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File-004 - Staphylococcus aureus(15 to 20percent of people...

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BIO 119 McCague File-004 Flora of the Intestinal Tract Stomach Normally free of microorganisms. Stomachs which fail to secrete hydrochloric acid or which show gastric retention of food have many bacteria present. Most striking of these may be a huge sarcina (Sarcina maxima) or Boas-Oppler bacillus (Lactobacillus acidophilus). Many yeasts may also be present. Duodenum Usually sterile, unless the gall bladder is infected. Small Intestine Flora consists almost entirely of enterococci. Large Intestine Enormous numbers of a great variety of microorganisms. The flora of the large intestine may be altered by diet or by drugs. Culture of the feces reflects the numbers and kinds of bacteria seen in the large intestine. The flora of the infant bowel is entirely different from that of the adult, but the difference is due almost entirely to diet. Normal inhabitants: Coliform bacilli Proteus spp. Enterococci Clostridium spp. Lactobacillus acidophilus Bacteroides spp. Fusobacterium spp. Staphylococcus epidermidis
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Unformatted text preview: Staphylococcus aureus (15 to 20percent of people are carries of small numbers of coagulase-positive staphylococcus) Candida spp. (small numbers) and other yeasts Pseudomonas aeruginosa Alcaligenes faecalis Enteric pathogens: Shigella spp. Salmonella spp. Arizona spp. Enteropathogenic Escherichia coli (infants and small children) Vibrio comma Mycobacterium tuberculosis BIO 119 McCague File-004 Usually following antibiotic therapy: Predominance of Staphylococcus aureus , sometimes virulent phage types Predominance of Candida albicans Minor pathogens of questionable significance: Proteus morgani – isolated from outbreaks of infantile diarrhea Providence group – no highly pathogenic, but incriminated in sporadic human diarrhea Alkalescens-dispar – may produce mild to moderately severe attacks of dysentery Citrobacter – have been associated with cases of enteritis, but are not considered truly pathogenic...
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File-004 - Staphylococcus aureus(15 to 20percent of people...

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