Background
Some reports are available on the prevalence of opportunistic parasitoses among hemodialysis (HD) patients, yet there is a paucity of data on the association of CD4+ T-cell counts with such infections. Therefore, this study aimed to determine the prevalence of intestinal parasites and
Toxoplasma gondii
in relation to CD4+ counts among HD patients in Alexandria, Egypt.
Methods
A comparative cross-sectional study was conducted on 120 HD patients and 100 apparently healthy individuals between December 2014 and January 2016. Data and samples (stool and blood) were collected from the participants after obtaining their informed consent. Stool samples were examined for parasites after concentration and staining, EDTA-blood samples were used for CD4+ counting by flow cytometry, and sera were analyzed for anti-
Toxoplasma
IgM and IgG antibodies.
Results
A significantly higher prevalence rate of intestinal parasitoses was found among HD patients compared to apparently healthy individuals (52.5% vs. 12.0%, respectively), with absence of helminths.
Cryptosporidium
species (32.5%),
B. hominis
(24.2%) and microsporidia (11.7%) were the most frequent parasites among HD patients, while
B. hominis
(13.0%),
Cryptosporidium
species (11.0%) and
G. lamblia
(4.0%) were the most frequent parasites among their counterparts. Statistically significant differences in parasite infection rates between patients and their counterparts were found for
Cryptosporidium
species,
B. hominis
and microsporidia. However, parasite species were not significantly associated with diarrhea. On the other hand, the overall
T. gondii
seroprevalence rate among HD patients was significantly higher than that among their counterparts (33.3% vs. 8%, respectively). HD patients with CD4+ counts < 200 cells/μl were twice more exposed to intestinal parasitoses compared to those with counts ≥200 cells/μl, but the difference was not statistically significant. However, low CD4+ counts were significantly associated with higher rates of
Cryptosporidium
species, microsporidia and
T. gondii
.
Conclusions
Intestinal parasitoses and
T. gondii
infection rates are significantly higher among Egyptian HD patients compared to apparently healthy individuals, with
Cryptosporidium
species,
B. hominis
, microsporidia and
T. gondii
being the most frequent parasites. CD4+ counts < 200 cells/μl are significantly associated with
Cryptosporidium
species, microsporidia and
T. gondii
among HD patients. ...