1.Bovine anaplasmosis: A systematic review with meta-analysis on the global prevalence
Nur-Amalina, N. ; Nur-Sabrina, A.M. ; Muhamad-Ali, H.A.M. ; Basripuzi, N.H.
Tropical Biomedicine 2023;40(No.4):375-382
Bovine anaplasmosis, caused by Anaplasma marginale, is a significant infectious disease affecting
cattle populations globally. However, the prevalence and distribution of bovine anaplasmosis vary
across regions, making it crucial to assess its global burden systematically. This study aims to provide a
comprehensive understanding of the global prevalence of bovine anaplasmosis and synthesized data
from diverse geographic regions. A literature search was conducted to identify all relevant published
articles reporting the prevalence of bovine anaplasmosis and a total of 164 studies were found eligible
for final systematic review and meta-analysis. Meta-analysis was conducted using meta package of R
software and summary estimates of the prevalence were calculated. Meta-analysis of 129,851 samples
from 42 countries was conducted and the overall estimated prevalence of bovine anaplasmosis was
found to be 38% (100% CI = 33% - 42%). The prevalence was found to be higher in cattle (39.9%) in
comparison to yaks (6.4%). Diagnosis using serology (40.2%) yielded a higher prevalence compared
to molecular testing (38.3%) and blood smears (22.4%) methods. Additionally, there were significant
differences in the prevalence of bovine anaplasmosis between different countries (p<0.05). This study
will inform evidence-based strategies for control and prevention of bovine anaplasmosis on a global
scale by discovering the true extent of the disease and identifying high-prevalence areas.
2.Gastrointestinal Parasites in Asian and African Elephants: A Systematic Review
Qurratul-Saadah, Z. ; Che-Amat, A. ; Syed-Hussain, S.S. ; Kamaludden, J. ; Ariffin, S.M.Z. ; Basripuzi, N.H. ; Nor-Azlina, A.A.
Tropical Biomedicine 2023;40(No.1):55-64
Gastrointestinal parasites (GIPs) in elephants have been reported in several studies over the last
decades. Nonetheless, comprehensive data on clinicopathology of elephant GIPs, parasite burden
threshold value, and the effectiveness of conventional anthelmintic drugs are still lacking. Herein, we
have systematically reviewed the available knowledge on elephant GIPs identified among different parts
of the world based on their prevalence, epidemiology, pathology, diagnosis, treatment, and control.
Two electronic databases were searched for publications that met the inclusion criteria. About19
English journal articles published between year of 2011- 2021 were included. The main GIPs reported
in elephants were Cyathostomidae (at least 14 species), Ancylostomidae, Haemonchus contortus,
Trichostrongylus colubriformis, Oesophagostomum columbianum, Oesophagostomum aceleatum,
Ascarids, Trichurids, Strongyloides, Anophlocephalidae, flukes, and Coccidia across different parts
of the world, including Malaysia, Indonesia, Thailand, Myanmar, Sri Lanka, India, Kenya, Nigeria, and
South Africa. Most elephants show no clinical signs until the equilibrium between parasite and host
is disturbed. The common diagnostic methods for GIPs are traditional direct smear, faecal floatation,
sedimentation, and McMaster egg counting technique, all involving morphological identification.
However, some articles described the use of molecular detection to characterise common GIPs of
elephants. Although benzimidazoles and macrocyclic lactones group of anthelmintic are the most
conventional GIPs treatment and control for captive and semi-captive elephants, there is limited data
on the threshold value of faecal egg count as the baseline for treatment decision. Over the last decades,
various studies regarding elephant GIPs have been conducted. However, more focused and systematic
studies are required to enhance our knowledge in multiple aspects of elephant parasitology to find
effective solutions and improve elephant health.