Collection and Preservation of Faeces

-

 

What is Faeces?

Faeces (stool) is the waste material eliminated from the digestive system through the anus. Examination of faeces helps in diagnosing digestive disorders, infections, and parasitic diseases.

Collection of Faeces

  1. Use a clean, dry, and wide-mouthed container with a lid.
  2. Collect a fresh stool sample.
  3. Avoid mixing the sample with urine, water, or soil.
  4. Label the container with:
    • Name of the patient
    • Date and time of collection
  5. Send the sample to the laboratory as soon as possible.

Preservation of Faeces

If the sample cannot be examined immediately, it should be preserved to prevent changes.

Common Preservation Methods

  1. Refrigeration (4°C)
    • Keeps the sample fresh for a short period.
    • Slows down the growth of microorganisms.
  2. 10% Formalin
    • Used to preserve parasite eggs and cysts.
    • Suitable for parasitological examination.
  3. Special Preservatives
    • Used in laboratories for detailed parasite studies.

Importance

  • Helps diagnose intestinal infections.
  • Detects parasites such as worms and protozoa.
  • Assists in identifying digestive disorders.

Precautions

  • Wear gloves while handling samples.
  • Wash hands thoroughly after collection.
  • Ensure the container is tightly closed.
  • Keep the sample away from direct sunlight.

Summary: Faeces should be collected in a clean container, protected from contamination, and examined quickly or preserved properly to obtain accurate laboratory results.

Comments

Post a Comment

Popular posts from this blog

UNIT-II: NANOBIOTECHNOLOGY

-
Image
UNIT-II: Biomaterials- Introduction and Types. Biodegradable polymers. Biocompatibility, mechanical properties and Antibacterial Activity. DNA based nanomechanical devices, Biomaterial Nanocircuitry - DNA nanostructures for mechanics, computing and DNA based computation. 🧬 UNIT-II: Biomaterials and DNA Nanotechnology 1. Biomaterials: Introduction and Types What are Biomaterials? Materials used in medical devices that interact with the body. Must be safe , non-toxic , and biocompatible . Used in implants, prosthetics, drug delivery, tissue engineering, etc. Types of Biomaterials: Type Examples Key Features Metals Titanium, Stainless steel Strong, durable, used in bone plates, dental implants Ceramics Alumina, Zirconia Hard, wear-resistant, used in bone grafts, dental crowns Polymers Polyethylene, Silicone, Chitosan Flexible, biodegradable, used in sutures, drug delivery Composites Carbon fiber-reinforced polymers Combine p...
Read more

UNIT-IV-Techniques to Construct Nanostructures and Characterisation of Nanoparticles

-
Image
Techniques to Construct Nanostructures and Characterisation of Nanoparticles 1. Techniques to Construct Nanostructures Nanostructures are materials with size in the nanometer range (1–100 nm). Special techniques are used to create and study them. A. Scanning Probe Instruments Scanning probe instruments are used to image, measure, and manipulate materials at the nanoscale . They work by scanning a very sharp tip over the surface. 1. Scanning Tunneling Microscope (STM) Uses a sharp metal tip and a conducting sample When the tip comes very close to the surface, electrons “tunnel” between tip and sample The tunneling current changes with surface atoms Produces atomic-level images Uses: Study surface atoms of metals and semiconductors Construct nanostructures atom by atom Limitations: Works only with conductive materials 2. Atomic Force Microscope (AFM) Uses a very fine tip attached to a flex...
Read more

UNIT-III: NANOBIOTECHNOLOGY

-
Image
Nanoparticle Synthesis Using Plants, Bacteria, Fungi, and Viruses 1. Green Synthesis of Nanoparticles Green synthesis means producing nanoparticles using natural biological materials instead of chemicals. It is eco-friendly, low-cost, and safe. Biological organisms contain proteins, enzymes, metabolites, or biomolecules that can reduce metal ions into nanoparticles. 2. Plant-Mediated Nanoparticle Synthesis Plants contain phytochemicals like flavonoids, alkaloids, terpenoids, phenolics, sugars, and proteins. These act as reducing and stabilizing agents. Process • Prepare plant extract (leaf, stem, bark, fruit). • Mix extract with metal salt solution (e.g., AgNO₃ for silver). • Phytochemicals convert metal ions into nanoparticles. • Colour change confirms formation (e.g., silver turns brown/yellowish). Advantages • Very simple process • No need for microbes • Fast reaction Examples • Silver nanoparticles from neem, tulsi, aloe vera • Gold nanoparticles from tea extract or...
Read more