Newไรที่มีความสำคัญทางสัตวแพทย์18-10-62

Laelaps echidnina chelicerae sternal plate genito-ventral plate anal plate anus สงั เกต genito-ventral plate โคง้ เวา้ รบั กบั anal plate

Laelaps echidnina peritre chelic erae spiracmle eor tritoster stigmata num sternal plate genito-ventral plate เวา้ รบั กบั anal plate an anal us plate

Laelaps nutalli (female) chelicerae palpus sternal plate genito-ventral plate anal plate สงั เกต genito-ventral plate ไมเ่ วา้ มี setae 4 คูบ่ น genito-ventral plate

Laelaps nutalli (female) chelicerae palpus tritosternu m peritreme sternal spiracle plate metapodal genito-ventral plate plate ไม่เวา้ มี setae 4 คู่ anal plate

Laelaps nutalli (male) genital aperture ventral plate รวมกนั anus สงั เกตไมม่ ี genito-ventral plate แตจ่ ะมเี พยี ง ventral plate เทา่ นน้ั

Dermanyssus gallinae Poultry red mite, Dermanyssus gallinae

Poultry red mite • Phylum Arthropoda • Class Arachnida • Order Acari • Family Dermanyssidae • Genus Dermanyssus • Species gallinae Poultry red mite, Dermanyssus gallinae

Dermanyssus gallinae

Dermanyssus gallinae

Blood sucking mites of poultry Dermanyssus gallinae

Ornithonyssus spp. pedipcahlpelicerae sternal genito-ventral plate plate คอ่ นขา้ ง anal plate แหลม anu s สงั เกต genito-ventral plate มลี กั ษณะคอ่ นขา้ งแหลม

Ornithonyssus bacoti

Ornithonyssus bacoti Ornithonyssus bacoti (tropical rat mite), female: ventral and dorsal view (Scanning Electronic Microscope, Phenom World).

Harvest mites (Chiggers)

Chigger larva of trombiculid mite, Leptotrombidium spp. cheliceral blade pedipalp scutum sensillary base(sensillary pit) scutal setae

Chiggers mite Bacterial diseases (Harvest mite) • Scrub typhus (Orientia tsutsugamushi) • α-proteobacteria (reclassified as a new genus separate from Rickettsia based on phenotypic and genotypic differences • Orientia differs from Rickettsia in the structure of the cell wall, antigenic profile, and genome size, which is almost twice the size of the Rickettsia genome • Mite-borne typhus bite of Larvae of some species of genus Leptotrombidium

• Epidemiology in Thailand • Leptotrombidium delensis • L. chiangraiensis, • L. imphalum • L. scutellare

Chiggers mites Life cycle (Leptotrombidium spp.) • egg deutovum larva (Chiggers)  protonymph  deutonymph tritonymph  adult

Chiggers mites Clinical signs of scrub typhus (Leptotrombidium spp.) • The incubation period can be from 6 to 20 days (Average 10 days) • Papule followed by an eschar at the site of chigger feeding (only in 50%) • Fever, Headache, Myalgia • Cough and Lung infection • Diarrhea, abdominal pain, nausea and vomiting • Maculopapular rash • Blood-shot eyes

Chiggers mites Clinical signs of scrub typhus (Leptotrombidium spp.) • Indigenous patients do not commonly develop rash or lymphadenopathy which is thought to be related to previous exposure • Severe cases can develop encephalitis and interstitial pneumonia and this may be fatal

Rodent mites • Ornithonyssus bacoti (tropical rat mite) • Laelaps echidnina (spiny rat mite) • Liponyssoides sanguineus (house mouse mite)

Rodent mites • Rodent mite dermatitis • Ornithonyssus bacoti (tropical • occurring after human rat mite) contact with haematophagous • Laelaps echidnina (spiny rat mesostigmatid mites that infest rodents, such has mite) house mice, rats and hamsters • Liponyssoides sanguineus (house mouse mite)

Rodent mites • Rodent mite dermatitis • Ornithonyssus bacoti (tropical • Rodent mite bites leave rat mite) multiple groups or individual small itchy papules (around 1– • Laelaps echidnina (spiny rat 2 mm in diameter) on the skin (papular urticaria) mite) • Found mostly on the upper • Liponyssoides sanguineus extremities, neck, upper trunk, (house mouse mite) face

Rodent mites • Ornithonyssus bacoti (tropical rat mite) 2-year-old girl: skin injuries caused by bites of the Tropical Rat Mite, Ornithonyssus bacoti

Prevention and control rodent mites • Locate the rodent host origin and eradicate • Remove rodent nest • Blocking the rodents means of entry into the building

Treatment rodent mite dermatitis • Antihistamines and corticosteroids, to relieve the associated itching and allergic reactions

Poultry mites • Dermanyssus gallinae (poultry red mite) • Ornithonyssus bursa (tropical fowl mite) • O. sylviarum (northern fowl mite)

Poultry mite dermatitis Dermanyssus gallinae (poultry red mite) infestation in 55 years-old male: multiple skin reactions on trunk (a). Detail of (a); (b).

Poultry mite dermatitis Red mites (ungorged) attracted by warm hiding places, such as TV in stand-by mode

Poultry mite dermatitis Ornithonyssus sylviarum (northern fowl mite) infestation. Eruption of erythematous papules on the trunk, marked by a central red puncture (a). Detail of (a); (b).

House mouse mite (Liponyssoides sanguineous) • Rickettsial pox (Rickettsia akari) • Liponyssoides sanguineus is a species of mite that infests the house mouse Transmit human disease • causing rodent mite dermatitis in humans

Tropical rat mites (Ornithonyssus bacoti ) • Murine typhus (Rickettsia typhi) • Typhus group

snake mite • Epidemic hemorrhagic (Ophionyssus natricis) septicemia

Medical and Veterinary Importance • Dermatitis • Family Trombiculidae (Prostigmata) • Chigger mites (Leptotrombidium spp.)

Medical and Veterinary Importance • Dermatitis • Family Dermanyssidae (Mesostigmata) • Poultry red mites (Dermanyssus gallinae) • Tropical rat mites (Ornithonyssus bacoti)

Parasitic group • Parasitic mites • Vertebrate animals • Bird and Rodent mites (Dermanissus spp., Ornithonyssus spp.)

Ornithonyssus sylviarum Scanning electron microscope (SEM) photograph showing ventral view of the tropical fowl mite, Ornithonyssus bursa (Berlese). Photograph by H. L. Cromroy, University of Florida.

Ornithonyssus sylviarum

Non-Burrowing Mites

Ornithonyssus sylviarum



Ornithonyssus bursa Three pairs of setae on the sternal plate of the tropical fowl mite, Ornithonyssus bursa (Berlese), helps differentiates it from the northern fowl mite, Ornithonyssus sylviarum (Canestrini and Fanzago). Photograph by Marcelo de Campos Pereira, University of Sao Paulo.

Ornithonyssus sylviarum Three pairs of setae on the sternal plate of the tropical fowl mite, Ornithonyssus bursa (Berlese), helps differentiates it from the northern fowl mite, Ornithonyssus sylviarum (Canestrini and Fanzago). Photograph by Marcelo de Campos Pereira, University of Sao Paulo.

Megninia spp.(male) latero-ventral triangular cuff-like projection ขาคูท่ ี่ 3 มขี นาดใหญ่ กวา่ ขาคูอ่ นื่ ๆ

Megninia spp.(male) latero-ventral triangular cuff-like projection

Lynxacarus radovskyi in cat Salt peppered coat of infested cat Adult Lynxacarus radovskyi Egg of Lynxacarus radovskyi

Lynxacarus radovski - Laterally compressed shape - Propodosonal plate - Striae

Listrophorus gibbus In Rabbit - Laterally compressed shape - Head plate - No Propodosonal plate - Oval shaped body