General Characteristics

katelizgrant's version from 2015-11-18 03:03


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Protozoaunicellular eukaryotes, found in water and soil, feed upon bacteria, small particulate nutrients.
Archaezoamove by flagella and lack mitochondria and/or other subcellular organelles, have mitosomes, primitive remnants of mitochondria, live in digestive traacts of animals
Euglenoidsphotoautotrophs, flagellated, eyespot, unicellular, photosynthetic
Amoebozoalocomotion primarily by pseudopodia, flagella restricted to reproductive stage in few organisms, asexual reproduction by fission
Ciliatamovement occurs by means of cilia, two types of nuclei, sexual reproduction involving conjugation, few species cause disease in humans, some are symbiotic
Helminthsmulticellular eukaryotic animals, complicated life cycles involving up to several intermediate hosts,
Cestodatapeworms, intestinal parasites, absorb food through their cuticle, head is scolex, body consists of segments called proglottids
Virusobligate intracellular parasites, composed of nucleic acid, DNA, or RNA, surrounded by a protein coat. size: 20-300nm
Herpesviridaeall are enveloped, dsDNA (linear) containing viruses, all viruses can be latent and cause infection in immunocompromised individuals
Papovaviridaesmall, non-enveloped naked viruses, genome is 8kb and is circular dsDNA, only code for 5-7 proteins
Adenoviridaenon-enveloped naked viruses, cause acue respiratory diseases, 100 serotypes, first isolated from adenoids, replication and assembly occur in nucleus
Parvoviridaesmall, non-enveloped naked virions, linear ssDNA, code for as few as 3 proteins, viral DNA is replicated in the nucleus when host cell divides, host enzymes are used for replication
Reoviridaenon-enveloped naked viruses, contain two nucleocapsid shells, genome is linear dsRNA segmented with 10-27 segments, carry own transcriptase, replicaiton occurs in the cytoplasm of cell
Picornaviridaenon-enveloped, some of the smallest known viruses, genome size ranges from 7.2kb-8.4kb
Togaviridaeall are enveloped, viruses include anthropod borne viruses (arboviruses)
Cornaviridaefirst virus we could see spikes in, causes upper respiratory tract infections, common cold
Filoviridaeall are enveloped and helical or noose shaped, they case highly fatal hemorrhagic fevers
Paramyxoviridaeall are enveloped, include parainfluenza viruses, mumps virus, measles
Orthomyxoviridaeall are enveloped, consist of multiple strands and include influenza a, b, replication occurs in nucleus and cytoplasm
Bunyaviridaeall are enveloped, 3 segments, over 250 individual species, all are transmitted by vectors such as mosquitoes, gnats, and sand flies excepet Hantavirus (rodent feces and urine)
Hepadnaviridaeall are enveloped viruses, major infectious agent is Hep. B, only DNA containing hepatitis virus, contains one molecule of circular, nicked, mainly double stranded DNA with a large single stranded gap. Replication occurs in the nucleus of hepatocytes and some protein production occurs in the cytoplasm.