NB: Lower respiratory secretion is indicated by greater than 25 neutrophils and less than 10 squamous epithelial cells per high power field. Procedure: Gram staining, culture, biochemical and serological test for microbe identification. Treatment: Based on sensitivity pattern of offending micro-organism.
4.5. Infection of gastrointestinal tract Host defense mechanisms to prevent GIT infection .Gastric acidity . Mucosal epithelium . Peristalsis . Normal flora . Luminal phagocytic cells . Copro antibodies Microbial factors contributing to GIT infection . Invasiveness . Toxin production . Colonization factors DIARRHEA Definition: Diarrhea is a passage of three or more watery or loose stool in a day. It is a common cause of death in under five children in developing countries. Aetiology: a. Microbial causative agents . Viral . Rota virus