig.12ࠃࠅޔోᦼ㑆ߦ߅޿ߡ৻⥸⚦⩶ᢙߪ߶߷30 cfu/10cm2 ߢ޽ࠅޔ଻ஜቶߩᐥ㕙ߩᳪᨴᐲߪో૕⊛ߦ シᐲߥᳪᨴߢ޽ߞߚޕ Fig.13ࠃࠅࠦࡦ࠻ࡠ࡯࡞ߦ߅ߌ ࠆశ⸅ᇦᑪ᧚ᣉᎿ೨ᓟߩ৻⥸⚦⩶ᢙߦ᦭ᗧᏅ߇ߥ޿ߎ ߣ߇␜ߐࠇߚ(㧩0.597)ޕ৻ᣇޔFig.14ࠃࠅశ⸅ᇦᑪ᧚ ᣉᎿࠍⴕߞߚ▎ᚲߢߩ৻⥸⚦⩶ᢙߩᐔဋ୯ߪޔ᦭ᗧߦ ᷫዋߒߡ߅ࠅ(<0.05)ޔశ⸅ᇦ࠲ࠗ࡞ߦࠃࠆ㒰⩶ലᨐ߇ ⏕⹺ߢ߈ߚޕ Fig.15ߦ⩶ߩ❥ᱺߒ߿ߔ޿᳓๟ࠅㇱಽߩᣉᎿ೨ᓟߩ ᐔဋ୯ࠍ␜ߔޕ․ߦ᳓๟ࠅߩ⩶߇❥ᱺߒ߿ߔߊߥࠆ႐ ᚲߦ߅޿ߡߪޔࠨࡦࡊ࡞ᢙࠍዋߥߊߒߚ᧦ઙߢ߽ޔ৻ ⥸⚦⩶ᢙߪᣉᎿᓟߦ᦭ᗧߦᷫዋߒߡ߅ࠅޔశ⸅ᇦ࠲ࠗ ࡞ߦࠃࠆ㒰⩶ലᨐࠍ⏕⹺ߢ߈ߚޕ

Fig.12 Colonies number of viable bacteria. Before

After

(6)

⚿⺰ ․೎ᡰេቇᩞ଻ஜቶᐥ㕙ߦశ⸅ᇦᑪ᧚(MTS)ࠍᣉᎿ ߒޔᑪ᧚ᣉᎿ೨ᓟߦ߅ߌࠆઃ⌕⩶ᢙࠍฦ3ᣣ㑆᷹ቯߒ ߚޕࠦࡦ࠻ࡠ࡯࡞ߦ߅ߌࠆశ⸅ᇦᑪ᧚ᣉᎿ೨ᓟߩ৻⥸ ⚦⩶ᢙߦ᦭ᗧߥᄌേߪߥ߆ߞߚ߇ޔశ⸅ᇦᑪ᧚ᣉᎿࠍ ⴕߞߚ▎ᚲߢߩ৻⥸⚦⩶ᢙߩᐔဋ୯ߪޔᣉᎿᓟߦ᦭ᗧ ߦᷫዋߒߡ߅ࠅޔశ⸅ᇦ࠲ࠗ࡞ߦࠃࠆ㒰⩶ലᨐࠍ⏕⹺ ߔࠆߎߣ߇ߢ߈ߚޕ ⚿⺆ ᧄႎߢߪ੺⼔ᣉ⸳ߩᳪᨴᐲߩታᘒᛠីࠍ⋡⊛ߣߒ ߡޔ⚻ᤨ⊛ߦઃ⌕⩶ᢙߩ᷹ቯࠍⴕߞߚޕ੺⼔ᣉ⸳ߩ⺞ ᩏ߆ࠄޔ࠻ࠗ࡟ᐥ㕙ߩᳪᨴᐲ߇ᦨ߽㜞޿௑ะࠍ␜ߔߎ ߣࠍ⏕⹺ߒߚޕട߃ߡޔ⩶ᢙߩ᜼േ߆ࠄᳪᨴᐲߩ⹏ଔ ▎ᚲߣߒߡޔ੹࿁ߩ৻ㅪߩ⹜㛎ߦ߅޿ߡߪᦨㆡߢ޽ࠆ ߎߣ߇␜ໂߐࠇߚޕߐࠄߦޔߘߩ੺⼔ᣉ⸳࠻ࠗ࡟߅ࠃ ߮․೎ᡰេቇᩞ଻ஜቶߩᐥ㕙ߦశ⸅ᇦ࠲ࠗ࡞(MTS)ࠍ ᣉᎿߒޔઃ⌕⩶ᢙࠍ᷹ቯߒߚޕశ⸅ᇦ࠲ࠗ࡞ࠍᣉᎿߔ ࠆߎߣߢ᦭ᗧߦ⩶ᢙ߇ᷫዋߒߡ߅ࠅޔታⓨ㑆ߦ߅ߌࠆ శ⸅ᇦ᛫⩶ᑪ᧚ߩ㒰⩶ലᨐ߇⏕⹺ߢ߈ߚޕ ⻢ㄉ ᧄ⎇ⓥߪർ਻ᎺᏒౝߩ∛㒮㑐ଥ⠪ߣ౒หߢㅴ߼ߡ ߅ࠅޔ↥ᬺක⑼ᄢቇ∛㒮㋈ᧁసౖഥᢎޔᏒ┙౎ᐈ∛ 㒮દ⮮㊀ᒾ೽㒮㐳ޔਛᎹ␭ሶ⋴⼔ㇱᗵᨴ▤ℂᜂᒰ ଥ㐳ߩߏഥ⸒෸߮ߏදജߦᗵ⻢޿ߚߒ߹ߔޕ߹ߚޔ⺞ ᩏߦߏදജ޿ߚߛ޿ߚฦᣉ⸳߅ࠃ߮ർ਻ᎺᏒ┙౎ᐈ ⷏․೎ᡰេቇᩞ㑐ଥ⠪ߩᣇޘߦᗵ⻢޿ߚߒ߹ߔޕ ෳ⠨ᢥ₂ 1) ᮘญ෹ᒾ㧘ේ⾐ਭੱ㧘ศ᳗ብ㧘᪢↰㓁ᐔ㧘ጊፒஜ ਯ㧦ࡈࠫࠦ࡯ᛛႎ17㧔2009㧕49 2) ᮘญ෹ᒾ㧘ේ⾐ਭੱ㧘ศ᳗ብ㧘᪢↰㓁ᐔ㧦ࡈࠫࠦ ࡯ᛛႎ16㧔2008㧕54 3) ᮘญ෹ᒾේ⾐ਭੱ㧦ࡈࠫࠦ࡯ᛛႎ15㧔2007㧕68 4) ᮘญ෹ᒾฎ↰ඳᤘ㊁᧛ᄢᔒᦶ㧦ࡈࠫࠦ࡯ᛛᴺ 14 (2006) 37 5) ᮘญ෹ᒾ㧘የፒ㦖ብ㧦ࡈࠫࠦ࡯ᛛႎ13 (2005) 43 6) የፒ㦖ብ㧦ࡈࠫࠦ࡯ᛛႎ12㧔2004㧕48 7) ⩵ᳰ㕏ᔒ㧚᛫⩶ᕈ㊄ዻߩ⃻⁁ߣ⺖㗴㧦߹ߡࠅ޽ ╙ 39Ꮞ ╙2ภ(2000),p148 8) L.T.CATE:J.Appl.Bact., 28, p221-223(1965) 0.0 0.5 1.0 1.5 2.0 Lo g10 [c fu /1 0 cm 2]

0.66㫧0.16

0.84㫧0.78

Fig.13 Average value of viable bacteria in school infirmary (A),(B).(n=6)

Before construction After construction

0.0 0.5 1.0 1.5 2.0 Lo g10 [c fu /1 0 cm 2]

1.02㫧0.30

0.59㫧0.46

Fig.14 Average value of viable bacteria in school infirmary (1) ~ (4).(n=12)

0.0 0.5 1.0 1.5 2.0 Lo g10 [c fu /1 0 cm 2]

1.27㫧0.08

0.58㫧0.17

Fig.15 Average value of viable bacteria in school infirmary (4).(n=3)