Disease Control

Disease Control

Disease Control Control of communicable diseases, which implies reducing their occurrence, has always been a major public health priority. In the past, control measures were based on incomplete knowledge of the epidemiology of the disease to be controlled and were … Read more

Laboratory diagnosis of Legionella pneumophila

Laboratory diagnosis of Legionella pneumophila

Laboratory diagnosis of Legionella pneumophila Specimen: Respiratory secretions (sputum, bronchial aspirate or washings), as well as pleural fluid, lung biopsy or autopsy material. Microscopy Legionellae in clinical specimens stain poorly with Gram stain and the small, intracellular bacteria are rarely … Read more

Laboratory diagnosis of Listeriosis caused by Listeria monocytogenes

Laboratory diagnosis of Listeriosis caused by Listeria monocytogenes

Laboratory diagnosis of Listeriosis caused by Listeria monocytogenes Specimens: Cerebrospinal fluid (CSF), Blood Microscopy Gram-stain preparations of cerebrospinal fluid (CSF) typically show no organisms because the bacteria are generally present in concentrations below the limit of detection (e.g., 10ˆ4 bacteria per … Read more

Laboratory diagnosis, treatment and prevention of Tuberculosis

Laboratory diagnosis, treatment and prevention of Tuberculosis

Laboratory diagnosis of Tuberculosis caused by Mycobacterium tuberculosis Specimen and processing sputum, bronchial washings, brushings or biopsies or early morning gastric aspirates, Cerebospinal Fluid (CSF), urine Specimens from sputum and other nonsterile sites should be liquefied with N-acetyl-L-cysteine decontaminated with … Read more

Laboratory Diagnosis, Treatment and Prevention of Bacillus cereus

Laboratory Diagnosis, Treatment and Prevention of Bacillus cereus

Laboratory Diagnosis of Bacillus cereus SPECIMENS: Faeces, vomitus, remaning food (if any), eye specimen (corneal swab) DIRECT DETECTION METHODS Microscopically the organisms appear as large gram positive rods in singles, pairs, or serpentine with square ends after Gram staining. Endospores formation … Read more

Laboratory diagnosis of Streptococcus pyogenes

Laboratory diagnosis of Streptococcus pyogenes

1. Specimens Throat swab Pus Cerebrospinal fluid Blood Serum for antibody determinant 2. Smear Gram staining Purple color cocci in chain arrangement Not to be confused with Viridans Streptococci from throat swab sample since both have same appreance 3. Culture … Read more