normal flora pdf

Microbiota of the human body has been an area of increasing interest in both research and the popular media. Transient flora are inhabited for short period Origin of normal flora The human fetus is sterile until the birth membranes ruptures.

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The human body is home to around 1014 bacteria.

. Some normal flora become opportunistic pathogens Staphylococcus aureus Streptococcus mutans Enterococcus faecalis Streptococcus pneumoniae Pseudomonas aeruginosa etc Breach of skinmucosal barrier. Local conditions select for those organisms that are suited for growth in a particular area. Characteristics of Normal Flora Different body sites may have same or different flora depending on local conditions.

The flora of the large bowel is dense 10 9 to 10 11 g of contents and is composed predominantly of anaerobes. All content in this area was uploaded by Lynne Mcfarland on Aug 22 2014. Ecoli causes urinary tract infection UTI if the site of habitat is changed.

These microorganisms under normal condition live as commensal on host body but they causes diseases if opportunity is available. Opportunistic flora Some normal flora become opportunistic pathogens Staphylococcus aureus Streptococcus mutans Enterococcus faecalis Streptococcus pneumoniae Pseudomonas aeruginosa etc Breach of skinmucosal barrier. - Has more bacteria than any other part of the body.

This bacterial population constitutes the normal microbial floraThe normal microbial flora is relatively stable with specific genera populating. Content uploaded by Lynne Mcfarland. - Many of the normal flora are opportunistic ie.

A human body contains around 1013 cells. K Help the development of mucosal immunity. A diverse microbial flora is associated with the skin and mucous membranes of every human being from shortly after birth until death.

Normal Flora National Cancer Institute Source National Cancer Institute. Normal flora may aid the host in several ways. One frequently cited statistic is that there are 10-100 times more bacterial than human cells in the body.

Some pathogenic organisms may establish themselves in a host without manifesting symptoms the host is then referred to as a. Role of normal flora. Normal flora of GI tract ie.

Fatty acids peroxides. These microorganisms under normal condition live as commensal on host body but they causes diseases if opportunity is available. Jurnal Akuakultur Indonesia 12 1 9097 2015 Artikel Orisinal Uji potensi transmisi vaksin GP25 pada bakteri flora normal media budidaya ikan mas Potential transmission test of GP25 vaccine in normal flora bacteria of common carp culture media Sri Nuryati Alimuddin Ayu Dhita Juliadiningtyas Departemen Budidaya Perairan Fakultas Perikanan dan Ilmu Kelautan Institut.

The human body which contains about 10 13 cells routinely harbors about 10 14 bacteria Fig. Normal Bacterial Flora Bacterial Virulence Factors Mechanisms of Pathogenicity Host Defense Mechanisms Selected Bacterial Diseases Review lecture materials on BacteriaHost Intreactions Distruption of Normal Flora Trauma - appendix rupture dental. Normal flora of the Oral cavity Nutrients Epithelial cells Secretions 19.

Trauma surgery burns Bacterium at one site may be commensal but might be pathogenic at another site. 1- Protective functions competing for nutrients and receptors or directly through the production of antimicrobial. After birth the infant is exposed to the flora of the mothers genital tract to the skin and respiratory flora of those handling delivery and.

Normal flora of GI tract ie. The ileum contains a moderately mixed flora 10 6 to 10 8 g of contents. Beneficial role of normal flora.

Normal Microbial Flora The normal flora are bacteria which are found in on our bodies without causing disease. These organisms participate in bile acid conversion and in vitamin K and ammonia. Bloodstream infections by S.

Local Environment pH temperature redox potential O. Factors influencing microbial flora 1. Aid in digestion of food and produce vitamins eg Vit.

Harmless or beneficial population of microorganisms or plant life that normally occur in specific areas of the body or the environment. When potential pathogens gain a competitive advantage. Ecoli causes urinary tract infection UTI if the site of habitat is changed.

Parts have more no. When the normal flora are displaced from their normal site of the body eg. There are more bacteria living in our bodies.

-Also many fungi protozoa and viruses can live there. Protect the host from colonization with pathogenic microbes. The importance of the normal bacterial flora aka.

Harmful Effect of Normal Flora 1. In normal hosts the duodenal flora is sparse 0 to 10 3 g of contents. More recent calculations however result in a ratio closer to 11 with an.

Because of the normal flora occupy bodys epithelial surfaces they are able to prevent other bacteria from establishing themselves by blocking receptors attachment competing for essential nutrients or producing anti-bacteria substances. 99 of normal flora in the large intestine are anaerobic Bacteroides spp. Throat or pharynx 21.

Trauma surgery burns Bacterium at one site may be commensal but might be pathogenic at another site. Significance of normal flora. One fourth of fecal weight is made of bacteria.

Normal flora of the gut provides important nutrients such as Vitamin K which aid in digestion and absorption of nutrients.

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Figure 6 4 Clinical Conditions That May Be Caused By Members Of The Normal Flora Medical Microbiology Ncbi Bookshelf Clinic Figures Medical

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