1.Sero-epidemiology and risk factor analysis of human brucellosis in Punjab, Pakistan: a cross sectional study
Nawaz, Z. ; Shafique, M. ; Zahoor, M.A. ; Siddique, A.B. ; Ali, S. ; Arshad, R. ; Kausar, S. ; Khan, K. ; Asad, M. ; Rehman, A.U. ; Masih, I.
Tropical Biomedicine 2021;38(No.3):413-419
Human brucellosis is a neglected zoonotic problem worldwide with a high degree of morbidity in humans and is mostly overlooked due to other febrile conditions. The aim of this study was to evaluate the sero-prevalence and risk factors of human brucellosis among subjects living in Punjab, Pakistan. In this cross-sectional study, human blood samples were collected from seven districts of Punjab, Pakistan. Information regarding personal data, demographic data and potential risk factors was collected through a structured questionnaire. Detection of anti-Brucella antibodies was done through Rose Bengal Plate Test (RBPT) and Enzyme Linked Immunosorbent Assay (ELISA). Descriptive analysis, Chi square test and Odds ratio was applied using STATA software version 12. The sero-prevalence of human brucellosis was 13.13% with significantly higher percentage in males 17.23% and age group 25-40 years 16.50% (P=< 0.001). The demographic factors positively associated with human brucellosis were lack of education (P = 0.003; OR = 1.85) and farming as an occupation (P =<0.001; OR = 2.50) Similarly, among the risk factors studied, keeping animals at home (P =<0.001; OR = 2.03), slaughtering of animals (P =<0.001; OR = 15.87) and consuming raw milk (P =<0.001; OR = 5.42) were the factors strongly connected with human brucellosis. A massive awareness should be given to livestock farmers and individuals directly linked to animals regarding risk factors and transmission of brucellosis. Consumption of unpasteurized milk and its products should be condemned to curtail this neglected disease.
2.First molecular detection of porcine circovirus type 4 (PCV4) in Malaysia
Tan, C.Y. ; Thanawongnuwech, R. ; Arshad, S.S. ; Hassan, L. ; Lee, C.Y. ; Low, S.E. ; Fong, W.C.M. ; Ooi, P.T.
Tropical Biomedicine 2023;40(No.3):301-306
Porcine circovirus type 4 (PCV4) is the newest member in the porcine circovirus family, first reported in
2020. To date, the presence of PCV4 has only been reported in China, South Korea and most recently
in Thailand. Detection of PCV4 have been reported in various production stages of pigs from piglets,
finishers to sows; associated with a myriad of clinical manifestations including porcine dermatitis and
nephropathy syndrome (PDNS), postweaning multisystemic wasting syndrome (PMWS), respiratory,
enteric and neurological diseases. While successful virus isolation and culture has yet to be reported,
pathogenicity of PCV4 has been demonstrated through infectious clone studies. The objective of this
study is to investigate the presence of PCV4 in Malaysian porcine population to update the epidemiology
of porcine circoviruses in Malaysia. A total of 49 samples from commercial intensive pig farms,
abattoir and wild boar population were subjected to conventional polymerase chain reaction assay to
detect PCV4 capsid (cap) genome. Resulting cap nucleotide sequences were analyzed for maximum
likelihood phylogeny relationship. Results revealed that PCV4 is present in Peninsular Malaysia at a
molecular prevalence of 4.08% (2 / 49 samples). Both PCV4 positive samples originated from clinically
healthy finishers. Malaysian PCV4 strains were classified as genotype PCV4b, and were found to be
phylogenetically distinct from the China, South Korea and Thailand strains. With this latest update of
the novel PCV4 in Malaysia, it is clear that more attention needs to be given to the investigation of
novel porcine circoviruses (PCV) and management of PCV diseases.