<div>Background: Carangids, like any other fish, can become infected with a variety of external and internal parasites. Little information on parasite infestations in these fish species is known. This study aimed to provide light on parasites that infect caragnids in Saudi Arabia.&nbsp; 
 
Methods: A total of 20 Carangoides caeruleopinnatus specimens were collected from the Red Sea (Saudi Arabia) and then examined for the presence of digenetic trematodes. Parasitic species were isolated and studied morphologically by using light microscopic examination and molecularly via the partial sequencing of 18S rRNA and 28S rRNA genes.&nbsp; 
 
Result: Only one parasitic species has been identified. This parasite is morphologically and morphometric compatible with previously Monostephanostomum mesospinosum, identified from Carangoides malabaricus in VSK, BOB. Phylogeny revealed that these putative acanthocolpid species nested well within a clade clustering Monostephanostomum species, which along with morphological data, suggests it is a member of the genus Monostephanostomum. Query sequences showed identities of 97.99% and 97.98% for 18S (EF506762.1.1) and 28S rRNA (EF506763.1) of Monostephanostomum nolani, respectively. This study reflects the third account of this genus as endoparasitic taxa of various carangid fish, as well as providing novel DNA data for this species.</div>

Monostephanostomum mesospinosum (Digenea: Acanthocolpidae) Infecting the Coastal Trevally Carangoides caeruleopinnatus (Carangiformes: Carangidae) from the Marine Water off Saudi Arabia

<div style="text-align:justify">Background: Present study was aimed to record diversity, prevalence and risk assessment of nematode parasites in Indian gerbil, Tatera indica, a wild rodent species found in crop fields. &nbsp;&nbsp; 
 
Methods: Total 180 Indian gerbils (T. indica) were live trapped from crop fields of Ludhiana, Punjab between April, 2019 to March, 2020 and examined for the diversity and prevalence of nematode parasites in liver and gastrointestinal tract.&nbsp; 
 
Result: Only 33 (18.33%) gerbils were found infected with four nematodes species i.e. Nippostrongylus brasiliensis (39.40%), Calodium hepaticum (21.21%), Trichuris muris (21.21%) and Syphacia muris (18.18%). Eggs of N. brasiliensis, T. muris and S. muris were found in faecal samples. &nbsp;Pale yellow lesions on surface of liver and subsequent histopathology of infected liver indicated the presence of C. hepaticum eggs entrapped in parenchyma. Host age (&chi;2 = 8.78, P = 0.03) and season (&chi;2 = 9.21, P = 0.01) significantly affected the prevalence of N. brassiliensis and C. hepaticum, respectively. Shannon-Weiner index and Species Evenness of nematode parasites were maximum in monsoon season (1.04 and 0.94, respectively). Based on results proper rodent pest management is advised by integrated control measures at village level to prevent spread of diseases caused by them.</div>

Monostephanostomum mesospinosum (Digenea: Acanthocolpidae) Infecting the Coastal Trevally Carangoides caeruleopinnatus (Carangiformes: Carangidae) from the Marine Water off Saudi Arabia

Diversity, Prevalence and Risk Assessment of Nematode Parasites in Tatera indica found in Punjab State