Uchôa FFDM, Sudré AP, Macieira DDB, Almosny NRP. The influence of serial fecal sampling on the diagnosis of giardiasis in humans, dogs, and cats.
Rev Inst Med Trop Sao Paulo 2017;
59:e61. [PMID:
28902297 PMCID:
PMC5574627 DOI:
10.1590/s1678-9946201759061]
[Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 05/31/2017] [Indexed: 12/25/2022] Open
Abstract
Giardia infection is a common clinical problem in humans and pets.
The diagnosis of giardiasis is challenging as hosts intermittently excrete protozoan
cysts in their feces. In the present study, we comparatively evaluated two methods of
serial fecal sampling in humans, dogs, and cats from Rio de Janeiro, Brazil. The
Faust et al. technique was used to examine fecal specimens collected in triplicate
from 133 patients (52 humans, 60 dogs, and 21 cats). Specimens from 74 patients were
received from the group assigned to carry out sampling on consecutive days - 34
humans, 35 dogs, and 5 cats, and specimens from 59 patients were received from the
group assigned to carry out sampling on non-consecutive, separate days - 18 human
beings, 25 dogs, and 16 cats. G. duodenalis cysts were found in
stools of 30 individuals. Multiple stool sampling resulted in an increase in the
number of samples that were positive for Giardia in both groups. The
authors therefore conclude that multiple stool sampling increases the sensitivity of
the Faust et al . technique to detect G. duodenalis
cysts in samples from humans, cats and dogs.
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