sporadic case

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The working hypothesis was that primary sporadic cases resulted from exposure to foods originating from, or contaminated by foods produced at a single food premises.
It is quite possible that these sporadic cases are in fact indicative of endemic infections, not yet acknowledged as such.
The majority of familial cases are clinically and pathologically very similar to sporadic cases, leading to the hypothesis that they share common pathogenic mechanisms.
Primary sporadic cases identified during the descriptive investigation were eligible for analysis.
Sporadic cases of community acquired legionnaires' disease : an ecological study to identify new sources of contamination.
Over the 10-year period about 10 000 close contacts of sporadic cases of meningococcal disease had received rifampicin prophylaxis.
However, it is quite possible that sporadic cases are occurring at a low level.
The informants stressed, moreover, that these occurrences were no incidents, sporadic cases totally disconnected from plantation life.
Few studies have been conducted in northern areas of the country where malaria recently re-appeared, and in the central plateau where sporadic cases occur.
The isolates from humans were either domestic or foreign, and the domestic isolates were either from outbreaks or sporadic cases.
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