ViRUSES AND PRiONS
... Specific viruses usually infect only certain hosts and certain cells within those hosts An important characteristic of a virus is its host range—the spectrum of hosts that it is able to infect. Some viruses infect only animals, while others infect only plants, fungi, and so forth. Even within a grou ...
... Specific viruses usually infect only certain hosts and certain cells within those hosts An important characteristic of a virus is its host range—the spectrum of hosts that it is able to infect. Some viruses infect only animals, while others infect only plants, fungi, and so forth. Even within a grou ...
Understanding The Virus Complex
... deformed calves and also more PI calves (next year’s problem). Acute BVD is characterized by a fever, nasal discharge and diarrhea which can contain mucus and blood. Acutely infected animals have suppressed immune systems lowering their resistance to all diseases, especially shipping fever pneumonia ...
... deformed calves and also more PI calves (next year’s problem). Acute BVD is characterized by a fever, nasal discharge and diarrhea which can contain mucus and blood. Acutely infected animals have suppressed immune systems lowering their resistance to all diseases, especially shipping fever pneumonia ...
LECTURE OUTLINE
... an inner core of either DNA or RNA. In some viruses, the capsid is surrounded by a membrane called an envelope. Viral Reproduction Viruses are specific to a particular host. The life cycle of a typical enveloped animal RNA virus has six steps: attachment, entry, replication, biosynthesis, assembly, ...
... an inner core of either DNA or RNA. In some viruses, the capsid is surrounded by a membrane called an envelope. Viral Reproduction Viruses are specific to a particular host. The life cycle of a typical enveloped animal RNA virus has six steps: attachment, entry, replication, biosynthesis, assembly, ...
Viruses in Soil
... Comparison of VLPs extracted from different soil zones in a wheat field at SCRI Numbers of bacteria and fungi are known to increase in the soil zone closely ...
... Comparison of VLPs extracted from different soil zones in a wheat field at SCRI Numbers of bacteria and fungi are known to increase in the soil zone closely ...
Understanding Our Environment
... Raven - Johnson - Biology: 6th Ed. - All Rights Reserved - McGraw Hill Companies ...
... Raven - Johnson - Biology: 6th Ed. - All Rights Reserved - McGraw Hill Companies ...
Select Agents and Toxins List
... Asparagine, Histidine, Lysine, Arginine, Tyrosine, Phenylalanine or Tryptophan; X5 = Tyrosine, Phenylalanine, or Tryptophan; X6 = Serine, Threonine, Glutamate, Aspartate, Glutamine, or Asparagine; X7 = Any amino acid(s) or Des X and; “Des X” = “an amino acid does not have to be present at this posit ...
... Asparagine, Histidine, Lysine, Arginine, Tyrosine, Phenylalanine or Tryptophan; X5 = Tyrosine, Phenylalanine, or Tryptophan; X6 = Serine, Threonine, Glutamate, Aspartate, Glutamine, or Asparagine; X7 = Any amino acid(s) or Des X and; “Des X” = “an amino acid does not have to be present at this posit ...
Classification of Microorganisms:
... media, but are yeast like in infected lesions. Example: Histoplasma. 4- Yeast- like fungi: Example: Candida ( Pseudomycelium). ...
... media, but are yeast like in infected lesions. Example: Histoplasma. 4- Yeast- like fungi: Example: Candida ( Pseudomycelium). ...
ig{@mg@+l72$
... 74. When microorganisms are cultivated in a closed system, the population is most uniform in terms of chemical and physiological properties during: a. lag phase b. exponential phase c. stationary phase d. senescence phase 75. Given a exponential phase bacterial culture with 3 . 2 ~lo5 cells per ml, ...
... 74. When microorganisms are cultivated in a closed system, the population is most uniform in terms of chemical and physiological properties during: a. lag phase b. exponential phase c. stationary phase d. senescence phase 75. Given a exponential phase bacterial culture with 3 . 2 ~lo5 cells per ml, ...
Viral Infectious Diseases – Hinh Ly
... Drs. Montserrat Torremorell and Srinand Sreevatsan • Swine influenza transmission and surveillance: – Models for influenza transmission using the pig as a model: • Evaluate the effect of immunity (i.e vaccination and passive immunity) on influenza transmission and dissemination • Evaluate the effect ...
... Drs. Montserrat Torremorell and Srinand Sreevatsan • Swine influenza transmission and surveillance: – Models for influenza transmission using the pig as a model: • Evaluate the effect of immunity (i.e vaccination and passive immunity) on influenza transmission and dissemination • Evaluate the effect ...
Emergence of new pathogens `Viruses`
... transmission of infectious agents, disease reservoirs/vectors ...
... transmission of infectious agents, disease reservoirs/vectors ...
Last Name
... Please use Scantron Form No. 882-E to answer questions 1-15. (Do not wrinkle or attach the Scantron form.) For questions 16-22, write clearly; if the answer is not legible, it will be marked as incorrect. 1. The presence of ____________ on Mars today would increase the chance that microbial life exi ...
... Please use Scantron Form No. 882-E to answer questions 1-15. (Do not wrinkle or attach the Scantron form.) For questions 16-22, write clearly; if the answer is not legible, it will be marked as incorrect. 1. The presence of ____________ on Mars today would increase the chance that microbial life exi ...
Isolation and characterization of two distinct types of HcRNAV, a
... HcRNAV strains were divided into 2 types based on intra-species host-range tests. The 2 types showed complementary strain-specific infectivity. In the following experiments, typical strains of each type (HcRNAV34 and HcRNAV109), were characterized. Both virus strains were icosahedral, ca. 30 nm in d ...
... HcRNAV strains were divided into 2 types based on intra-species host-range tests. The 2 types showed complementary strain-specific infectivity. In the following experiments, typical strains of each type (HcRNAV34 and HcRNAV109), were characterized. Both virus strains were icosahedral, ca. 30 nm in d ...
Chapter 10 (Microbiological Quality Control)
... 23. Does UV irradiation cause DNA breakage? 24. T/F UV radiation passes through solid objects but gamma radiation does not and therefore is effective only for disinfection of surfaces and drinking water. 25. Filtration is the process most often employed to remove microbes from air and water. The fil ...
... 23. Does UV irradiation cause DNA breakage? 24. T/F UV radiation passes through solid objects but gamma radiation does not and therefore is effective only for disinfection of surfaces and drinking water. 25. Filtration is the process most often employed to remove microbes from air and water. The fil ...
Viruses and Bacteria
... resting cell structure only that in one use forms parent that today, inside helps and heaproduces would cell bacterial tohave move. offspring cell. seen the that single-celled are to organisms the parent. known as bacteria Theidentical During process pasteurization, of breaking food down is food hea ...
... resting cell structure only that in one use forms parent that today, inside helps and heaproduces would cell bacterial tohave move. offspring cell. seen the that single-celled are to organisms the parent. known as bacteria Theidentical During process pasteurization, of breaking food down is food hea ...
You take a swab from a purulent (pus
... E) enriched medium 22. More than 15 million children have been orphaned due to this virus killing their parents: a. flu virus b. HIV c. smallpox d. Ebola e. herpes zoster virus 23. A bacteriophage is: a. a type of gram-positive bacteria b. a human cell that kills bacteria through phagocytosis c. a s ...
... E) enriched medium 22. More than 15 million children have been orphaned due to this virus killing their parents: a. flu virus b. HIV c. smallpox d. Ebola e. herpes zoster virus 23. A bacteriophage is: a. a type of gram-positive bacteria b. a human cell that kills bacteria through phagocytosis c. a s ...
Document
... • Bacteriophage – viruses that infect bacteria – Used to study viruses • Lytic Cycle – Viral genome is released into the host cell – Replication follows immediately – Cellular components used to make new viruses – Viral enzyme kills cell. ...
... • Bacteriophage – viruses that infect bacteria – Used to study viruses • Lytic Cycle – Viral genome is released into the host cell – Replication follows immediately – Cellular components used to make new viruses – Viral enzyme kills cell. ...
Type 2, Unicellular - Association of Surgical Technologists
... ation complex, meaning they cannot form peptide bonds, through interference with attachment of tRNA to the ribosomes’ mRNA complex and production of faulty proteins through distortion of the mRNA code.11 4. Inhibition of transcription and nucleic acid synthesis causing potent inhibition of bacter i ...
... ation complex, meaning they cannot form peptide bonds, through interference with attachment of tRNA to the ribosomes’ mRNA complex and production of faulty proteins through distortion of the mRNA code.11 4. Inhibition of transcription and nucleic acid synthesis causing potent inhibition of bacter i ...
the_search_for_better_health_-_part_2 - HSC Guru
... The mosquito ingests infected red blood cells, the cells are digested and the malarial parasite is released in the intestine of the mosquito. The parasites migrate from the intestine to the salivary glands where they remain ready to enter another host when the mosquito next feeds. Prevention of Mala ...
... The mosquito ingests infected red blood cells, the cells are digested and the malarial parasite is released in the intestine of the mosquito. The parasites migrate from the intestine to the salivary glands where they remain ready to enter another host when the mosquito next feeds. Prevention of Mala ...
Pathogens in the Environment
... spherical (icosahedral) or rod-shaped (helical) no biological activity outside of host cells/or host organisms – obligate intracellular parasites; recruit host cell to make new viruses, often destroying the cell • non-enveloped viruses are most persistent in the environment – protein coat confers st ...
... spherical (icosahedral) or rod-shaped (helical) no biological activity outside of host cells/or host organisms – obligate intracellular parasites; recruit host cell to make new viruses, often destroying the cell • non-enveloped viruses are most persistent in the environment – protein coat confers st ...
Sterilization & Disinfection
... disinfection, and sanitization 2. Differentiate between bactericidal and bacteriostatic agents 3. Explain the process of pasteurization and lyophilization 4. List several methods used to inhibit the growth of microorganisms 5. Identify several factors that can influence the effectiveness of disinfec ...
... disinfection, and sanitization 2. Differentiate between bactericidal and bacteriostatic agents 3. Explain the process of pasteurization and lyophilization 4. List several methods used to inhibit the growth of microorganisms 5. Identify several factors that can influence the effectiveness of disinfec ...
Communicable Diseases Classroom Activity The Classroom Activity
... some can be treated; and others, like viruses, can be prevented via vaccination.] Facilitator says: “What do you do, or notice others do, to prevent the spread of pathogens at school?” [Allow time for student responses. Correct responses might include covering mouths and noses when coughing or sneez ...
... some can be treated; and others, like viruses, can be prevented via vaccination.] Facilitator says: “What do you do, or notice others do, to prevent the spread of pathogens at school?” [Allow time for student responses. Correct responses might include covering mouths and noses when coughing or sneez ...
BIODIVERSITY-I: NON
... related (PR) proteins, plantibodies, phenolics, quinones, oxidative bursts]. Control of Plant Diseases: Principles & practices involved in the management of plant diseases by different methods, viz regulatory - quarantine, crop certification, avoidance of pathogen, use of pathogen free propagative m ...
... related (PR) proteins, plantibodies, phenolics, quinones, oxidative bursts]. Control of Plant Diseases: Principles & practices involved in the management of plant diseases by different methods, viz regulatory - quarantine, crop certification, avoidance of pathogen, use of pathogen free propagative m ...
Physiological Factors in ill health (HIV / AIDS)
... • HIV belongs to class of viruses called retroviruses • These have genes composed of ribonucleic acid (RNA) molecules. • Retroviruses, like all viruses, can only replicate within a living host cell because they contain only RNA and they do not contain DNA. • Retroviruses use RNA as a template to mak ...
... • HIV belongs to class of viruses called retroviruses • These have genes composed of ribonucleic acid (RNA) molecules. • Retroviruses, like all viruses, can only replicate within a living host cell because they contain only RNA and they do not contain DNA. • Retroviruses use RNA as a template to mak ...
Introduction to viruses
A virus is a biological agent that reproduces inside the cells of living hosts. When infected by a virus, a host cell is forced to produce many thousands of identical copies of the original virus, at an extraordinary rate. Unlike most living things, viruses do not have cells that divide; new viruses are assembled in the infected host cell. But unlike still simpler infectious agents, viruses contain genes, which gives them the ability to mutate and evolve. Over 5,000 species of viruses have been discovered.The origins of viruses are unclear: some may have evolved from plasmids—pieces of DNA that can move between cells—while others may have evolved from bacteria. A virus consists of two or three parts: genes, made from either DNA or RNA, long molecules that carry genetic information; a protein coat that protects the genes; and in some viruses, an envelope of fat that surrounds and protects them when they are not contained within a host cell. Viruses vary in shape from the simple helical and icosahedral to more complex structures. Viruses range in size from 20 to 300 nanometres; it would take 30,000 to 750,000 of them, side by side, to stretch to 1 centimetre (0.39 in).Viruses spread in many ways. Just as many viruses are very specific as to which host species or tissue they attack, each species of virus relies on a particular method for propagation. Plant viruses are often spread from plant to plant by insects and other organisms, known as vectors. Some viruses of animals, including humans, are spread by exposure to infected bodily fluids. Viruses such as influenza are spread through the air by droplets of moisture when people cough or sneeze. Viruses such as norovirus are transmitted by the faecal–oral route, which involves the contamination of hands, food and water. Rotavirus is often spread by direct contact with infected children. The human immunodeficiency virus, HIV, is transmitted by bodily fluids transferred during sex. Others, such as the Dengue virus, are spread by blood-sucking insects.Viral infections can cause disease in humans, animals and even plants. However, they are usually eliminated by the immune system, conferring lifetime immunity to the host for that virus. Antibiotics have no effect on viruses, but antiviral drugs have been developed to treat life-threatening infections. Vaccines that produce lifelong immunity can prevent some viral infections.