Related Experiment Video

Updated: Mar 17, 2026

An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines
07:18

An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines

Published on: October 11, 2022

2.6K

Rickettsial Disease in the Peruvian Amazon Basin

Claudine Kocher1,2, Amy C Morrison2, Mariana Leguia2

  • 1Kantonsspital Baden, Baden, Switzerland.

Plos Neglected Tropical Diseases
|July 15, 2016
PubMed

Insights

Rickettsial infections are prevalent in Peru, with nearly 2% of febrile patients showing evidence of infection. Pathogen transmission was confirmed in domestic animals and their ectoparasites, highlighting a significant risk in the Peruvian Amazon.

Area of Science:

  • * Infectious Diseases
  • * Medical Entomology
  • * Zoonotic Pathogens

Background:

  • * Rickettsial infections, including spotted fever group rickettsiae (SFGR) and typhus group rickettsiae (TGR), are significant public health concerns globally.
  • * Undifferentiated febrile illnesses in endemic regions often require etiological diagnosis to guide treatment and surveillance.
  • * The Peruvian Amazon is a region with potential for emerging infectious diseases due to its rich biodiversity and human-animal interactions.

Purpose of the Study:

  • * To determine the prevalence of rickettsial infections in undifferentiated febrile cases in Iquitos, Peru.
  • * To investigate the presence and transmission of spotted fever group rickettsiae (SFGR) and typhus group rickettsiae (TGR) in domestic animals and their ectoparasites.
  • * To identify risk factors associated with rickettsial infections in the study population.

Main Methods:

  • * A passive, clinic-based surveillance program enrolled 2,054 participants with undifferentiated febrile illness.
  • * Blood samples from humans and animals were tested for SFGR and TGR using ELISA and PCR.
  • * Ectoparasites (fleas and ticks) were collected from animals and screened for Rickettsia spp. by PCR. Logistic regression was used for statistical analysis.

Main Results:

  • * Nearly 2% of human participants showed serological evidence of rickettsial infection.
  • * Rickettsia spp. were detected in a high proportion of fleas (97.4%) and ticks (5%).
  • * Candidatus Rickettsia asemboensis was identified in 100% of fleas and 33% of ticks, indicating pathogen presence in the local ectoparasite fauna.

Conclusions:

  • * Human pathogenic SFGR are circulating in the Peruvian Amazon.
  • * Domestic animals and their ectoparasites serve as reservoirs and vectors for rickettsial pathogens.
  • * Individuals exposed to domestic and peri-domestic animals and their ectoparasites face a significant risk of rickettsial infection.

More Related Videos

In Vivo Infection with Leishmania amazonensis to Evaluate Parasite Virulence in Mice06:57

In Vivo Infection with Leishmania amazonensis to Evaluate Parasite Virulence in Mice

Published on: February 20, 2020

8.8K
Extraction of Saliva, Haemolymph, Salivary Glands, and Midgut from Individual Ticks (Acari: Ixodidae)03:22

Extraction of Saliva, Haemolymph, Salivary Glands, and Midgut from Individual Ticks (Acari: Ixodidae)

Published on: October 31, 2025

945

Related Concept Videos

Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
3.8K
Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
1.1K
Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
707
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
679
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
1.3K