Giardiasis in Man

Acute Infectious Lymphocytosis

“…Finally, this question has to be discussed. The total incidence of giardiasis in 12 out of the 53 children at the nursery, as determined by mostly single stool tests, is probably within the usual limits, for Boeck (1927) found that the incidence in children reported in the literature varied from 14 to 40%, and it is known to be even higher in residential institutions (Brown, 1948). There is still no agreement concerning the pathogenicity of these parasites, but they can probably be responsible for malabsorption (Vdghelyi, 1940) and may sometimes cause enteritis (Miller, 1926;Ormiston et al, 1942).…”

“…With the members of the family of Cases 1 and 2 this adds up to 12 infested children out of 53. The real incidence may be assumed to have been considerably higher, as it is well known that G. lamblia may be found only after repeated testing of stools and that one examination per case will discover only from onethird to one-half of the actual number of infections (see Boeck, 1927). Moreover, the faeces were examined by inspection of wet films in saline and not by concentration methods.…”

Enteritis in a Nursery Home associated with Giardia lamblia

“…Such an observation was not possible for a worker like Boeck (1927), who, on statistical grounds alone, was unable to satisfy himself that Giardia was more than a harmless parasite.…”

Acute Infectious Lymphocytosis

“…With the members of the family of Cases 1 and 2 this adds up to 12 infested children out of 53. The real incidence may be assumed to have been considerably higher, as it is well known that G. lamblia may be found only after repeated testing of stools and that one examination per case will discover only from onethird to one-half of the actual number of infections (see Boeck, 1927). Moreover, the faeces were examined by inspection of wet films in saline and not by concentration…”