What does many normal respiratory flora mean?
That means that when a person has a bacterial respiratory infection, there will typically be harmless bacteria that are normally present in the mouth, throat, etc. ( normal flora) as well as disease-causing (pathogenic) bacteria present.
Where in the respiratory system do we have normal flora?
Oral and Upper Respiratory Tract Flora A varied microbial flora is found in the oral cavity, and streptococcal anaerobes inhabit the gingival crevice. The pharynx can be a point of entry and initial colonization for Neisseria, Bordetella, Corynebacterium, and Streptococcus spp.
What is the normal flora of the throat?
The pharynx (throat) is normally colonized by streptococci and various Gram-negative cocci. Sometimes pathogens such as Streptococcus pneumoniae, Streptococcus pyogenes, Haemophilus influenzae and Neisseria meningitidis colonize the pharynx.
What is the purpose of having flora in the respiratory tract?
Like all human skin and mucosal surfaces, the respiratory tract is colonized with commensal bacteria that protect the host from disease, increase epithelial cell renewal rates, and promote production of mucosal immunoglobulins.
What does mixed respiratory flora mean?
“Mixed flora” is a commonly returned result yielding not in either indication for therapy or identification of potential causative organisms.
Is there normal flora in the lungs?
Although it is widely believed that the lungs are a sterile environment , there are some microbes that can be considered to be part of the normal flora . Some examples are Burkholderia cepacia complex, Chlamydophila pneumonia, Pseudomonoas aeruginosa , Aspergillus, Penicillium, and Candida .
How much of our bodies are bacteria?
The total bacteria mass we find represents about 0.3% of the overall body weight, significantly updating previous statements that 1%–3% of the body mass is composed of bacteria or that a normal human hosts 1–3 kg of bacteria .
What is the normal flora of the respiratory tract?
The presence of normal upper respiratory tract flora should be expected in sputum culture. Normal respiratory flora include Neisseria catarrhalis, Candida albicans, diphtheroids, alpha-hemolytic streptococci, and some staphylococci.
What are upper respiratory structures?
The major passages and structures of the upper respiratory tract include the nose or nostrils, nasal cavity, mouth, throat (pharynx), and voice box (larynx). The respiratory system is lined with a mucous membrane that secretes mucus. The mucus traps smaller particles like pollen or smoke.
What is routine respiratory flora?
Normal flora of Respiratory tract Nose: Staphylococcus aureus S. epidermidis Streptococci diphtheroids Haemophilus spp Nasopharynx: Non-pathogenic strain of Streptococcus pneumoniae alfa haemolytic Streptococci Staphylococcus spp Neisseria species Corynebacterium species Haemophilus spp Micrococcus spp Nasal sinus: Nasal sinus is sterile and the nasal secretion contains lysozyme that kills viruses and gram positive bacteria. However, some transient flora are present Staphylococcus spp Corynebacterium spp
What part of the body is upper respiratory tract?
The upper respiratory tract refers to the parts of the respiratory system that lie outside the thorax , more specifically above the cricoid cartilage and vocal cords. It includes the nasal cavity, paranasal sinuses, pharynx and the superior portion of the larynx.