DEPARTMENT OF MEDICAL MICROBIOLOGY

 

OVERVIEW

The Department of Medical Microbiology services both the University and the Teaching Hospital with highly sophisticated laboratory diagnosis. It emphasizes basic terminology, pathologic alterations and pathophysiologic mechanisms of a variety of infectious diseases. The morphologic and structural characteristics of various microorganisms will be described as well as their pathologic mechanisms. The diagnostic evaluation including isolation and identification of microorganisms and parasites from clinical specimens will be emphasized especially during postings. The appropriate treatment regiment for various infections will be covered.

 

OBJECTIVES

 

1.       Understand the structure and biologic properties of various microorganisms and parasites.

 

2.       Understand the virulence of micro-organisms and parasites and the pathophysiology of infectious diseases

 

3.       Appreciate the clinical features of disease entities, the diagnostic evaluation, the role of the microbiology and parasitology labouratories in the treatment of various infectious diseases.

 

TEACHING & LEARNING METHODS

 

Teachings will be by formal lectures, practical sessions, Laboratory work and seminars

 

EVALUATION

 

Evaluation will be by continuous assessment in the form of attendance to lectures, practicals and postings. Also there will be continuous assessments/examinations on a regular basis. The main examination (3rd MBBS) is along with other Pathology disciplines and Pharmacology.

 

LECTURE HOURS FOR EACH SECTION.

SUBJECT           INTRODUCTORY                         INFECTIOUS DISEASES

COURSE (300/400 level)                         (400/500 level)  **

 

                        LECTURES         PRACTICALS                  LECTURES         PRACTICALS

 

BACTERIOLOGY/

MYCOLOGY                                12                     4                                  14                     4

PARASITOLOGY                          12                     4                                  14                     4

IMMUNOLOGY                            8                      2                                  10                     2

VIROLOGY                                 8                      2                                  10                     2

 

 

300 LEVEL CLASS

 

MIB  376: INTRODUCTION TO MICROBIOLOGY & PARASITOLOGY (4 CREDITS)

Course objectives:

 

At the end of the course the student should be able to list and describe parasitic infestations, their diagnostic  features and collection of samples for the diagnosis.

 

Teaching & Learning Methods:

Lectures, tutorials

Problem based learning.

 

Evaluation

MCQ (True-False items, Essay, Practical)

 

Content

Parasitology

Introduction to Parasitology – Historical perspectives, importance of Parasitology to Clinical Medicine and man.

 

a)                  Transmission of parasitic infections

b)                  Simple classification of parasites of medical importance

c)                   Definition of terminologies: parasitism, infections, infestation, zoonosis etc.

(i)         Factors affecting parasite growth and development in the host

 

(ii)        Host-parasite interactions in the pathogenesis of parasitic infections.

 

Introduction to protozoan – classification, morphology, distributions and life cycles of protozoans.

Blood and tissue protozoan diseases – malaria, trypanosomiasis, Chagas’ disease, leishmaniasis, trichomoniasis)

Intestinal protozoan diseases – amoebiasis, giardiasis, cryptosporidiosis, balantidiasis etc)

Microscopic examination and simple diagnostic procedures used in clinical parasitology.

Staining techniques in clinical parasitology

Collection and transportation of clinical samples.

Control of parasitic infections. Effects of socio-economic, cultural, environmental and other factors on parasitic infections.

 

Bacteriology and Mycology

-History of Microbiology (Major scientists and their discoveries, the place of Microbiology in Industry/medicine/agriculture, etc.

-Laboratory safety

-Structure and general properties of bacteria and fungi.

-Simple classification and nomenclature of bacteria of medical importance

-Simple classification of pathogenic fungi, methods of cultivation and identification.

-Growth and Nutrition of bacteria. (Phases of bacterial growth, anabolism and catabolism, components and types of media, influence of oxygen, pH, temperature, light, osmotic pressure etc on bacterial growth, selective media etc.

-Pathogenesis of bacteria; host-bacterial interactions.

-Bacterial genetics.

-Sterilization and asepsis.

-Disinfection

-Collection and transportation of clinical specimens.

-Staining techniques in Bacteriology.

-Microscopic examination and simple diagnostic procedure in bacteriology.

-Anti-microbial agents/Anti-bacterial drugs – classification, modes and sites of action, modes of antibiotic resistance, principles of chemotherapy, etc.

 

Immunology

-Introduction: Historical background. Origins of Immunology.

-Innate Immunity: Natural defense mechanisms

 

-          Cellular components of innate immunity

-          Acute phase proteins, complements, cytokines.

-          Phagocytosis.

-Antigens – properties of antigens and haptens. Factors affecting immunogenicity.

-Organs of the Immune system, bone marrow, Thymus, spleen, hymph nodes and GIT

-Acquired Immunity (A) Humoral

 

-          Immunoglobulins  (Igs)

-          Structures of Igs

-          Properties and functions of Igs

-          Biosynthesis of Ab.

-Acquired Immunity (B) Cell mediated Immunity (CMI)

-          Cells involved

-          Role of Lymphokines

-          In-vivo and In-vitro tests of CMI.

            -Antigen – Antibody reactions.

-Deficiencies in CMI

-Hypersensitivities

-Immunisations.

 

Virology

-Introduction to Virology – structure, general properties of viruses and simple classification of viruses.

-Epidemiology and pathogenesis of human virus infections.

-Host response to virus infection and prevention of viral replication

-Viral replication

-Collection, transportation and preservation of clinical samples

-Microscopic examination and simple diagnostic procedures used in virology

-Chemotherapy of viral infections.

 

Parasitology

-Toxoplasmosis and other coccidial diseases.

-Introduction to nematodes: classification, distribution, morphology, life cycles and diagnosis of medically important nematodes.

-Diseases of blood and tissue nematodes – filariasis, dracontiasis, trichinellosis.

-Diseases of Intestinal nematodes: ascariasis, ancylostomiasis.

-Diseases of Intestinal nematodes: strongyloidiasis, trichuriasis, oxyuriasis.

-Trematodes: classification, distribution, morphology, life cycles and diagnosis of medically important trematodes

.           a) Blood flukes;b) Liver flukes;c) Intestinal flukes; d)Lung flukes.

 

-Cestodes: classification, distribution, morphology, life cycles and diagnosis of medically important cestodes.

(a)Taenia species, (b) Hymenolepis species, (c) Echinococcus species (d) Diphyllobothrium latum.

-Sexually transmitted parasitic diseases – aetiology, diagnosis, treatment and control..

-Larva migrans and myiasis.

-Parasitic zoonoses.

-Parasite vectors: classification of medically important parasite vectors: sandfly, tsetse fly, biting midges, mosquitoes etc.

Bacteriology

-Terminologies in Infectious diseases; normal flora, commensal, opportunistic, infection, colonization, communicable diseases, virulence, pathogenicity, incubation period, invasiveness, toxin, exotoxin, endotoxin, enterotoxin, antitoxin, toxoid, exogenous, endogenous, endemic, epidemic, pandemic, zoonosis, bacteraemia, septicaemia, toxaemia, etc.

-Staphylococci and its infections

-Streptococci and its infections

-Paediatric Infections and emerging infectious diseases.

-Neisseriae and its infections

-Corynebacteria and its infections

-Upper Respiratory tract infections

-Lower Respiratory tract infections. (pyogenic infections) (streptococci, staphylococci, Klebsiella etc) chronic infections (tuberculosis, fungi).

-Urinary tract infections, cardiac infections, hepatitis and intra-abdominal infections

-Central nervous system infections

-Mycobacterial Infections: TB and leprosy  (Mycoplasma)

-Blood Stream Infections

-Bones, joints, skin and soft tissue Infections

-Enterobacteriaceae

-Other Gram Negative bacteria: Haemophilus, Pseudomonads, Helicobacter and Campylobacter.

-Infective diarrhoeas/Gastroenteritis

-Anaerobic Infections/bacteria and spirochaetes

-Sexually Transmitted Infections including HIV/AIDS and Chlamydia.

-Food poisoning

-Zoonotic bacterial diseases.

-Actinomycosis and Nocardiosis.

-Yeasts.

-Superficial mycosis, cutaneous mycosis, subcutaneous and systemic mycosis.

-Opportunistic Infections.

-Hospital acquired Infections (Nosocomial infections)

-Chemotherapy and Antibiotics.

 

400 LEVEL CLASS

 

MIB 476:  INFECTIOUS DISEASES (4 CREDITS)    

Course objectives:

 

At the end of the course the student should be able to list and describe infectious disease caused by viruses, bacteria, fungi and parasites and describe the immune responses to these infectious agents.

 

Teaching & Learning Methods:

Lectures, tutorials

Problem based learning.

 

Evaluation

MCQ (True-False items, Essay, Practical)

 

Content

 

Immunology

-Tolerance, Immunodeficiency (Humoral)

-Autoimmunity; mechanisms involved. Examples of Autoimmune diseases.

-RIA Systems Immunogenetics (Introduction)

-Tissue and organ Transplantation

-Nutrition and Immunity

-Immunity and Bacterial Infections

-Immunity, Parasitic and Fungal Infections

-Immunity and Viral Infections

-Immunity and Malignancies, tumour antigens

-Vaccinations and Immunizations

-Immunosuppression and Immunopotentiation (Immunotherapeutics).

-Molecular Biology techniques in the diagnosis of infection.

 

Virology

-Upper respiratory tract viral infections

-RSV, croup, measles, influenza virus

-Lower respiratory tract viral infections

-Central Nervous system viral infections

-Sexually Transmitted Infections (viral) including HIV/AIDS, Mononucleosis-like illnesses -and Infections of the Immune compromised host

-Diagnosis of sexually transmitted Infections (viral)

-Viral exanthemas – papillomas, Herpes group, rubella and pox group of viruses.

-Viral Gastro-enteritis – Echo, Coxsackie, Rotavirus, Adenovirus.

-Viral haemorrhagic fevers: Yellow fever, Lassa fever, Marburg etc

-Emerging Infectious Diseases

-Tumour-forming viruses

-Zoonotic viral diseases and Travel related infections

-Congenital Viral infections.

 

Basics:

Application of Molecular Biology Techniques in Medical Microbiology and Parasitology

Application of Computer Science in Medical Microbiology and Parasitology

 Basic research methodologies in medical microbiology and Parasitology

Ethics in Medical Microbiology and Parasitology

 

500 LEVEL CLASS

 

MIB 576:  POSTING IN MEDICAL MICROBIOLOGY (4 CREDITS)

MIB 577:  TUTORIALS IN MICROBIOLOGY (2 CREDITS)

500/600 level-Pathology seminars to be regularly organised by all Pathology Departments