1.Recovery of Schistosoma haematobium ovum from Labeo rohita: first report from Pakistan
Ayaz, M.M., Nazir, M.M., Lashari, M.H., Akhtar, S., Khosa, M.A., Aziz, M., Zahid, H., Ali, S.
Tropical Biomedicine 2015;32(3):399-401
Schistosomiasis, also known as bilharzia, is a parasitic disease caused by
trematodes from the genus Schistosoma that can infect humans and animals. S. mansoni, S.
japonicum, and S. mekongi all causes intestinal schistosomiasis except S. haematobium
that causes urinary schistosomiasis. It is only specie which effects urinary system, it can
affect liver, heart, lungs also but very rarely. Schistosoma haematobium is endemic to over
50 countries in Africa and the Middle East and Western Asia and may be fatal in HIV positive
people. A number of reports from the African countries like Nigeria have been reported. A few
cases are reported 9but in Pakistan it has never been reported before in native people. It is
first time reported in Pakistan in the intestine of Rahu (Labeo rohita). The purpose of this
study is to elaborate the approach of zoonotic agent by various other routes including the
commonly available fish
2.Antibacterial activity of plant essential oils against indigenously characterized methicillin-resistant Staphylococcus aureus (MRSA)
Ali, T. ; Anjum, A.A. ; Sattar, M.M.K. ; Ali, M.A. ; Kamran, M. ; Tariq, M. ; Manzoor, R.
Tropical Biomedicine 2022;39(No.1):17-25
Plant essential oils were evaluated for antimicrobial activity against Methicillin-resistant
Staphylococcus aureus (MRSA). The isolates (n=03) were procured from Institute of Microbiology,
UVAS Lahore, Pakistan. After biochemical and 16S rRNA gene-based PCR characterization,
accession numbers were retrieved from NCBI i.e. MW344063.1, MW344064.1 and MW344065.1.
These isolates exhibited molecular positivity by multiplex PCR for mecA, coa and eta toxin
genes. Moreover, these isolates exhibited resistance to cefoxitin, ampicillin, amoxicillin,
penicillin, amoxicillin clavulanate, ciprofloxacin, erythromycin and gentamicin. The antibiotic
resistant isolates were evaluated for antimicrobial activity of plant essential oils. The
highest zone of inhibition (mean ZOI±S.D.) was measured for Cinnamomum verum (22.67±1.52
mm) followed by Eucalyptus globulus (18.67±2.51 mm) and Syzygium aromaticum (12.67±2.51 mm).
Lowest mean MIC value (0.33±0.11 mg/mL) was recorded for E. globulus. Eucalyptus globulus was
processed for fractionation by column chromatography and n-hexane, chloroform, n-hexane
+ chloroform and ethyl-acetate fractions were evaluated for antibacterial activity. Lowest
mean MIC (10.04±5.80 mg/mL) was recorded for E. globulus n-hexane fraction. Cell survival
percentage of BHK21 cell line was 51.7% at 54.87mg/mL concentration of E. globulus n-hexane
fraction. Through gas chromatography-mass spectrometry (GC-MS) analysis of n-hexane
fraction, benzene was found abundant (29.9%) as active compound. It was concluded that E.
globulus n-hexane fraction exhibited significantly promising results against MRSA.
3.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.
4.Antimicrobial activity of essential oils of Curcuma longa and Syzygium aromaticum against multiple drug-resistant pathogenic bacteria
Zeshan, M.Q. ; Ashraf, M. ; Omer, M.O. ; Anjum, A.A. ; Ali, M.A. ; Najeeb, M. ; Majeed, J.
Tropical Biomedicine 2023;40(No.2):174-182
The present study was conducted to investigate the antimicrobial potential of essential oils of Curcuma
longa and Syzygium aromaticum against multidrug-resistant pathogenic bacteria. Four identified
bacterial isolates including Methicillin-resistant Staphylococcus aureus (MRSA), Escherichia coli, Klebsiella
pneumoniae, and Acinetobacter baumannii were selected and their antibiotic sensitivity was checked
by disc diffusion assay. C. longa and S. aromaticum were subjected to steam distillation to obtain their
essential oils. The crude essential oils were fractioned by employing column chromatography. Crude
essential oils and their fractions were evaluated for their antibacterial activity by agar well diffusion
assay and minimum inhibitory concentrations were calculated. All the selected bacterial isolates
showed resistance to three or more than three antibiotic groups and were declared as multidrugresistant (MDRs). Crude essential oils of C. longa and S. aromaticum exhibited antimicrobial activity
against all selected isolates but S. aromaticum activity was better than the C. longa with a maximum
19.3±1.50 mm zone of inhibition against A. baumannii at 1.04 µL/mL MIC. GC/MS analysis revealed
the abundance of components including eugenol, eugenyl acetate, b- caryophyllene, and a- Humulene
in both crude oil and fractions of S. aromaticum. While the main components of C. longa essential oil
were Ar-tumerone, a–tumerone, b- Tumerone, I-Phellandrene, a-zingibirene, b- sesquiphellandrene,
and p- Cymene. This study highlights that plant-based essential oils could be a promising alternative to
antibiotics for which pathogens have developed resistance. C. longa and S. aromaticum carry compounds
that have antimicrobial potential against multiple drug-resistant bacteria including MRSA. E. coli, K.
pneumoniae and A. baumannii.
5.Molecular detection and phylogenetic analysis of Leishmania major in stray dogs in Riyadh Province, Saudi Arabia
Alanazi, A.D. ; Rahi, A.A. ; Ali, M.A. ; Alyousif, M.S. ; Alanazi, I.O. ; Mahmoud, M.S. ; Abdel-Shafy, S. ; Alraey, Y.A. ; Alouffi, A.S.
Tropical Biomedicine 2019;36(2):315-323
Dogs can act as a reservoir of canine leishmaniasis disease, which is caused by
Leishmania species. The study aimed to identify and document the genotype of cutaneous
leishmaniasis (CL) in the stray dogs in Riyadh Province using kinetoplast DNA (kDNA) as a
target gene by using nested polymerase chain reaction (nPCR). This cross-sectional
investigation was conducted over the course of two years, from March 2016 to July 2018,
in different districts of Riyadh Province, Saudi Arabia. A total of 237 dogs were examined,
only 18 of the dogs were suspected clinically of cutaneous leishmaniasis due to the presence
of cutaneous nodules and cutaneous lesion. Biopsy tissue collections were performed and
DNA was extracted. CSB2XF and CSB1XR primers were used to amplify the Leishmania
kDNA regions. The Leishmania species were detected by specific 13Z and LIR primers by
applying nested PCR assay. Nine dogs were found to be positive for Leishmania major.
The examined dogs were negative for other Leishmania spp. The phylogenetic analysis
and blast results of kDNA showed that the 9 isolates L. major is closely related (99.9%) to
the L. major isolate CMG_irfan5, accession number HQ727556.1 from human, Pakistan.
This is the first molecular study on dog leishmaniasis from Saudi Arabia confirmed that
dogs have a L. major infection. Further epidemiological and molecular investigations are
required to study domestic and wild canine infections with L. major and other Leishmania
spp in endemic and nonendemic areas of Saudi Arabia as part of leishmaniasis control
6.Poverty-associated emerging infection of Cystic Echinococcosis in population of Northern Pakistan: A hospital based study
Khan, A. ; Ahmed, H. ; Simsek, S. ; Gondal, M.A. ; Afzal, M.S. ; Irum, S. ; Muhammad, I. ; Mansur, H. ; Fatima, A. ; Ali, M.S. ; Riaz, N. ; Akbar, A. ; Weiping, W. ; Yayi, G.
Tropical Biomedicine 2019;36(2):324-334
Cystic Echinococcosis (CE) is one of the most important zoonotic parasitic diseases
in human, livestock, and wildlife globally. The prevalence of CE depends upon human behavioral
risk factors, the diversity and ecology of animal host interactions and the genetic diversity
within Echinococcus species which differ in their zoonotic potential and pathogenicity. It is
a neglected, economic and socio-cultural problem in Pakistan. The available data about the
incidence of CE is very limited and no extensive study has been reported in Pakistan. The
current study was aimed to analyze the hospital reported cases of CE and the associated risk
factors related to the incidence of CE. The hospital-based data of CE for the time period of
January 2012-December 2017 was collected from Islamabad, Rawalpindi and Peshawar. The
data covered demographic characteristics including age, gender, and cyst localization of
infected individuals and socioeconomic determinants. The data was analyzed based upon
different risk factors along with the different socioeconomic parameters that has an important
impact on the distribution of disease. A total of 228 cases were presented in the selected
hospitals of different cities during the study period. Out of total 228 patients, 59.21% were
males and 40.78% were females (P<0.001). Most infections have been recorded in young
adults (>20-30) showing 22.8% of total infected individuals followed by children (0-10) showing
10.5% (n=24), respectively (P<0.001). Liver was the most vulnerable organ (58.77%, n=134)
followed by lungs (14.47%, n=33) (P<0.001). The infection was higher among rural communities
(84.2%) than urban (12.8%) (P<0.001). Socioeconomic and demographic factors had an
important impact on the intensity of disease (P<0.001). The occurrence of cases in children
and young adults was an important finding as it indicated an active transmission of the
parasite in Pakistan along with the poverty index. Emergence of echinococcosis in Pakistan
showed that emerging health issues in Pakistan could bring the disease to limelight for future
research. This finding, together with the fact that 1 hospital reported 214 cases over 6 years
325
underlines the need for a program for prevention/control of this disease in Pakistan. The
timely measure needs to be taken to hamper the disease development and establishment. In
order to control the disease, complete surveillance should be done which in turn weighs down
the disease progress.