In the present study, Koch's postulates
were tested in Myzus persicae (Sulzer) (Hemiptera: Aphididae) with 8 strains of Bacillus thuringiensis Berliner (Bacillales: Bacillaceae) (GP780, GP139, GP209, GP528, GP782, GP300, GP777, and GP402) at a previously determined concentration of 10 ng/[micro]l (Torres-Quintero 2013).
So to my mind, neonicotinoid insecticides do not meet Koch's postulates
as causal factors for CCD.
in relation to the work of Jacob Henle and Edwin Klebs.
The key concepts in the Koch's postulates
are: (i) specificity of the association of a micro-organism with an infectious condition; (ii) biologically and scientifically plausible correlation of microbiological, pathological and clinical features; (iii) isolation of the causative micro-organism by culturing it on laboratory media; and (iv) reproduction of disease by inoculating the isolated micro-organism into a susceptible host.
Aetiology: Koch's postulates
fulfilled for SARS virus.
Koch's strict criteria of proof of etiology came to be defined as Koch's postulates
HIV fulfills Koch's postulates
as the cause of AIDS.
The inadequacy of the disease metaphor, which some public health specialists seem to take quite literally, is readily apparent when we consider Koch's postulates
, the criteria by which suspected pathogens are supposed to be judged: 1) The microorganism must be observed in all cases of the disease; 2) the microorganism must be isolated and grown in a pure culture medium; 3) microorganisms from the pure culture must reproduce the disease when inoculated in a test animal; and 4) the same kind of microorganism must be recovered from the experimentally diseased animal.
The results of studies concerning self replication and Koch's postulates
are currently being analyzed.
state that an organism must be 1) found in all cases of the disease examined, 2) prepared and maintained in a pure culture, 3) capable of producing the original infection, even after several generations in culture, and 4) retrievable from an inoculated animal and cultured again.
However, Koch's postulates
cannot be applied to children, so we need to develop other methods of determining the pathologic significance of organisms recovered from infected middle ears.
Researchers haven't yet tested whether IAPV meets the standard requirements, called Koch's postulates
, that would define it as the cause of colony-collapse disorder.