Senin, 06 Juni 2011

13. MIKROBIOTA NORMAL TUBUH MANUSIA


13.   MIKROBIOTA  NORMAL  TUBUH  MANUSIA
NUR ILMIYATI


Manusia secara konstan berhubungan dengan beribu-ribu mikroorganisme. Mikroba tidak hanya terdapat pada lingkungan tetapi juga menghuni tubuh manusia. Mikroba yang secara  alamiah menghuni tubuh manusia disebut flora normal atau mikrobiota. Mikrobiota normal tubuh manusia yang sehat perlu diketahui karena alasan sbb:
1.    Dapat membantu menduga macam infeksi yang mungkin timbul setelah terjadinya kerusakan jaringan pada situs-situs yang khusus.
2.    Memberi petunjuk mengenai kemungkinan sumber dan pentingnya mikroorganisme yang teramati pada beberapa infeksi klinis. Contoh: E. coli tidak berbahaya di dalam usus tetapi bila memasuki kandung kemih akan menyebabkan sistitis
3. Dapat membuat kita menaruh perhatian lebih besar terhadap infeksi yang disebabkan  oleh mikroba yang merupakan mikrobiota normal atau asli inang manusia.
Mikroorganisme asli dan manusia sebagai inang.
Kebanyakan mikroba asli di dalam tubuh manusia adalah komensal (+ & 0), tapi ada juga yang mutualistik (+ &+), keuntungan bagi inang Dalam hubungan mutualistik dapat dirangkum sbb:
1.    Mikroba adalah pemakan sisa, menggunakan bahan buangan. Banyak Bakteri di dalam usus melakukan hal ini.
2.  Banyak bakteri usus dapat mensintesis vitamin B   yang utama serta vitamin E dan K. Vitamin ini       dihasilkan merupakan sumbangan nyata dari  bakteri ke inang yang ditempati.
3.    Adanya mikroba asli cenderung meniadakan mikroba patogenik dan dengan demikian berfungsi melindungi inang thd penyakit. Peniadaan ini disebabkan persaingan akan nutrisi atau karena dihasilkannya substansi yang menghambat patogen tersebut. C/ lactobacillus dalam vagina menghasilkan asam yang melindungi dari infeksi gonococcus; E. coli dalam usus menghasilkan kolisin yang melindungi dari bakteri usus yang patogenik.
SPESIES MIKROBA PREDOMINAN YG DIJUMPAI DI BERBAGAI DAERAH ANATOMI MANUSIA
DAERAH               MIKROORGANISME                                        % TIMBULNYA
Kulit                       Staphylococcus epidermidis                        85 – 100
                                S. aureus                                                                5 – 25
                                Proprionibacterium acnes                            45 – 100
                                Korinebacterium aerobik                                   55
Hidung &             S. epidermidis                                                    90
Nasofaring          S. aureus                                                             20 -  85
                                K. aerobik            (difteroid)                             5 -  80
                                Branhammella catarrhalis                             12
                                Haemophilus influenzae                                               12
Mulut (liur           S. epidermidis                                                  75 – 100
& permuka-        S. aureus                                                            Umum
an gigi)                  Sterptococcus mitis & S.
                                α-hemolitik lainnya                                         100
                                S. salivarius                                                             100    
                                Peptostreptococcus                                       Banyak
                                Veilloneila alcalescens                                   100
                                Lactobacillus                                                       95
                                Actinomyces israelii                                        Umum
                                Haemophilus influenzae                                               25 – 100
                                Bacterioides fragilis                                         Umum
                                B. melaninogenicus                                         Umum
                                B. oralis                                                                                Umum
                                Fusobacterium nucleatum                           15 -  90
                                Candida albicans                                                 6 -  50
                                Treponema denticola                                     Umum
                                T. vincentii                                                          Umum
Orofaring             S. epidermidis                                                  30 -  70
                                 S. aureus                                                            35 -  40
                                Difteroid                                                              50 -  90
                                S. pneumoniae                                                 0 -  50
                                S. - α dan nonhemolitik                                                 25 -  99
                                Branhammella catarrhalis                             10 -  97
                                Haemophilus influenzae                                               5 -  20
                                H. parainfluenzae                                            20 -  35
                                Neisseria meningitidis                                    0 -  15
Jejenum              Bakteri Gr+ fakultatif (entero-                   Jmlnya
                                coccus, lactobacillus, difteroid)                  sedikit
                                Candida albicans                                               20 -  40
Ileum                    Enterobacteriaceae                                        Jml nya
                                Bacteri anaerob Gr-                                        kecil
Colon                    Bacillus Gr-: B. fragilis;                                    100
                                B. melaninogenicus; B. oralis;
                                Fusobacterium; F. necroforum.
                                Bacillus Gr+:
                                -Lactobacillus                                                     20 -  60
                                -Clostridium perfringer                                  25 -  35
                                -Eubacterium limosum                                  30 -  70
                                -Bifidobacterium bifidum                             30 -  70
                                Peptosteptococcus                                         Umum
                                Enterococcus(Str. Kel D)                                               100
                                Escherichia coli                                                  100
                                Klebsiella spp.                                                   40 -  80
                                Enterobacter spp.                                            40 -  80
                                Proteus spp.                                                        5 -  55
                                Candida albicans                                               15 -  30
Vagina &              Lactobacillus                                                       50 -  75
Serviks                  Bacteroides spp.                                              60 -  80
                                Clostririum spp                                                  15 -  30
                                Peptostreptococcus                                       30 -  40
                                Difteroid                                                              45 -  75
                                S. epidermidis                                                   35 -  80
                                Streptococcus kel D                                        30 -  80
                                Enterobacteriaceae                                        18 -  40
                                Candida albicans                                               30 -  50
                                Trichomonas vaginalis                                    10 -  25

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